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<strong>485HF9</strong><br />
RS485/422 to RS232 Converter<br />
RS485/RS422 to RS232 Converter<br />
Model <strong>485HF9</strong><br />
- Industry standard serial converters<br />
- UK designed and manufactured<br />
- Automatic turnaround feature on MA485F9<br />
- Automatic data rate detection<br />
- 485 Screw terminal connectors for easy wiring<br />
- Selectable 120 Ohm termination resistor<br />
- Optional DC power supply 9-12 V
Technical Data<br />
Model <strong>485HF9</strong><br />
depress<br />
to<br />
change<br />
Logic input<br />
0<br />
Net<br />
Logic output<br />
1 2 3<br />
1 2 3<br />
Digital Amplifier + Setpoint<br />
DAS 72.1 Mark III<br />
1<br />
0 T<br />
2<br />
SET UP<br />
1.Zero 2.Span 3.Display 4.Filter 5.CLout 6.Input 1/2/3 7.Outp. 1/2/3 8.Data<strong>com</strong>.<br />
1.0/allow>0< 1.Set cal ´n´ 1.o/u limits ´n´ 1.fcut Hz 1.4mA=´n´ 1.Assign Key 1.SPoint´n´ 1.Baud rate<br />
2.Calibrate 2.Calibrate 2.Step*´n´ 2.Algorithm 2.20mA=´n´ 2.<br />
2.Hyst. ±´n´ 2.422/485<br />
3.Set mV/V 3.Set mV/V 3.Dec.point 3.Update rate 3.Base 3.<br />
3.Base 3.Address<br />
4.Disp.mV/V 4.Logic stats 4.Motion´n´ 4.Test I mA 4.Test 4.Test 4.Auto trnsm.<br />
Load cell 5Vdc < 80mA CL out RS422/485<br />
Isolated<br />
Logic Outputs<br />
Isolated<br />
Logic Inputs<br />
Isolated<br />
Power 11 -25Vdc<br />
Exc Sen Inp Inp Sen Exc 0-20mA Rx Rx Tx Tx<br />
1 2 3 <strong>com</strong> 1 2 3 <strong>com</strong><br />
+ + + - - - Io Gnd + - + -<br />
+ + 0 0<br />
T<br />
3<br />
4<br />
Model <strong>485HF9</strong> Non-isolated<br />
This model provides basic electrical signal level<br />
conversion from RS232 to RS422 or 4 wire RS485.<br />
For 2 wire RS485 applications we would re<strong>com</strong>mend<br />
using the MA<strong>485HF9</strong> below. Maximum baud rate 1<br />
Mbps. A suitable external power supply is available<br />
separately.<br />
0 VDC<br />
+12 VDC<br />
External PSU available separately<br />
Not Connected<br />
1<br />
2<br />
3<br />
4<br />
5<br />
6<br />
7<br />
-EN<br />
GND<br />
B<br />
A<br />
A’<br />
B’<br />
GND<br />
8 VDC<br />
MODEL<br />
<strong>485HF9</strong>CE<br />
To RS232 Port<br />
on Computer<br />
Model MA485H9 Non-isolated<br />
The ‘Magic’ converter features an automatic line turnaround facility allowing full duplex RS232 connections to<br />
connect directly to a half duplex 2 wire RS485 bus without a requirement for software based transmission<br />
control. Maximum baud rate 115 kbps. A suitable external power supply is available separately.<br />
depress<br />
to<br />
change<br />
Logic input<br />
0<br />
Net<br />
Logic output<br />
1 2 3<br />
1 2 3<br />
Digital Amplifier + Setpoint<br />
DAS 72.1 Mark II<br />
1<br />
0 T<br />
2<br />
T<br />
3<br />
SET UP<br />
4<br />
depress<br />
to<br />
change<br />
