3
1
FUNCTION AND USAGE
CA 462 is a combined standalone leakage detection and temperature blocking
relay for DIN rail mount.
1.1
Function leakage
In case of water leakage, the resistance between the sensor electrode and hous-
ing will decrease. If the resistance becomes less than 100 kohm (±10 %) between
terminals 11 and 12, the relay contact on terminal 1 and 2 closes. The signal has
to be stable for at least 10 seconds before the relay is been activated.
1.2
Function Temperature blocking
If the temperature in the pump is rising and the terminal protector sets off, the
CA 462 is blocking the pump without any delay.
Automatic reset
−
if terminal 14 and 15 are open;
pump starts automatically when the tempera-
ture is back to normal.
Manual reset
−
if terminal 14 and 15 are bridged;
manual reset has to be done by terminal 13
and 14 after the temperature is back to normal.
Table 1:
Connection chart
Terminal
Description
1
Leakage Alarm Relay (NO)
2
Leakage Alarm Relay
3
High Temperature Alarm Relay (NO)
4
High Temperature Alarm Relay
5
Pump Relay (NO) (Closed under normal operation)
6
Pump Relay
7
Power Supply (0 V
or
N)
8
Power Supply (+24 VDC
or
L1)
9
Input from pump temperature sensor (PTC / Klixon)
10
Input from pump temperature sensor (PTC / Klixon)
11
Input from pump leakage probes
12
Connect to Ground or Pump chassis
13
Reset switch for high temperature alarm
14
Reset switch for high temperature alarm
15
Manual reset required if bridged to terminal 14*
* If bridged to terminal 14; manually reset is required after high temperature alarm
after
condi-
tion is back to normal. If
not
bridge; pump start automatically when condition is back to normal.
Table 2:
Product reference
Article
Description
16907006
CA 462 110-230 VAC Supply voltage
16907007
CA 462 18-36 VDC Supply voltage
One item of Xylem MiniCas adapter is included in both 16907006 and 16907007.
Temperature and leakage relay type ABS CA 462, Installation guide
EN
81907004H
