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8) SETTINGS<br />
The communications interfaces are selected by means of a 3-pin DIP switch on the rear of the module.<br />
One – and only one – switch must be set to ON (down).<br />
ON Active interface Configuration<br />
1 Only V.24 interface Only one module connected to PC<br />
2 V.24 interface and fiber optic First module in ring (PC port)<br />
3 Only fiber optic Extension module in ring<br />
9) PIN ASSIGNMENTS<br />
PORTS<br />
Connector<br />
IEEE488<br />
24-pin socket<br />
Connector<br />
D-Submin<br />
15-pin socket<br />
Digital Analog<br />
PORT 1 PIN PORT 2 PIN<br />
OUTPUT 0 1 OUTPUT 0 1<br />
OUTPUT 1 2 OUTPUT 1 2<br />
OUTPUT 2 3 0V 3<br />
OUTPUT 3 4 (unused) 4<br />
OUTPUT 4 5 (unused) 5<br />
OUTPUT 5 6 0V 6<br />
OUTPUT 6 7 INPUT 1 7<br />
OUTPUT 7 8 INPUT 2 8<br />
INPUT 0 13 (unused) 9<br />
INPUT 1 14 (unused) 10<br />
INPUT 2 15 + 10V REF 11<br />
INPUT 3 16 (unused) 12<br />
INPUT 4 17 (unused) 13<br />
INPUT 5 18 INPUT 3 14<br />
INPUT 6 19 INPUT 4 15<br />
INPUT 7 20<br />
0V DC 11/12<br />
23/24<br />
24V DC 9/10<br />
21/22<br />
POWER SUPPLY<br />
The 24V DC power supply for EasyPort must be<br />
supplied externally and can either be fed via the<br />
ports or via 2 screw terminals located on the rear<br />
of the module.<br />
V.24 – data interface<br />
Connector Sub D 9-pin plug<br />
V.24 = PIN<br />
(unused)<br />
1<br />
Receive data RxD 2<br />
Transmit data TxD 3<br />
(unused)<br />
4<br />
Signal ground SGnd 5<br />
(unused)<br />
6<br />
(unused)<br />
7<br />
(unused)<br />
8<br />
(unused)<br />
9<br />
A commercially available 9-pin <strong>serial</strong> extension<br />
cable can be used for connection to the PC.<br />
1) SYSTEM DESCRIPTION<br />
EasyPort D8A<br />
<strong>Festo</strong> part number 193 930<br />
Data Sheet<br />
(Status 01.2000 Subject to modification)<br />
PROCESS MODELS<br />
Fiber-optic ring<br />
The EasyPort process interface implements bi-directional transmission of process signals between a real<br />
control process using low-voltage technology (24 VDC) and a PC. In order to rule out the possibility of the<br />
process affecting the PC, only electrically isolated interfaces (optocouplers or optical fibers) are used for data<br />
transmission between the individual EasyPort modules or the PC.<br />
Up to 8 EasyPort modules can be connected to a fiber-optic ring. No address settings are required – the system<br />
is self-configuring.<br />
The system is designed and optimised for training purposes, but can also be used outside this environment.<br />
2) FUNCTIONS<br />
The EasyPort D8A basic module has 8 digital and 4 analogue inputs as well as 8 digital and 2 analogue<br />
outputs.<br />
Following power-on test, the module is ready for operation and waits for initialisation by the PC or the<br />
upstream module. The address is assigned automatically in accordance with the module’s location in the ring.<br />
Module failure is detected by means of regular short status requests and can be handled by the program as<br />
long as transmission is not interrupted.<br />
Transfer of data to and from an EasyPort module is by means of single addressed read and write commands. A<br />
mode can also be selected which causes the EasyPort to automatically report all changes of its inputs to the<br />
PC.<br />
EasyPort D8A Data sheet as electronics, D-72663 Großbettlingen, Germany
3) SAFETY NOTES<br />
The indicated maximum voltages for the power supply and for the inputs and outputs of the EasyPort must<br />
not be exceeded. Under no circumstances should voltages in excess of 30 V be used. Electrical connections<br />
should only be made and broken with devices switched off. The device may only be used in systems which<br />
return automatically to a safe state when the power is switched off. The safety notes for the connected<br />