Logic input<br />
0<br />
Net<br />
Logic output<br />
1 2 3<br />
1 2 3<br />
Digital Amplifier + Setpoint<br />
DAS 72.1 Mark II<br />
1<br />
0 T<br />
2<br />
T<br />
3<br />
SET UP<br />
4<br />
1.Zero 2.Span 3.Display 4.Filter 5.CLout 6.Input 1/2/3 7.Outp. 1/2/3 8.Data<strong>com</strong>.<br />
1.0/allow>0< 1.Set cal ´n´ 1.o/u limits ´n´ 1.fcut Hz 1.4mA=´n´ 1.Assign Key 1.SPoint´n´ 1.Baud rate<br />
2.Calibrate 2.Calibrate 2.Step*´n´ 2.Algorithm 2.20mA=´n´ 2.<br />
2.Hyst. ±´n´ 2.422/485<br />
3.Set mV/V 3.Set mV/V 3.Dec.point 3.Update rate 3.Base 3.<br />
3.Base 3.Address<br />
4.Disp.mV/V 4.Logic stats 4.Motion´n´ 4.Test I mA 4.Test 4.Test 4.Auto trns.<br />
Load cell 5Vdc < 80mA CL out RS422/485<br />
Isolated<br />
Logic Outputs<br />
Isolated<br />
Logic Inputs<br />
Isolated<br />
Power 11 -25Vdc<br />
Exc Sen Sig Sig Sen Exc 0-20mA Rx Rx Tx Tx<br />
1 2 3 <strong>com</strong> 1 2 3 <strong>com</strong><br />
+ + + - - - Io Gnd + - + -<br />
+ + 0 0<br />
1.Zero 2.Span 3.Display 4.Filter 5.CLout 6.Input 1/2/3 7.Outp. 1/2/3 8.Data<strong>com</strong>.<br />
1.0/allow>0< 1.Set cal ´n´ 1.o/u limits ´n´ 1.fcut Hz 1.4mA=´n´ 1.Assign Key 1.SPoint´n´ 1.Baud rate<br />
2.Calibrate 2.Calibrate 2.Step*´n´ 2.Algorithm 2.20mA=´n´ 2.<br />
2.Hyst. ±´n´ 2.422/485<br />
3.Set mV/V 3.Set mV/V 3.Dec.point 3.Update rate 3.Base 3.<br />
3.Base 3.Address<br />
4.Disp.mV/V 4.Logic stats 4.Motion´n´ 4.Test I mA 4.Test 4.Test 4.Auto trns.<br />
Load cell 5Vdc < 80mA CL out RS422/485<br />
Isolated<br />
Logic Outputs<br />
Isolated<br />
Logic Inputs<br />
Isolated<br />
Power 11 -25Vdc<br />
Exc Sen Sig Sig Sen Exc 0-20mA Rx Rx Tx Tx<br />
1 2 3 <strong>com</strong> 1 2 3 <strong>com</strong><br />
+ + + - - - Io Gnd + - + -<br />
+ + 0 0<br />
120 Ohm Termination<br />
Resistor - Only fitted<br />
to the last device on<br />
the bus.<br />
+12 VDC<br />
0 VDC<br />
Set DAS72.1 Menu 8.2 to<br />
RS485 on all units<br />
1.2 KOhm Network<br />
Biasing resistors<br />
1<br />
2<br />
3<br />
4<br />
5<br />
6<br />
7<br />
8<br />
GND<br />
B<br />
A<br />
A’<br />
B’<br />
VDC<br />
GND<br />
To RS232 Port<br />
on Computer<br />
CE<br />
MODEL<br />
Magic 485F9<br />
RS232 connector<br />
RS485 connector<br />
Supply voltage<br />
Power connector<br />
Operating current<br />
Data rate<br />
DB9 female<br />
Screw terminal<br />
9 to 12Vdc<br />
Screw terminal<br />
100mA maximum<br />
115.2kbps (1Mbps on <strong>485HF9</strong>)<br />
Operating temperature 0 to +60°C<br />
Storage temperature -20 to +70°C<br />
Dimensions 67 x 43 x 20mm (67 x 53 x 20mm Magic 485)<br />
Weight<br />
60g<br />
DS-<strong>485HF9</strong>-1, 05/09<br />
Tel. +44 (0)1446 771185 Fax +44 (0)1446 771186<br />
Precision Load Cells<br />
Accessories and Mountings<br />
Measuring Instruments and Systems
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