Appendix vi: acc 2860 communication wiring, A. port a, Analog interface – Fairbanks 2800 Series Intrinsically Safe Instrument User Manual
Page 70: Adedicated and an isolated power supply
01/12
70
50647 Rev. 9
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.
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