Connecting A Central Phase Monitor - Zumtobel NBOX Montageanleitung

Assigning output circuits to the terminals, nBox OCM ELP modules and status indicators/test keys
Figure 8: Minimum distances when installing the nBox
4.6

Connecting a central phase monitor

Terminals S1+ and S1- are bridged upon delivery by a 1 kohm resistor and form a current loop. When the current
loop is opened, the nBox system switches to partial emergency operation and all emergency luminaires are
switched on.
An external phase monitor can be integrated in this current loop, which then opens this loop if a phase failure
occurs. More than one external phase monitor can be connected in series.
Note
i
When connecting the central phase monitor, the following technical data must be observed:
Line length
Terminating resistor
Conductor cross-section
Voltage
Current
nBox, Installation instructions 1.0 | 02.2021 | en
·
For each nBox OCM ELP module, 2 output circuits can be
connected.
·
The assignment of the terminals to the nBox OCM ELP
modules and status indicators/test keys is fixed and
shown in the image on the left.
Max. 500 m (max. 50 Ω
line resistance)
1,000 Ω (connection in
series)
0.75 – 2.5 mm²
15 V
0–10 mA
Mounting and installation
23