L3447
Emax DC
81/108
Model
Scale
Page No.
Doc. No.
Apparatus
1SDH000635R0002
L3728
14.3 PR120/K signalling module
14.3.1
General characteristics
The module enables the local signalling of alarms and circuit-breaker trips.
There are two possible configurations for the SIGNALLING module:
- default configuration: 1 digital input, 3 contacts with pole in common, 1 independent contact;
- alternative configuration: 4 independent contacts. In this case, the digital input is wired, but not brought up to the terminal block.
The two configurations are alternative to each other. You can switch from one configuration to the other without changing the module, by using
a different wiring, as illustrated in the wiring diagrams in figs. 46 or 47.
14.3.2
Front view
- "Power" LED (lit when Vaux or PR120/V - PR120/LV are installed)
- N° 4 LED: associated with the signalling contacts.
14.3.3
Releases complete with the module
- optional for PR122/DC
- optional for PR123/DC
14.3.4
Characteristics of the digital input
The unit enables the digital input to be associated with the following functions:
- enabling of an alternative set of parameters, set B (PR123/DC only);
- outside trip control;
- zeroing release trips;
- resetting PR120/K contacts;
- local/remote enabling;
- resetting energy meters.
The digital input is activated by a 24VDC + 20% voltage.
For the load control function, the module can be used as an actuator.
14.3.5 Characteristics of the signalling contacts
The following data are defined for resistive loads
Type of contact
SPST
Max switching voltage
130 VDC
380 VAC
Max switching current
5 A
8 A
Max switching power
175 W
2000 VA
Breaking capacity at 35 VDC
5 A
----
Breaking capacity at 120 VDC
0.2 A
----
Breaking capacity at 250 VAC
----
8 A
Breaking capacity at 380 VAC
----
5.2 A
Contact/coil insulation
4000 Veff
Contact/contact insulation
1000 Veff
