Minimep - Elreha

Valid for the following types containing Software Version 2.5x: 

MiniMEP 404 S, 2404 S 

MiniMEP 424 A, 2424 A, 424A/12V 

MiniMEP 434 A, 2434 A 



Brief Description 

MiniMEP Recording Systems (dataloggers) are designed for 

paperless longtime data recording of temperature values and 

(dep. on type) relative humidity. Thus the user is able to get a 

proof about the course of temperatures and humidity in 

corresponding rooms, without application of additional 

components as e.g. mechanical printers or PC's. 

It is ideal for compliance with 21 CFR process control for food 

storage regulations and HACCP Quality Assurance Systems. 

The wide temperature range qualifies a MiniMep for both freezing 

applications and 'hot' industrial processes. 

The Recording System MiniMEP meets all requirements of 

the EU Standard EN 12830. 

Functions 

� Records the values of temperature sensors resp. humidity 

transmitters for up to 20 years ! 

Adjustable storage interval. 

Example 1: 781 days with a 5 minute interval. 

Example 2: > 6 years with a 15 min. interval 

� Data storage is unlimited even without mains voltage 

� Real time clock with typ. 10 years battery backup 

� Continuous recording by external lead accu possible * 

� Alarm too high/low with time delay for each input 

� Monitored sensor inputs 

� Error message memory shows the last 6 occured errors 

� Clear assignment of measuring position, time and value 

plain text designation in the display 

� Networkable via interface 

� LCD dot matrix display, backlighted, 4 languages 

� Display shows actual temperature, time and date 

� Lets you view all recorded values any time 

� Easy operating by 3 keys 

� Digital inputs e.g. for door-contact or other messages * 

� Isolated alarm relay and built-in buzzer * 

� Four display languages selectable: 

german, english, french, dutch 

* (not type 404 S, 2404S) 

Technical Manual 

Temperature- & Humidity Recording System 

MiniMEP 

Nr. 5310965-00/20 E 

02.07.96 12:30 

Room 1 -23.5°C 

Please note Operating and 

Safety Instructions on page 12 !

page 2 

Note 

The temperature recording system MiniMEP corresponds to 

the requirements of the european standard EN 12830. 

Please note that according to the standard EN 13486, the 

end-user is bound to a continuous check of the units for 

operation and accuracy. 

General Description 

The MiniMEP data logger series is developed for paperless 

recording of temperature resp. humidity values and to store them 

for a long period of time. 

The unit measures temperatures by high accurate platinium 

sensors and stores the values in a non-volatile memory for 

unlimited time. 

Without additional utilities, the user is able to recall every 

recorded value with its date, time and position designation. 

If this memory is full, the oldest recorded values will be erased to 

get space for the newest values. 

The units are available in 2 different housings and memory sizes 

(see overview below). 

A special version (MiniMEP 434 A/534 A) can record 2 temperature 

values and the values of two 4...20 mA-humidity transmitters. 

Contents 

Technical Manual MiniMEP Data Loggers 

page 

General Description ............................................. 2 

Operating ............................................................. 3 

Programming Access Authorization, 

Reset Error Messages, Buzzer/Relay Test, 

Error Messages / -codes 

Functional Description ......................................... 4 

Programming designations .............................. 4 

Parameter listing (2)434A, (2)534A .................... 5 

Parameter listing (2)404S, (2)424A, (2)524A ..... 6 

Connection, Versions 4xx.................................... 7 

Connection, Versions 5xx.................................... 9 

Dimensons ........................................................... 10 

Processing of Data, PC connection, 

Unlock of recording system ................................. 11 

Installation ........................................................... 12 

Cable lenghts ................................................... 12 

Connection and Safety Notes ....................... 12 

Accu operation ............................................... 12 

Start-up ................................................................ 12 

Technical Data / Accessories .............................. 13 

CE-Statement of Conformity ............................... 14 

Appendix: Drilling template, calibration and start-up report 

Type- Housing Inputs Recording Digital Alarm Limits LC- Input for Memory Cap- Supply 

Overview Range inputs Alarm relays Display additional- acity with 15 

Accu min. interval 

MiniMEP 404 S wall mounting 4x temp. -110/+600°C -- -- X -- 366 days 230V 

MiniMEP 2404 S wall mounting 4x temp. -110/+600°C -- -- X -- 366 days 115V 

MiniMEP 424 A wall mounting 4x temp. -110/+600°C 3x 230V 1x SPDT X X appr. 6 years 230V 


MiniMEP 424/12V wall mounting 4x temp. -110/+600°C 3x 12VDC 1x SPDT X X appr. 6 years 12V 


2x humidity 0/100% r.F. 



