5.
Connection instructions / grounding
Provided that the operating voltage drop does not exceed 0.5 V DC (see drawing) the
IDENT-KEY block lock can be mounted at a maximum distance of 5 m to the evaluation
unit.
Please note:
Intrusion detection
control unit
max. operating voltage drop = 0.5 V
max. 5 m
+UB
+UB
+UB
+UB
0V
0V
0V
0V
Evaluation unit
IDENT-KEY
block lock
Grounding:
It is very important that the shielding, or the grounding, is realized correctly to ensure for reliable
function of a system.
When mounting an IK-block lock into a wooden door with wooden frame the cable shielding must
lead from the central unit to the block lock without interruption.
When mounting the block lock into a metal door or a wooden door with metal frame the shielding is
interrupted in the evaluation unit in order to avoid grounding loop.
The correct grounding has to be observed for metal doors or wooden doors with metal
frame. If you are not sure whether the frame is connected to ground correctly measure the
resistance between the frame and the next-possible ground-connected object (e.g.
central unit housing, heating, water pipe or similar object).
When the grounding is correct you can measure a resistance of <1 .
W
Mounting and Connection Instructions IK2 block lock
21
