Function And Usage; Terminal Description - Sulzer ABS CA 461 Guide D'installation

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FUNCTION AND USAGE

CA 461 is a standalone leakage detection monitor for DIN rail mount.
1.1 Function
In case of water leakage, the resistance between the sensor electrode and housing will decrease. If the resist-
ance becomes lower then 100k ohms (±10 %), the output goes active and contact on terminal 5 and 6 are
closed. The signal has to be stable for 10 seconds before the output is activated.
Connect terminal 3
to ground or housing
of the pump.
Leakage: sensors must be in parallel
It is very important to have in mind that this practice avoids alarms to be distinguished. Sulzer highly
recommends to use one module per signal to allow not only distinguishing but also acting in a differ-
ent way according to the alarm category/severity.
If pump is operated from a motor drive or frequency converter, special precautions are required.
The high electric noise level can distort electrical readings and in extension jeopardize functionality.
To avoid conducted electrical noise, follow best practices and manufacturer EMC compliance recommenda-
tions when installing frequency converters. Use shielded cables and 50 cm separation between power and
signal cables. Ensure that the cables are also separated from each other in cabinets.
Terminal Description
1 Power supply (0 V or N)
2 Power supply (+24 VDC or L1)
3 Ground / Pump chassis
4 Input(s) from pump probe(s)/anode(s)
5 Output contact
6 Output contact (NO)
35 mm
(1,38)
Power Supply
CA 461
3 4 5 6
Output
Input
Leakage
108 mm
(4,25)
3
en