Fairbanks FB2255 Series Instrument PC2255 PC Software Utility Program - Manual (Page 23)

Section 3: Serial Communication Wiring
01/13 23 51297 Rev. 1
3.2. TB4 Wiring connections, COM1 (A), COM2 (B), and COM2 (C)
*Port should be set to RS485.
3.3. TB5 Remote Switch Inputs
1 Ground
2 Ground
3 Ground
4 Print Connect to ground to perform programmed Print function
5 Tare Connect to ground to Tare off Gross weight
6 B/G Net Connect to ground to Select Gross/Tare displays
7 Zero Connect to ground to Zero Platform Weight
8 Units Connect to ground to change to alternate weight units
TB4 (A) RS232 RS485 RS422* PORT
1 Rx – Receive Data (–) RS485 RS422 (–) Rx COM1
2 Tx – Transmit Data (–) RS485 RS422 (–) Tx COM1
3 CTS – Clear-to-Send (+) RS485 RS422 (+) RX COM1
4 GND -- Ground GND GND COM1
5 RTS – Ready-to-Send (+) RS485 RS422 (+) Tx COM1
TB4 (B) RS232 RS485 RS422* PORT
1 Rx – Receive Data (–) RS485 RS422 (–) Rx COM2
2 TX – Transmit Data (–) RS485 RS422 (–) Tx COM2
3 CTS – Clear-to-Send (+) RS485 RS422 (+) Rx COM2
4 GND – Ground GND GND COM2
5 RTS – Ready-to-Send RS485 RS422 (+) Tx COM2
TB4 (C) 20 MA RS485 RS422 PORT
1 (+) TX – Remote Display
Passive, 20 mA Output
COM2
2 (–) TX – Remote Display
Passive, 20 mA Output
COM2
3
(+) 7.5V Bluetooth
®
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