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DRY CONTACT RELAY ALARMS
General Description
As seen throughout this manual, alarms can be set on a long list of parameters. These
alarms are available in three different ways:
- Through the HMI using colour coded notifications flags
Alarms will appear in red and warnings in yellow, otherwise all will be green:
HMI: Measurements / Alarms
- Through the digital interface to the CBW3, depending on the protocol used, with alarm
status fields
- Though their assignment to available dry contact relays
We will cover this last method here. Even though modern digital protocols are most often
used, it is available for connection to older SCADA systems.
Available Alarm Relays
Two dry contact alarm relays, K1 and K2, are provided as standard on the base ProWatch
module.
The K2 output is used to provide the state of the CBW3. It is the result of the system's own
self-checking function. It can inform the maintenance service and/or supervision system of
an internal malfunction with the CBW3 system or even of loss of power to the CBW3.
The K1 output is user programmable and can be set against one or many of the alarm
parameters available. For example, in the context of gas supervision, it is possible to assign
the output to one of the gas level thresholds.
An additional 16 different alarm relays are available with the DO16 optional module.
Each one can be triggered by one or several alarms set and specified by the user.
MA-037 - CB Watch 3 Operating Manual
Figure 180 – Alarm colour coding
v7.0 - May 2020
Page 106 of 118
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