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Deif PPM 300 - Digital Inputs Wiring

Deif PPM 300
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Use a 470 Ω resistor to stop the wire break detection current leak from activating this relay.
INFO
Use an external resistor to prevent wire break detection in the stop coil.
6.6.6 Digital inputs wiring
The digital inputs are bi-directional inputs. This means that wiring to the input and common terminals may be swapped around
without affecting their operation.
However, all the digital inputs in a group share a common terminal. The digital input common for a module may be either low
(connected to 0 V), or high (connected to 12 or 24 V). If the common is low, all the digital input signals connected to the group must
be high (connected to 12 or 24 V). Similarly, if the common is high, all the digital input signals connected to the group must be low
(connected to 0 V).
The digital input common does not act as the common for any of the other terminals on the same hardware module. The digital input
common is also not affected by the digital input commons on other hardware modules.
The digital inputs are designed for a nominal voltage of 12 to 24 V DC.
Figure 6.24
Example of digital input wiring (common = 0 V)
12/24 V DC
0 V DC
Digital
signal
COM
INSTALLATION INSTRUCTIONS 4189340909I UK Page 81 of 144

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