ANALOX Sub Mk III F, User Manual

Page: 30 / 79

Sub MkIIIF
User Manual
Int. Approved
Document ref: ASF3-800-08 November 2018 Page 30 of 79
Copyright © 2009 Analox Ltd. All Rights Reserved.
Commercial in Confidence
6.3.2 Remote Sensor Electrical Installation
Each remote sensor is fitted with an IP68 chassis mounted Lemo Series 2K male connector. A
cable is also supplied with a matching Lemo 2K series connector. This cable is to be cut down to
length (if necessary) and terminated at a junction box within the chamber. Wiring from that
junction box is then to be routed through a penetrator back to the Operator Console. For any
further guidance or advice, please contact Analox.
The pre-made cables are made from the following cable type : DEF STAN 61-12 (Part 25) cable
–
Raychem 62628A (NSN 6145-99-892-0076).
Each metal enclosure has an M6 earth stud for equipotential bonding purposes as required.
PIN NO Cable Core FUNCTION
1 Pair 1 Red Power In +24V DC
2 Pair 1 Blue Power In 0V DC
3 Pair 2 Red RS485 Comms +
4 Pair 2 Blue RS485 Comms -
5 Pair 2 Screen (Green) RS485 Comms Screen
6 Pair 3 Red Auxiliary Pair +
7 Pair 3 Blue Auxiliary Pair -
8 NC NC
Screen Earth Screen
The Auxiliary Pair are only used on a REM3 which performs Oxygen Injection. The pair is a
powered 24V DC Output which may power an external gas solenoid valve directly.
However it is usual to wire this through a relay contact on an independent monitoring system,
such that the injection can be overridden if the monitoring system determines that the oxygen
level is too high.
6.4 System Gas Handling Installation
All of the remote sensors are ambient monitors. They must be mounted such that they can ‘see’
the gas atmosphere that they are measuring. The only connection required is at the time of
calibration via Analox supplied flow adaptors and tubing.
Special versions of REM1 and REM2 are designed for mounting external to a chamber and will
require a sample flow with an in-line flowmeter.
6.4.1 Injection Systems