MiniMEP 524 A panel mounting 4x temp. -110/+600°C 3x 230V 1x SPDT X X appr. 6 years 230V 





2x humidity 0/100% r.F.

Technical Manual MiniMEP Data Loggers page 3 

Operating 

Organisation of the display pages 

All parameters and values are partitioned on four 

sensor pages and a parameter page. The sensor 

pages contain the recorded values. The parameter 

page contains setpoints, times, error messages, 

etc. Operating the MiniMEP is very easy by three 

keys. Key 'P' changes the pages, with the up/down 

buttons you are able to scroll the lists or to change 

values. 

Read off recorded values 

02.07.96 12:27 

Sensor 1 -23.5°C 

Every push on button 'P' brings you to the 

page of the next sensor. 

02.07.96 12:15 

sensor 1 -23.5°C 

After power-up, the 

display shows date, 

Current time and value 

of sensor 1. 

Basic settings / Reading Error messages 

02.07.96 12:15 


serial no 

000000 

02.07.96 12:15 


02.07.96 12:00 


02.07.96 11:45 


02.07.96 12:15 

sensor 3 21.5°C 

Holding the button 'P' for more than 1 sec. brings you to the parameter page. Select parameter 

by the 'up/down' keys (see parameter descriptions on the next pages). Holding the 'P' button 

again brings you back to the sensor 1 page. 

02.07.96 12:15 


Programming / Access Authorization 

� Select desired parameter by the 'up/down' keys 

� Press 'P'-key short 

� An access code is 

requested 

� Enter access code by 

'up/down' keys 

Pages 

Overview 

The code is related from the time of the day as the sum of the hour (0 to 23) plus ‘10’. 

Example: At 9:35 a.m. the code is 9 + 10 = 19. 

At 9:35 p.m. the code would be 21 + 10 = 31 

� Notation of parameter flashes 

� Change value by the 'up/down' keys 

� Press 'P'-key short 

� Select new parameter if necessary 

If you have pressed the 'P' key longer than 1 second or no key is pressed for about 1 minute 

after entering the code, the display will switch back to the actual value of sensor 1. 

By pushing the 'up/down' keys you 

can select the desired values. 

Every keypress brings you to the 

next recorded value. Holding an 

'up' or 'down' key effects an 

automatic, accelerating scrolling. 

P P P 

P 

P P 

Identification 1 

entry : > 0 < 

Error codes 

If a failure occurs, the MiniMEP generates an 

error message by de-activating the alarm relay 

and switching ON the internal buzzer. 

Additionally, the display starts flashing to get 

your attention. Each error message has a 

priority level. If several messages occur, the 

messages with higher priority are displayed on 

top, messages with lower priority are blinded 

by the higher ones. 

x34-types only: If the current inputs 

get > 20mA or if they are not connected: 

display shows 100%, no error 

message. 

P 

01.07.96 15:00 

01.07.96 14:45 

01.07.96 14:30 

01.07.96 14:15 


01.07.96 15:00 

01.07.96 14:45 

01.07.96 14:30 

01.07.96 14:15 


02.07.96 12:15 


P P 

01.07.96 15:00 

01.07.96 14:45 

01.07.96 14:30 

01.07.96 14:15 


01.07.96 15:00 

01.07.96 14:45 

01.07.96 14:30 

01.07.96 14:15 


push for longer 

than 1 second 

P P 

correction 

probe selection 

MINIMEP 

serial no 

000000 

02.07.96 12:15 


Reading the Current Error 

While the display flashes, you can read the 

current error by holding 

Reset of Error Messages 

If an error message occurs, 

push shortly 

Buzzer and relay will be reset, but will come 

back after the set alarm repetition time. If an 

error with a higher priority occurs, it will come 

at once. 

Buzzer / Relay Test 

To test, if the internal buzzer and the alarm 

relay works correctly, 

P 

push and 

for > 1 sec. 

Then parameter (actual error) will be displayed 

at the same time while the actual values are 

displayed. The buzzer sounds and the relay 

switches off as long as you press the keys. 

