M4200 - User manual
Revision: 07.03.2017 Page 10
Open collector outputs
The alarm monitor has 4 open collector outputs; all of them can be activated by any of the 8 alarm inputs.
These outputs are able to work as energized or de- energized, similar to the output relays. This section
contains information about the 2 principles and how to use them.
Figure 6 shows the connection diagram of the output terminals (terminal 19 - 22) on the alarm monitor.
Figure 6. Wiring example, open collector outputs.
Normally de-energized
The alarm monitor is delivered with all open collector outputs operating as normally de-energized.
This means that the output has no reference whether power is on or off. When an incoming alarm activates
the output, status is changing to negative (÷) reference.
Normally energized
It is possible to programme each of the open collector outputs to operate individually as normally energized.
This means that the output changes to negative (÷) reference when the power is switched on. When an
incoming alarm activates the output, status is changing and the negative (÷) reference disappears.
Load capacity
Maximum load capacity for the open collector outputs is 60VDC / 700mA.
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