devices must also be observed.<br />
4) OPTICAL FIBERS<br />
The link between the PC and EasyPort process interface is by means of an electrically isolated V.24 interface.<br />
Expansion modules are linked via optical fiber. A white "RING OUT" port must always be connected to a<br />
black "RING IN" port. Up to 8 EasyPort modules can be connected in this way. Please carefully insert the end<br />
of the optical fiber all the way into the connection socket and secure the fiber by rotating the collar to the<br />
right.<br />
Individual optical fibers may be in the range of 0.3 to 5.0 meters. Use a sharp blade to cut the plastic optical<br />
fibers to the desired length.<br />
A simple tool for this purpose can be purchased from <strong>Festo</strong>:<br />
LICHTL.SCHNEID. SOE-LKS (part number 36 479)<br />
5) DRIVER SOFTWARE<br />
The Windows driver software EzDDE (PN 374 212) obtainable from <strong>Festo</strong> <strong>Didactic</strong> *) and EzOPC allows you<br />
to read signals in and out of your EasyPort simply using a Windows application. Data exchange takes place<br />
via the DDE or OPC data interface integrated into Windows. This allows any application program provided<br />
with such software interface (such as a STEP7 simulator, a visualization package such as InTouch, or Excel<br />
spreadsheet) to establish contact with the EasyPort. The software of <strong>Festo</strong> <strong>Didactic</strong> is explicitly designed for<br />
this communication e.g. FluidSIM® and Cosimir®.<br />
The EasyPort can be addressed from your own programs (for example in C, PASCAL or BASIC) with the<br />
commands PRINT, INPUT etc. in its CI (Command Interpreter) command language.<br />
*) <strong>Festo</strong> <strong>Didactic</strong> GmbH & Co. KG,<br />
PO Box 100710, D-73707 Esslingen, Germany, Phone +49 711 3467 0<br />
6) DISPLAYS (LEDs on top of module)<br />
SHORT<br />
If a short-circuit is detected at one of the outputs, the red SHORT LED lights. The outputs of the EasyPort are<br />
then switched off.<br />
This LED also lights during power-on of the module. It is switched off again during the course of the poweron<br />
test, before the output drivers are activated.<br />
STATUS<br />
The green STATUS LED has various statuses:<br />
- Flashing 1 Hz: Power-on condition, module not yet communicating<br />
- Pulsating: Module is addressed. The address is shown at intervals of two seconds by the<br />
number of times the LED is switched off.<br />
INPUTS 0 to 7<br />
Status display of the 8 digital inputs by green LEDs.<br />
OUTPUTS 0 to 7<br />
Status display of the 8 digital outputs by green LEDs.<br />
7 SEGMENT DISPLAY<br />
Display of the input/output voltage of the analogue part in Volts<br />
BUTTON SEL<br />
This button selects the analogue channel displayed on the 7 segment display.<br />
An LED line show the currently selected channel.<br />
7) TECHNICAL DATA<br />
EasyPort Process Interface, Basic module D8A<br />
Operating voltage 24 V DC +/- 10%<br />
Power consumption 3 VA<br />
Outputs 8 digital 24V / 2 analogue 0...10V<br />
Output load (max.) 0.3 A per digital output / 10mA per analogue output<br />
Short-circuit protection Yes<br />
Inputs 8 digital 24V / 4 analogue 0...10V<br />
Operating point of the digital input 12 VDC<br />
Hysteresis of the digital input 3 V<br />
Filter 10 ms<br />
Communications interface V.24, electrically isolated and fiber optic<br />
Optical fiber length 0.3 m to 5.0 m<br />
Protocol ASCII, 19.2 kBd<br />
Degree of protection IP20<br />
Immunity to interference Class 4 as per DIN/IEC 801/4<br />
Permissible ambient temperature<br />
operation/storage<br />
0 to 55 °C / 0 to 70 °C<br />
Dimensions in mm / inch (L x W x H) 162 x 148 x 36 / 7.38 x 5.83 x 1.41<br />
Weight in kg 0.65<br />
EasyPort D8A Data sheet as electronics, D-72663 Großbettlingen, Germany