'——' ................... no error 

'Poff' .................... main power was switched off 

prio.1 ........... 'al1' ...................... digital input 1 (Default=al1) was/is not connected 

prio.2 ........... 'al2' ...................... digital input 2 (Default=al2) was/is not connected 

prio.3 ........... 'door' ................... digital input 3 (Default=door) was/is not connected 

prio.4 ........... probe 1, 'p-break' (sensor is broken) or 'p-short' (sensor has short circuit) 




prio.8 ........... 'ot 1' .................... sensor 1 has increased the warning limit 

prio.9 ........... 'ot 2' .................... sensor 2 has increased the warning limit 

prio.10 ......... 'ot 3' .................... sensor 3 has increased the warning limit 

prio.11 ......... 'ot 4' .................... sensor 4 has increased the warning limit 

prio.12 ......... 'accu' ................... accu operation after mains is lost 

prio.13 ......... 'dch.' .................... accu discharged or defect 

prio.14 ......... 'ut 1' .................... sensor 1 has decreased the warning limit 




'prb1' to 'prb4' ..... an error is occured on sensor x

page 4 

Functions 

Error memory 

The last 6 occured errors will be stored with error code, name, date and time 

and can be read on the parameter page (last error 1 - last error 6). 

Clear identification 

Every MiniMEP has its own, individual serial number. This number is located 

both on type label and in memory. You can read the number by scrolling 

through the parameter page. 

Recording 

The MiniMEP records sensor values with the selected storage interval 

(parameter 'recording') and stores them into its non-volatile memory. If a 

value leaves the specified range, display shows 

'> +600°C' (+1112°F) resp. '< -110°C' (-166°F). The types 502/504 show 

">+25°C (+77°C) resp.


Parameter Page MiniMEP (2)434 A/ (2)534 A, Temperature-/Humidity Recording. (Default values are factory set) 

Parameter name Description Range Default value Your value 

serial number individual serial number for clear idenfication of the unit -- -software 

version no. of the software + additional info Add. info: "pro" = unit is unlocked for use with "CV-Scheduler" 

MiniMEP shows type of unit, quantity and kind of probe inputs 

recording storage interval in minutes 1...6,10,12,15,20,30,60 min. 5 min. 

unit physical unit of all temperature values °C(elsius), °F(ahrenh.) °C 

(°F always in 0,2°F steps) 

(transm 1) corr. 1 the last four corrections of this input with time, -6% bis +6% 0% 

to date and offset value 

(transm 1) corr. 4 

(transm 1) on/off if you don't want to use input 1, switch it off here off / on on 

transm 1 L-Limit humidity low limit transmitter 1 0,0% ... 100,0% 0% 

transm 1 H-Limit humidity high limit transmitter 1 0,0% ... 100,0% 100% 

transm 1 delay if this delay is run down, an alarm message will be generated 0:01 ... 4:00 h:min 1:00 h:min 

name transm 1 individual name for this probe input (max. 8 characters) see table transmitter 1 

(probe 2) corr. 1 the last four corrections of this input with time, 


(probe 2) corr. 4 

(probe 2) on/off if you don't want to use probe 2, switch it off here off / on off 

probe 2 L-Limit undertemperature setpoint probe 2 -160..+850°C/-256..+1562°F -160°C (-256°F) 

probe 2 H-Limit overtemperature setpoint probe 2 -160..+850°C/-256..+1562°F +850°C (+1562°F) 

(-256...+1562°F) 

probe 2 delay if this delay is run down, an alarm message will be generated 0:01 ... 4:00 h:min 1:00 h:min 

name probe 2 individual name for this probe input (max. 8 characters) see table probe 2 

(transm 3) corr. 1 the last four corrections of this input with time, -6% bis +6% 0% 


(transm 3) corr. 4 

(transm 3) on/off if you don't want to use input 3, switch it off here off / on off 

transm 3 L-Limit humidity low limit transmitter 3 0,0% ... 100,0% 0% 

transm 3 H-Limit humidity high limit transmitter 3 0,0% ... 100,0% 100% 

transm 3 delay if this delay is run down, an alarm message will be generated 0:01 ... 4:00 h:min 1:00 h:min 

name transm 3 individual name for this probe input (max. 8 characters) see table transmitter 3 









alarm repeat alarm repetition time after a reset with a failure still present off, 0:01 ... 4:00 h:min off 

accu alarm mess. accu alarm message if mains voltage fails on, off on 

DI alarm w. accu alarms from digital inputs allowed while accu operation on, off on 

(digital inputs) here the digital inputs can be switched on or off al1 al2 door off off off 

1(al1) 2(al2) 3(door) off off off 

........to........ 

