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HGL Manual
5.0 PQconnect Connectivity
25
Table 10: Power & Communications Terminals
Terminal
Pin
Description
Label
Rating
J1, J2, J3
1
Phase A
For factory use; Measurement
connection points
600VAC
2
Phase B
3
Phase C
J4
1,2,3,4 Not Connected
N/A
5,6,7,8
Current transformer
connections
For factory use; Only used for
filters with dual tuned circuits
N/A
J5
1
RS485
Not Connected
N/A
2
B (non-inverting)
3
Ground
4
A (inverting)
5
Not connected
J12
1
Input Power from control
power transformer
Neutral
120 VAC
2
Line
J14
1-14
Micro Programming
For factory use
N/A
Note:
The power terminals on the PQconnect accepts 28 to 14 AWG stranded wire, with a
tightening torque of 4.4 in-lb. (0.5 Nm).
Table 11: Form C Relay Contacts
Terminal Pin
Description
Label
Tightening
Torque
Wire Range
J7
1, 2
Multi-functional digital Input 1
Customer contacts
3.5 lb.-in (0.4 Nm) 28-12 AWG
J8
1, 2
Multi-functional digital Input 2
Customer contacts
3.5 lb.-in (0.4 Nm) 28-12 AWG
J11
1
Digital output form C Contact 1
Normally Closed (NC)
4.4 lb.-in (0.5 Nm) 28-14 AWG
2
Common (COM)
3
Normally Open (NO)
J10
1
Digital output form C Contact 2
Normally Closed (NC)
4.4 lb.-in (0.5 Nm) 28-14 AWG
2
Common (COM)
3
Normally Open (NO)
Note:
Form-C relay contacts are gold plated with a load rating of 5.0A @ 120VAC
The filter is set to control the contactor pickup/drop-out at 30% of load current by factory
default. This setting can be changed in the tech access page from the settings menu.
Multi-functional digital inputs have the following functions:
•
3 = Reset Command
•
4 = External Control Input
Digital Output form C Contact
•
J11 reserved for contactor control
•
J10 used for status detection
Modbus RTU
The PQconnect Modbus RTU network communication interface transmits and receives command
and status data from the PQconnect Modbus master over a RS-485 serial link. Modbus RTU is a
simple serial communications protocol originally developed by Modicon for use with Programmable
Logic Controllers (PLCs) in control of industrial devices. Modbus RTU is commonly supported by
most PLCs and is an open, royalty-free communications standard.
Wiring and Configuration
The PQconnect implements a Modbus RTU Master/Slave device, which supports two-wire RS-485
signal levels. The PQconnect communication port used for the Modbus RTU interface is connected
directly to the PCB. The communication port is located on the side of the PQconnect board.
•
DEFAULT: 0 = Disabled
•
1 = Tuning Reactor Thermal Switch Input
•
2 = Line Reactor Thermal Switch Input
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