ABB PQFS Installation, Operation And Maintenance Instructions page 24

Information on cabling the digital output contacts is given in
Information on setting up the digital outputs with the PQF-Manager is given in
7.9.1.4
3
Alarm outputs and fan outputs
Apart from the digital outputs, one potential free relay with a NO and a NC alarm output
is available. This relay contact is activated if any error condition is present during a
preset time. The relay contact is deactivated if the error condition has disappeared for
another preset time. Information on changing the alarm activation/deactivation time is
given in Section
In a master-master filter arrangement, only the master that has the control over the
complete system will activate its alarm contact. For full redundant functionality, it is
recommended to monitor the alarm contacts of all the units in the filter system.
The maximum continuous alarm contact ratings are: 250 Vac/1.5 A.
A fan relay can be activated if a temperature probe detects an overtemperature.
4
Lock switch
Allows locking the settings of the filter panel. This switch is documented in
7.9.3.5.
5
Modbus RTU adapter interface (optional) connection
The Modbus adapter interface is connected at this location. The output of the interface
is an RS-485 socket. The interface is described in the Modbus RTU interface manual.
6
CAN bus connection interface
The PQF-Manager communicates with the main controller through a CAN bus. This bus
consists of three terminals, i.e.:
−
Pin H: CAN High signal
−
Pin L: CAN Low signal
−
Pin Shield: shielding
The CAN bus wiring terminates into the PQF-Manager connection plug and is
subsequently routed to the main control (Cf.
communications only.
7
Power supply terminals
The PQF-Manager power supply is provided by the filter itself. The corresponding
terminals on the PQF-Manager labeled "Power supply" are connected to the PQF-
Manager connection plug.
24 Hardware description  Manual Power Quality Filter PQFS
7.9.1.4.1.
Section 6.12.
Section 4.6.1). It is used for PQF internal
Section
Section