Power supply - mains voltage connection
18.104.22.168 Configurable inputs/outputs
56 | 118
Connection terminals on periphery board of FC721 station. A cable cross-section
of 0.2 to 1.5 mm
can be connected to the terminals.
(–) supply output 1
(+) supply output 1
Configurable input/output 4
Configurable input/output 3
Configurable input/output 2
Configurable input/output 1
Each of these freely configurable inputs/outputs can either be configured as an
input or output. The function and external circuit needed depend on the mode of
Example: Principle circuit on I/O 1 (connection 1)
I/O 1 as 'input'
The input can be triggered with a potential-free,
external switching contact. In such cases, the
corresponding input is switched to GND.
Depending on the programming, a permanent or
sensing contact can be connected. The activated
input can be used to program one of the station's
I/O 1 as 'output'
Configuration as 'output' allows for the activation of
external devices (e.g. relays) with 'Vsys' voltage
should certain events arise. In such cases, the
corresponding output is switched to GND.
The output's activation condition (e.g. alarm, fault,
isolation etc.) is defined in the customer data
DC 20 V – DC 30 V/1 A
Individual current max.
total current max. 1 A