Datasheet

TDB401016en / Main catalogue part 4 – Residual current monitors, Residual current monitoring systems / 07.2010 25
4.1
Residual current monitor RCM420
Operating and display elements
1 - Power On LED "ON" (green); lights when supply voltage is applied
and flashes in the event of system fault alarm respectively in
the event of CT malfunction.
2 - Alarm LED "AL1" (yellow), prewarning, lights when the set response
value I
Δn1
has been exceeded or flashes in the event of system
fault alarm respectively in the event of CT malfunction.
3 - Alarm LED "AL2" (yellow), alarm, lights when the set response
value I
Δn2
has been exceeded and flashes in the event of system
fault alarm and in the event of CT malfunction.
4 - Multi functional LC display
5 - Test button "T": to call up the self test.
Arrow up button: parameter change, to move up in the menu
6 - Reset button "R": to delete saved alarms.
Down button: parameter change, to move down in the menu
7 - "MENU" button: to call up the menu system.
Enter button: confirm parameter change.
Press ESC: press the button > 1.5 seconds.
1
4
5
23
6 7
U
S
1 - Supply voltage U
S
see ordering information,
(6 A fuse recommended)
2 - Connection of the external measuring current transformer
3 - Alarm relay K1:
Programmable for alarm I
Δn1
/ I
Δn2
/ TEST / ERROR
4 - Alarm relay K2:
Programmable for alarm I
Δn1
/ I
Δn2
/ TEST / ERROR
5 - Combined test and reset button "T/R"
short-time pressing (< 1.5 s) = RESET
long-time pressing (> 1.5 s) = TEST
* when a shielded cable is used.
Do not route the PE conductor through the measuring current
transformer!
Wiring diagram
12
*
3
4
5