Specifications

1070 072 131-102 (96.08) GB
Hardware Description 2-9
2.6.5.2 20 mA Interface Signal Levels and Pin Assignments
The signal levels and connector pin assignments correspond to the VDE
Guidelines 2880, Page 2 for programmable logic controllers, process and
data interfaces (limit: max. 27 V blocking voltage). Dependent upon the
pin assignment, 20 mA interfaces enable active or passive operation, i.e.,
with or without power supply.
Line states: logical 1 --> 20 mA
logical 0 --> no current
20 mA active
Function Designation Pin no. Signal direction
Shield Shield *
Receive-data + PLC RxD + 12 <--
Receive-data - PLC RxD - 24
Transmit Data + PLC TxD + 13 -->
Transmit Data - PLC TxD - 25
Data Set Ready + DSR + 14 <--
Data Set Ready - DSR - 18
Reader Control + RDRCTL + 16 -->
Reader Control - RDRCTL - 21
Fig. 2-8 20 mA Interface — Pin assignment, active operation
* The shield is connected to the metallic shell of the D-SUB connectors.
Pins 9 (12 V in) and 10
(12 V out) must be jumpered for active mode.
20 mA passive
Function Designation Pin no. Signal direction
Shield Shield *
Receive-data + PLC RxD + 22 <--
Receive-data - PLC RxD - 12
Transmit Data + PLC TxD + 23 -->
Transmit Data - PLC TxD - 13
Data Set Ready + DSR + 11 <--
Data Set Ready - DSR - 14
Reader Control + RDRCTL + 19 -->
Reader Control - RDRCTL - 16
Fig. 2-9 20 mA Interface — Pin assignment, passive operation
* The shield is connected to the metallic shell of the D-SUB connectors.