Oxygen Sensor Input; Flow Switch Status Input; Oxygen Alarm Relay Outputs - Bacharach Neutronics Mini-ICS Operation Manual

2.1.3.1

Oxygen Sensor Input

Connections to the sensor are made at terminal block TB4 on the rear of the analyzer chassis. Be
certain to match the terminal pins against the terminal ID label on the top of the analyzer chassis.
Refer to Appendix F – reference drawings.
Use 20-AWG, 2-conductor, stranded-wire, twisted pairs for the connections. When interfacing
directly to the sensor, use shielded cable, and drain the shield to dc earth-ground at the analyzer.
When interfacing through passive (Zener type) safety barriers, use shielded cable, and drain the
shield to dc earth-ground at the barriers.
barriers, shielded cable is not necessary.
2.1.3.2

Flow Switch Status Input

Connections to the flow switch circuit are made at terminal block TB4 on the rear of the analyzer
chassis. Be certain to match the terminal pins against the terminal ID label on the top of the
analyzer chassis. Refer to Appendix F – reference drawings.
Use 20-AWG, 2-conductor, stranded-wire, twisted pairs for the connections. It is not necessary to
use shielded cable for the Flow Switch interface, with or without electrical barriers.
Note a 4-conductor shielded cable may be used to wire both the sensor and flow switch in a single
cable.
2.1.3.3

Oxygen Alarm Relay Outputs

Connections from the Oxygen Alarm relay contacts to the user's process control equipment are
made at terminal block TB2 on the rear of the analyzer chassis. The Oxygen Alarm relay contacts
are voltage-free Form C relay contacts, SPDT, 5A@250VAC, 5A@30VDC. Be certain to match
the terminal pins against the terminal ID label on the top of the analyzer chassis. Refer to
Appendix F – reference drawings.
CAL
Valve
C NO
TB2
1
Manual Part Number:
5-06-4900-53-0
Fault O2 Alarm
C NC NO
C NO
4 5 6
2 3
Revision Level: C
ECO 044952
When interfacing through active (isolating) safety
ICS Valve
C NC NO
7 8 9 10 11
Revision Date:
May 08, 2018
Installing the Analyzer
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