76 Electrical design and installation
Manual Power Quality Filter PQFM
Switch controlled
by external process
24 Vdc
external
power
supply
(b)
S
+
-
1
(a)
2
(a)
+
-
PQF-Manager
Digital input 1
(15-24Vdc)
Remarks:
(a)
Left hand terminal block when looking from rear, counting from top to bottom
(b)
Acceptable power supply range: 15Vdc-24 Vdc, driving current 13mA@24Vdc
Figure 59: Implementation of remote control functionality on Digital Input 1 of
the PQF-Manager
WARNING: If a function is assigned to a digital input, the same function must never be
assigned to the other digital input. Otherwise the filter may behave erratically.
Once the cabling has been finished, the power to the filter may be restored. Then, the
PQF-Manager has to be used to associate the remote control functionality with Digital
Input 1. This is done by going to the digital input setup menu and selecting ‘Remote ON’
for digital input 1. When this is done the filter will switch on when the switch S shown in
is closed and the filter will switch off when the switch S is opened. Refer to
Section 7.9.1.4
for guidelines on how to navigate to the digital input setup menu.
In a multi-master arrangement, the master that has the control over the system (i.e. the
master which is operational and which has the lowest address) will monitor the digital
inputs. Therefore, in order to obtain full redundancy with filters consisting of more than
one master unit, the digital inputs of all the units in a multi-master arrangement have to
be set up and cabled in the same way.
Remarks:
−
When the remote control functionality has been activated this function has
priority over a local start/stop command. When the local command has to be
given, deactivate first the remote control functionality by navigating with the
PQF-Manager to the digital input setup menu and setting the digital input
considered to ‘Disabled’.
−
The remote control functionality can also be implemented on the Digital Input 2.
