!
t
a
ms elektronik
WRM-4
5. Connecting subordinate circuits
The WRM-4 evaluates the income signals against earth. Thus you can connect the outputs of
the WRM-4 to:
the inputs of subordinate electronic circuits with a current consumption of max. 250 mA;
relays to switch the inputs of subordinate electronic circuits with a current consumption of
more than 250 mA or to switch circuits requiring to be galvanically isolated;
relays to switch the current at the outputs of subordinate modules;
the inputs of digital feedback modules (e.g. s88 modules).
5.1. Connecting s88 modules
In order to occupy a number of inputs of the feedback modules as small as possible, you can
connect only one output of each function area (for one position). In theory, the drive must be
in the other position when the connected output is not connected to earth.
In order to increase the
safety of the feedback
system, it possibly makes
sense to connect each of
the two outputs of a
function area to one input
of the feedback detector.
This enables you to
supervise both positions.
5.2. Directly connecting subordinate circuits
You can connect the inputs of circuits with a maximum current of 250 mA like lamps directly to
the outputs of the WRM-4 and to the return conductor for all outputs.
Attention:
When connecting loads with a current consumption of more than 250 mA the outputs of the
WRM-4 will be damaged.
Connecting subordinate circuits | 19