on on on 

delay door time delay for digital input #3 0:00 ... 4:00 h:min 0:00 h:min 

L/inp. 3 (door) individual name for digital input #3 see table door 

delay al2 time delay for digital input #2 0:00 ... 4:00 h:min 0:00 h:min 

L/inp. 2 (al2) individual name for digital input #2 see table al2 



actual time can be correctedround about 90 minutes only h:min:sec factory set 

actual date cannot be corrected factory set 

summer/winter regulation for the summer / winter shifting EU since '96, NO EU since '96 

actual error "see failure codes" 

last error 1 the last 6 errors date, time, error 

to 

last error 6 date, time, error 

DDC-baudrate communication speed with PC-software Baud: 9600, N ,8 ,1 

1200 - 57600 

begin print date/time of the first value that should be printed out 

end print date/time of the last value that should be printed out 

print start with key 'arrow up', break with 'arrow down' begin print - end print 

Sprache / language display language german, english, 

french, netherlands 

adress (in network) adress of the unit within a network 0 -78 78

page 6 


Parameter Page MiniMEP (2)404S, (2)424A, 424/12V, (2)524A (Default values are factory set) 

Parameter name Description Range Default value Your value 

serial number individual serial number for clear idenfication of the unit -- -software 

version no. of the software + additional info Add. info: "pro" = unit is unlocked for use with "CV-Scheduler" 

MiniMEP shows type of unit, quantity and kind of probe inputs 

recording storage interval in minutes 1..6,10,12,15,20,30,60 min. 5 min. 

unit physical unit of all temperature values °C(elsius), °F(ahrenh.) °C 

(°F always in 0,2°F steps) 




(probe 1) on/off if you don't want to use probe 1, switch it off here off / on on 

probe 1 L-Limit undertemperature setpoint probe 1 -160...+850°C -160°C (-256°F) 

probe 1 H-Limit overtemperature setpoint probe 1 -160...+850°C +850°C (+1562°F) 



























alarm repeat alarm repetition time after a reset with a failure still present off, 0:01 ... 4:00 h:min off 

accu alarm mess. accu alarm message if mains voltage fails on, off on 

DI alarm w. accu alarms from digital inputs allowed while accu operation on, off on 

(digital inputs) here the digital inputs can be switched on or off al1 al2 door off off off 

1(al1) 2(al2) 3(door) off off off 

........to........ 

on on on 

delay door time delay for digital input #3 0:00 ... 4:00 h:min 0:00 h:min 

L/inp. 3 (door) individual name for digital input #3 see table door 





actual time can be correctedround about 90 minutes only h:min:sec factory set 

actual date cannot be corrected factory set 

summer/winter regulation for the summer / winter shifting CE since '96, NO CE since '96 

actual error the current error "see failure codes" 

last error 1 the last 6 errors date, time, error 

to last error 6 

DDC-baudrate communication speed with PC-software or network Baud: 9600, N ,8 ,1 

1200 - 57600 

begin print date/time of the first value that should be printed out 

end print date/time of the last value that should be printed out 

print start with key 'arrow up', break with 'arrow down' begin print - end print 

Sprache / language display language german, english, 

french, netherlands 

adress (in network) adress of the unit within a network 0 -78 78 

The framed parameters are not available in types 404S and 2404S


Wiring MiniMEP (2)404S, (2)424A 

ELREHA 

MiniMEP 

P 

1 2 3 4 5 6 7 8 9 

Mains phase 230V (US=115V) 

Mains neutral 

alrm relay N/C contact 

alarm relay N/O contact 

alarm relay common 

L/report input 1 (al1) mains ph. 

L/report input 2 (al2) mains ph. 

L/report input 3 (door) mains ph. 

PE 

- The terminals 10 and 11are valid 

only for MiniMEP's with option 'A' 

- Terminals 3 to 8 not available in 

type 404 S 

1 2 3 4 5 6 7 8 9 

Wiring the probes / sensors 

10 12 14 16 18 20 22 24 

11 13 15 17 19 21 23 25 

10 Accu + 

11 Accu - 

12 RS 485 NDO 

13 RS 485 DO 

14 Probe 1 

15 Probe 1 com. 

16 Probe 2 


18 Probe 3 


20 Probe 4 


22 n.c. 

23 RxD (RS 232) 

24 GND (RS 232) 

25 TxD (RS 232) 

10 12 14 16 18 20 22 24 

11 13 15 17 19 21 23 25 

Wiring MiniMEP 424/12V 

ELREHA 

MiniMEP 

P 

1 2 3 4 5 6 7 8 9 

Supply voltage +12V DC 

Supply voltage -12V DC 

alarm relay N/C contact 

alarm relay N/O contact 


report input 1 (al1) +12V DC 

report input 2 (al2) +12V DC 

report input 3 (door) +12V DC 

RS-232 Interface MiniMEP 4xx 

1 2 3 4 5 

connector SUB-D 9 male 

RS-232-interface connector 

6 

10 12 14 16 18 20 22 24 

11 13 15 17 19 21 23 25 

7 8 9 

10 n.c. 

