Hitachi PQF Quick Start Up Manual page 17

Power quality filter
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Item
Description
67
Locking status / Alarm and fan contact indicator / Digital output contact indicator
When the PQF-Manager closes one of its output relays, the corresponding symbol lights up. The digital
outputs of the PQF-Manager are discussed later in this section
68
Filter selection
69
Start stop acknowledgment fault
The PQF-Manager also acts as connection point for external user I/O communication. Connections are made at the
rear side of the PQF-Manager.
The terminal designation is given in
Item
Customer terminals
70
Digital input 1 and 2
71
Digital outputs 1 to 6 with one common point
72
Alarm outputs (2 outputs with complementary signals)
73
Lock switch
74
Modbus adapter interface (optional) connection
75
CAN bus connection interface (routed to PQF-Manager connector)
76
Power supply terminals (routed to PQF-Manager connector)
77
Ethernet
78
USB
79
Temperature probes
The terminal explanation is given next:
69
Digital input 1 and 2
The digital inputs can be used for three different functions:
– Implementation of remote control functionality;
– Implementation of local on/off buttons (not provided);
– Selection of main filter settings or auxiliary filter settings (e.g. different filter settings for the day and for the night)
The PQF-Manager is used to associate the required functionality with the chosen digital input. The digital inputs can
also be disabled.
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.
The external voltage source needed to drive the digital inputs has to comply with the following characteristics:
STATUS
Approved
Figure 15
depicts the terminals that are present on the PQF-Manager rear side.
Table 10.
Table 10: Terminal designation
SECURITY LEVEL
Public
(Figure
15)
DOCUMENT ID
9AKK107045A4703
Q UICK STA RT-UP G UI DE
REV.
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PAGE
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en
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