165-072011 THCD-100 Power Supply Page 6 of 28
2.3. Interface Socket Pin out – Miniature 15 Pin 'D' Type 1 For RS232 only, connect only the pins designated in bold font.
2 For RS485 only, connect only the pins designated in normal font.
See section 4 for instructions on changing the serial protocol.
Pin Number Designation
1 Analog Output
2 Relay 2 Common
3 Relay 2 Normally Open contact
4 Relay 2 Normally Closed contact
5 0V (Signal Ground)
6 External Setpoint Return
7 N/C
8 External Setpoint
9 N/C
10 0V (Signal Ground)
11 TTL Input – Disable Menu
12 TTL Input – Disable Zero
13 Relay 1 Common
14 Relay 1 Normally Open contact
15 Relay 1 Normally Closed contact
Pin Number Designation 1 2
1 RS485 Tx +
2 RS232 Rx
3 RS232 Tx
4 RS485 Tx –
5 Common
6 RS485 Rx +
7 RS485 Rx –
8 N/C
9 Common