11 n.c. 

12 RS 485 NDO 

13 RS 485 DO 

14 Probe 1 


16 Probe 2 


18 Probe 3 


20 Probe 4 


22 n.c. 

23 RxD (RS 232) 

24 GND (RS 232) 

25 TxD (RS 232) 

RxD (data in) 

TxD (data out) 

GND 

These ports are also connected to the screw 

terminals 23-25. 

They may not be connected at the same time

page 8 

Wiring MiniMEP (2)434 A 

ELREHA 

MiniMEP 

P 

1 2 3 4 5 6 7 8 9 

mains phase 

mains neutral 

alarm relay N/C 

alarm relay N/O 


L/input 1 (al1) 230V 

L/input 2 (al2) 230V 

L/input 3 (door) 230V 

PE 

1 2 3 4 5 6 7 8 9 

don't remove 

external resitors !! 

If humidity transmitters are used, 

they must be supplied by an 

external AC adaptor. 

This example shows an SV 401 

adaptor supplying two FF 2520 

transmitters. 

don't remove external resistors !! 

10 12 14 16 18 20 22 24 

51R 

51R 

11 13 15 17 19 21 23 25 

10 12 14 16 18 20 22 24 

51R 

51R 

11 13 15 17 19 21 23 25 

10 accu + 

11 accu - 

12 RS 485 NDO 

13 RS 485 DO 

14 + input 1 4/20mA 

15 - input 1 4/20mA 

16 probe 2 

17 probe 2 com. 

18 + input 3 4/20mA 

19 - input 3 4/20mA 

20 probe 4 

21 probe 4 com. 

22 n.c. 

23 RxD (RS 232) 

24 GND (RS 232) 

25 TxD (RS 232) 

1 2 3 4 5 6 

~ 14V ~ +8V +20V GND 

ELREHA 

Netz 

SV 401 

~ ~ 

A B 

+ 15-32VDC 

+ 4-20mA 

+ 0-10V 

Netz 

230V 


FF 2520 FF 2520 

+ 15-32VDC 

+ 4-20mA 

+ 0-10V


Connections 

MiniMEP 5xx 

20 21 22 23 24 

MiniMEP 500 

Netzteil 

PE 

Netz N 

Netz L 

1 2 

3 

4 

5 

25 26 27 28 29 30 31 

6 

L/Eing. NK 

7 

L/Eing. TK 

8 

12V 

L/Tür 

9 

zum Bedienteil 

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 

Connection of humidity 

transmitters to a 

MiniMEP (2)534 A 

20 21 22 23 24 

MiniMEP 500 

Power Unit 

PE 

Mains N 

Mains Line 

1 2 

1 2 

3 

4 

5 

* 

32 33 34 35 36 37 38 

28 29 30 31 32 33 34 35 36 37 38 

25 26 27 28 29 30 31 

6 

L/Input 1 

L/Input 2 

L/door 

7 

8 

12V 

9 

to controller unit 

ELREHA 

3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 

* 

32 33 34 35 36 37 38 

28 29 30 31 32 33 34 35 36 37 38 

ELREHA 

If humidity transmitters are used, they must be 

supplied by an external AC adaptor. 

This example shows an SV 401 adaptor supplying 

two FF 2520 transmitters. 

38 

37 

36 

35 

34 

33 

32 

31 

30 

F1 

F2 

F3 

10 

11 

12 

13 

14 

15 

16 

17 

Schirm nur an der Bediengerätseite auflegen 

F4 

RS232 

5 

4 

3 

2 

1 

9 

6 7 8 

RxD 

TxD 

GND 

NDO 

DO 

PE 

18 

19 

20 

21 

22 

23 

Terminals 28 and 29 are only valid for 

type 524 A. 

* Standard types (without "A") don't 

need the cables between terminals 37 

and 38. 

connected shielding at controller unit only 

38 

37 

36 

35 

34 

33 

32 

31 

30 

S1 

S2 

S3 

RS232 

10 

11 

12 

13 

14 

15 

16 

17 

18 

19 

20 

21 

22 

23 

S4 

5 

4 

3 

2 

1 

9 

6 7 8 

RxD 

TxD 

GND 

NDO 

DO 

PE 

FF 2520 

+ 15-32VDC 

+ 4-20mA 

+ 0-10V 

RS-232-interface connector 

1 2 3 4 5 

6 7 8 9 

RxD (data in) 

TxD (data out) 

GND 

Stecker SUB-D 9-polig male 

These ports are also 

connected to the screw 

terminals 18-20. 

