ABB PQFM - Page 86

86 Electrical design and installation  Manual Power Quality Filter PQFM
Figure 65 shows a cabling diagram for implementing a start function on the first digital
input and a stop function on the second digital input.
External
stop
push
24 Vdc
external
supply
+-
1
(a)
2
(a)
3
(a)
4
(a)
PQF-Manager
Digital input 1 (15-24Vdc)
Digital input 2 (15-24Vdc)
Remark:
(a)
Left hand terminal block when looking from rear, counting from top to bottom
External
start
push
Figure 65: Cabling diagram for implementing start on digital input 1 and stop
on digital input 2
− The second approach is to use one digital input for both the start function and
the stop function. This leaves the other digital input available for the
implementation of other functions.
Table 35 shows the PQF-Manager setup for the input considered and the resulting effect
when applying voltage to this input.
Table 35: Filter behavior as a function of the PQF-Manager settings for local start/stop and
using 1 digital input
PQF
-
Manager setup for
digital input
Vlow applied to digital
input
Vhigh applied to digital input
Edge ON/OFF
No effect
Filter starts on first rising edge, stops
on second rising edge, etc
Remark
: Vlow = 0 Vdc, Vhigh = 15
-
24 Vdc
Refer to Section 7.9.1.4 for guidelines on how to set up the digital inputs according to
the function required.
The electrical requirements of the digital inputs are as discussed in Section 4.5. Figure
66 shows a cabling diagram for implementing a start function and a stop function on
the first digital input.