Fairbanks 2800 Series Intrinsically Safe Instrument - Manual (Page 70)

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Appendix VI: Acc 2860 Communication Wiring
A. PORT A
FROM TB3 IN THE PC PC
ACC 2860 3550 3950 610 3960 3921 DB25 DB8
Pin 1 RXA/CTS 20 4 4 2 20 2 3
Pin 2 TXA 3 3 3 3 3 3 2
Pin 3
Pin 4 GND 7 7 7 7 7 7 5
Pin 5
FROM TB6 IN THE RMT RMT
160X FROM TB6 IN THE
ACC 2860 140XA/150X ACC 2860
Pin 1 20 *(+) 1 1 Pin 5 AI (+) ***
Pin 2 20 (–) 5 7 Pin 6 AI (–) ***
Pin 4 GND
Jumper Pins Jumper Pins
2 to 6 2 to 8
* A 22 AWG ground wire must be connected from the remote to Acc 2860.
 ** Do not use the +12V as a source for 20mA current loop or 4-20mA or any
other device.
*** AI = Analog Interface .
The 4-20MA connections are made at this location.
C A U T I O N
The 4-20ma accessory is a passive device!
The power is to be supplied by others, and MUST
BE
a DEDICATED and an ISOLATED power supply.