They may not be connected 

at the same time 

1 2 3 4 5 6 

~ 14V ~ +8V +20V GND 

ELREHA 

Netz 

FF 2520 

SV 401 

+ 4-20mA 

+ 0-10V 

Netz 

230V 

~ ~ 

A B 

+ 15-32VDC

page 10 

Dimensions of MiniMEP 4xx types 

186 (7.32) 

Dimensions/Terminals of MiniMEP (2)524 A, (2)534 A Operating Unit 

ELREHA 

131 (5.16) 

P 

96 

MiniMEP 

Dimensions/Terminals of MiniMEP (2)524 A, (2)534 A Power Unit 

20 21 22 23 24 

MiniMEP 500 

Netzteil 

PE 

Netz N 

Netz L 

1 2 

3 

4 

ELREHA 

5 

25 26 27 28 29 30 31 

6 

160 (6.3) 

130 (5.12) 

L/Eing. 1 NK 

L/Eing. 2 TK 

7 

8 

MiniMEP 

P 

12V 

96 

9 

105 

32 33 34 35 36 37 38 

zum Bedienteil 

28 29 30 31 32 33 34 35 36 37 38 

L/Ein. 3 

Tür 

89,5 

5 4 3 2 1 

9 8 7 6 

ELREHA 

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 

72,5 

63 

47 

63 

93 

145 (5.71) 

10 (.39) 

8 

60 (2.36) 

F1 


105 (4.13) 

Verbindungen zum Netzteil 

10 

38 

11 

37 

12 

36 

13 

35 

14 

34 

15 

33 

16 

32 

17 31 

18 RxD 30 

F2 

F3 

59 

39 

26 

F4 

35 

RS232 

4 5 

3 

2 

1 

9 

8 

7 

6 

TxD 

GND 

NDO 

DO 

PE 

19 

20 

21 

22 

23


Processing of recorded data / Unlock unit for use with PC-Software 

The values recorded by the MiniMEP can be retrieved via its 

interfaces and processed by PC-Software. Here are the most 

important szenarios in practise: 

• Networking together with other controllers 

The MiniMEP is connected to a controller network via its RS- 

485-interface which allows remote access from a host. In 

this case, each unit on the bus gets an individual address 

within 1 and 78 (Parameter 'address' on parameter page). 

• Direct PC connection 

As a low cost alternative for a serial printer, a PC can be 

connected to the RS-232-interface. 

• Direct PC connection of several MiniMEP 

Electrical connection must be done as described above via 

RS-485 interface. The PC must be equipped with an RS-485interface, 

or an Interface Converter of the series SSC must be 

used. 

Connection of several MiniMEP / controller units via RS-485 interface and SSC converter 

+ � � �L EI E� � 

� @ A H 

+ 8 �5 ? D A @ K �A H 

COM-interface 

(used cable is 

"PC-SSC/SUB-D") 

Interface Converter 

SSC 8022 

DO 

RS-232 

Connection of a single MiniMEP via RS-232 interface 

+ � � �L EI E� � 

� @ A H 

+ 8 �5 ? D A @ K �A H 

COM-interface 



GND 

NDO 

1 

6 

+13V 

9 pole 

female 

Connection of a single MiniMEP to a PC with USB interface 

+ � � � 8 EI E� � � @ A H 

+ 8 �5 ? D A @ K �A H 

USB converter 

USB001 

9 

8 

7 

6 

5 

4 

3 

2 

1 

9 pole 

female 

9 

8 

7 

6 

5 

4 

3 

2 

1 



Gnd 

out 

in 

Gnd 

out 

in 

PC-Software 

If the MiniMEP is connected to controller network, the software 

"COOLVision" is used normally. If a PC should operate with one 

or more MiniMEP exclusively, the software "CV-Scheduler" is 

recommended. 

9 pole 

female 

5 

9 

4 

8 3 

7 2 

6 

8 

7 

6 

Unlock unit for use with PC-Software "CV-Scheduler" 

If a MiniMEP is intended to operate with software "CV- 

Scheduler", an unlock code must be entered while startup. 

You get this unlock code with the software, please see 

software manual for further information. 

