Pin Assignments For A Db-9 Connector; Pin Assignments For A Screw Connector - Thermo Scientific APEX 100 User Manual

Pin Assignments for a DB-9 Connector

Here are the pin assignments for an RTU card equipped with a DB-9 connector.
Pin Name
1
2 RS232–TX
3 RS232–RX
4
5 GND
6 +5V
7 RS485 A (–)
8 RS485 B (+)
9

Pin Assignments for a Screw Connector

Here are the pin assignments for an RTU card equipped with a screw connector.
Pin Name
1 RS232–TX
2 GND
3 RS485 B (+)
4 RS485 A (–)
5 RS232–RX
6 Shield
Thermo Scientific APEX User's Guide
Function
Not connected
Transmit signal
Receive signal
Not connected
Signal ground
Power supply
Two-wire TX/RX lines
Two-wire TX/RX lines
Not connected
Function
Transmit signal
Signal ground
Two-wire TX/RX lines
Two-wire TX/RX lines
Receive signal
Cable shield
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