Sub MkIIIF
User Manual
Int. Approved
Document ref: ASF3-800-08
November 2018
Page 27 of 79
Copyright © 2009 Analox Ltd. All Rights Reserved.
Commercial in Confidence
R
el
ay
1
(
R
E
M1
)
R
el
ay
2
(
R
E
M1
)
R
el
ay
3
(
R
E
M1
)
R
el
ay
4
(
R
E
M2
)
R
el
ay
5
(
R
E
M2
)
R
el
ay
6
(
R
E
M2
)
R
el
ay
7
(
N
A)
R
el
ay
8
(
N
A)
O2 Low
X
X
O2 High
X
X
O2 Fault
X
X
CO2 Hi
X
X
CO2 HiHi
X
X
CO2 Fault
X
X
Pressure Low
X
X
Pressure Hi
X
X
Pressure Fault
X
X
In battery powered systems, such as submarine rescue vehicles, in order to reduce power
consumption, if the user does not require relay functionality, the relays will be left unpowered.
Each relay is assigned to an alarm/fault condition, or group of alarm/fault conditions. It is also
assigned a fail-safe or non fail-safe mode. In Fail-safe mode, when the instrument is switched off,
the relays are de-energised, and this is taken as the alarm state. Therefore when switched on, the
relays will be energised whenever there is no alarm/fault present.
Alternatively, in non ‘Fail
-
Safe’
mode, the relays are energised when the alarm/fault condition is present.
So for instance, a relay could be set to provide an ‘Oxygen Low’ indication. This contact can
optionally also indicate any fault condition associated with the oxygen sensor (over-range,
calibration error, no communications with REM1).
Summary of Contents for Sub Mk III F
Page 2: ......