Without this code, retrieve and processing of data with the 

software is impossible. 

How to check if your MiniMEP is unlocked for CV-Scheduler 

software: 

- Access parameter page, 

- Select parameter 'software', 

- If the unit is unlocked, you will find the additional info 

"pro" behind the software version. 

1 

9 pole 

female 

9 

5 

4 

3 

2 

1 

GND DO NDO GND DO NDO 

MiniMEP MiniMEP 

or 

other 

controller 

PE PE 

GND (alternative terminal 24) 

TxD (alternative terminal 25) 

RxD (alternative terminal 23) 

MiniMEP 4xx 

GND (alternative terminal 24) 

TxD (alternative terminal 25) 

RxD (alternative terminal 23) 

MiniMEP 4xx 

Electrical 

Cabinet

page 12 

Sensor - Installation 

Temperature Sensors 

With the three offered sensor types TF 501 5M, TF 501 10M and 

TF 501 15M the MiniMEP is able to work within the specified 

accuracy range. 

Attention ! 

TF 501 sensor versions are specified up to 80°C only. 

To measure higher temperatures, please use another 

sensor type. 

Cable length 

The cable can be shortened every time, if it must be extended 

please note the following: 

� If the resistance of the additional terminal is less than 

0,1 ohms, you can extend with a shielded cable type as 

shown in this table. 

cable diameter 0,5mm² 1mm² 1,5mm² 

TF 501/5M < 20m < 40m < 60m 

TF 501/10M < 15m < 30m < 45m 

TF 501/15M < 10m < 20m < 30m 

Accu - Operation 

The MiniMEP types (2)424 A, (2)524 A and (2)534 A are equipped 

with terminals for an external Lead Accu. The integrated charge 

controller cares for a slow but sparing charge of the accu while 

the MiniMEP works with mains voltage. 

Start-up 

Notes: 

• Connect accu first, if the MiniMEP is ready for 

operation with mains voltage. 

• To prevent the accu from deep-discharge, 

disconnect accu or switch ON the MiniMEP with 

mains voltage if the unit has been shut-down by 

the charge monitoring function after some hours 

of accu-operation. 

• Charge process may last up to some days. 

When voltage is applied to the controller, date, current time and 

actual sensor input 1 value is displayed. 

By pressing any key the displays backlight turns on. 

� Switch ON the needed sensor inputs on parameter page 

� Check the displayed temperatures refering to a calibrated 

thermometer at the position of the sensor. Register the 

results on the start-up checklist ('Prüfprotokoll', section 2). 

� Select storage interval (parameter 'recording') 

� If desired, you may fix a name for each sensor or digital 

input (see page 3). 

� Set the parameters of the additional functions now, if they 

are necessary. 

CONNECTION & SAFETY INFORMATION 


The guarantee will lapse in case of damage caused by failure 

to comply with these operating instructions! We shall not be 

liable for any consequent loss! We do not accept liability for 

personal injury or damage to property caused by inadequate 

handling or non-observance of the safety instructions! The 

guarantee will lapse in such cases. Servicing or repair work 

may only be carried out by a specialist workshop. 

• Limit of Application: This product is not designed nor 

manufactured for use in equipment or systems that are 

intended to be used under such circumstances that may 

affect human life. For applications requiring extremely 

high reliability, please contact the manufacturer first. 

• Electrical installation and putting into service must be 

done from authorized personnel. 

• Please note the local safety instructions ! 

• Before installation: Check the limits of the unit and your 

application. Before starting up we recommend you to 

read the manual for use, since only by doing so you can 

avoid damage or malfunction and you will benefit all the 

advantages offered by this product. 

• During installation and wiring never work when the 

electricity is not cut-off ! 

• Mounting the unit close to power relays is unfavourable in 

case of the electro-magnetic interference. 

• Before applying voltage to the unit: 

Make sure that all wiring has been made in accordance 

with the wiring diagram in this manual. 

Check, if the supply voltage corresponds to the value 

printed on the type label. 

• Connect ‘PE’ terminal carefully to ground, otherwise the 

internal noise filter will not work. 

• Respect the environmental limits for temperature and 

humidity. Outside these limits malfunctions may occur. 

• Never operate unit without housing. 

• For sensor cables, use shielded types only. Don’t install 

them in parallel with high-current cables to prevent 

inductive interference. 

• TF-type sensors are are not designed for being immersed 

in water for a long period of time (not pressure-proof). In 

such a case, always use dip-fittings. 

• Take care that the wiring of interface lines meets the 

requirements 

Please note the rule EN 13486, which describes 

the responsibility of the user for calibration of 

the unit at regular intervals.


Technical Data 

Unit is suitable for storage (S), ambient conditions (A), 

accuracy level (1) 

Supply voltage ................... 230V / 50-60Hz 

US-versions (2)xxx ......... 115V / 60Hz 

Version 424/12V ............ 12V DC 

Power consumption ........... app. 5VA max. 

Ambient temperature ......... 0...+50°C (32...+122°F) 

Inputs ................................. max. 4 x TF 501 

Inputs MiniMEP x34 A ....... 2x 4...20mA, 2x TF 501 

Digital- (Report-) inputs ..... 3x mains phase with adjustable 

name and time delay 

Version 424/12V ............ 3x +12V DC 

Calibration ......................... factory set, maintenance free 

Display resolution .............. -160...+60°C = 0,1K 

-256...+140°F = 0,2°F 

Protocol resolution............. -110...-50°C = 0,5K 

-50...+100°C = 0,1K 

+100...+150°C = 0,5K 

+150...+300°C = 1,0K 

+300...+600°C = 2,0K 

-166...-58°F = 1°F 

-58...+212°F = 0,2°F 

+212...+302°F = 1°F 

+302...+572°F = 1,8°F 

+572...+1112°F = 3,6°F 

0...100% = 0,1% 

Storage intervals ............... 1/2/3/4/5/6/10/12/15/20/30/60 min. 

Outputs .............................. Buzzer, 1x alarm relay (SPDT), 

isolated, 4A / cos phi=1/250V 

Interfaces ........................... RS 232, RS 485 

Accu interface .................... Charge controller for 1,3 Ah Lead Accus 

(not types 404 S, 2404 S, 424/12V) 

Data memory ..................... see type overview 

Real time clock .................. automatic summer/winter shift, 

can be disabled 

Data storage ...................... unlimited, clock backup typ. 10 years 

Housing 

4xx-types ........................ plastic, wall mounting, IP 54 

5xx-types ........................ plastic, panel mounting, 

IP 54 from front 

Supplied accessories (2)4xx types 

� This manual 

� 1 x Fitting PG 9 

� 1 x Fitting PG 11 

� 1 x Fitting PG 13,5 

� 3 x Screws 4 x 40 

� 3 x Dowels 6mm 

Not supplied accessories 

Temperature Sensors 

� TF 501/5M, diam. 6 mm, 5 meters shielded cable 

TF 501/10M, diam. 6 mm, 10 meters shielded cable 

TF 501/15M, diam. 6 mm, 15 meters shielded cable 

Attention! only suitable up to 80°C ! 

Humidity Sensors 

� FF 2520, humidity transmitter with 4/20mA output, must be 

supplied by an external AC-adaptor. 

Please note installation information ! 

� MiniMEP PC-software "CV-Scheduler" 

� External Accumulator or Accu-set 

� PC-cable (see text)

page 14 

(copy) 

EG-Statement of Conformity 


We state the following: When operated in accordance with the technical manual, the criteria have been met that are outlined in 

the guidelines of the council for alignment of statutory orders of the member states on electro-magnetic consistency (89/336/EWG) and the Low Voltage 

Directive (73/23/EWG) as amended by (93/68/EWG). This declaration is valid for those products covered by the technical manual which itself is part of 

the declaration. To meet the requirements, the currently valid versions of the relevant standards have been used. 

This statement is made from the manufacturer / importer by: 

ELREHA Elektronische Regelungen GmbH 

D-68766 Hockenheim, Germany 

Werner Roemer, Technical Director 

www.elreha.de Hockenheim.............12.09.2005...................................................... 

(name / adress) city date sign 

This manual has been set up with care and to our best knowledge, but mistakes are still possible. Technical details, especially the software, can 

be changed without notice. Please note that this manual is only valid for controllers containing the software-version shown on page 1. This versionnumber 

is also displayed in the parameter page. If you have still problems or difficulties or questions please don´t hesitate asking our technical 

support. Called trademarks are properties of their companies. 

Set up : 17.5.06, tkd/jr checked: 18.5.06, ek/jk approved: 18.5.06, mv/sha

Drilling template MiniMEP x422 / x424 

Maßstab 1:1 

scale 1:1 

Bohrer/Drill Ø 6mm (.24) 

7mm (.27) 

116mm (4.57) 

Bohrer/Drill Ø 6mm (.24) 

65mm (2.56) 

155 (6.1) 

11 

(.43) 

163,5 (6.42)

Minimep - Elreha

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