41
Instruction Booklet
IB156002EN
Effective January 2022
Eaton HCU2/HCUn active harmonic
filter installation manual
EATON
www.eaton.com
Figure 47 . Two unit parallel communication wiring diagram
Active Filter
Control Board
1P
(RJ45)
2P
(RJ45)
Factory
Provided RJ45
Terminator
Active Filter
Control Board
1P
(RJ45)
2P
(RJ45)
Factory
Provided RJ45
Terminator
(Shielded) CAT5e cable with RJ45 connectors
Figure 48 . Four unit parallel communication wiring diagram
Active Filter
Control Board
1P
(RJ45)
2P
(RJ45)
Factory
Provided RJ45
Terminator
Active Filter
Control Board
1P
(RJ45)
2P
(RJ45)
Active Filter
Control Board
1P
(RJ45)
2P
(RJ45)
Active Filter
Control Board
1P
(RJ45)
2P
(RJ45)
Factory
Provided RJ45
Terminator
(Shielded) CAT5e cable with RJ45 connectors
Control wiring
Dry contact output
Four dry Contact outputs are available at J2 of the Control Board.
See
Figure 36
on
page 32
. One common and four switchable
outputs are available labeled Q1 to Q4. The four outputs can be
programmed to change states on different conditions by the HMI
and be set to either normally open or normally closed. See the User
Manual for setting the output contacts. Maximum voltage accepted
is 250 Vac or 30 Vdc with a 1 A maximum current for the HCU2 and
0.5 A maximum current per dry contact for the HCUn.
Digital input control
Four input controls are available at J2 of the Control Board. See
Figure 36
on
page 32
. One Ground and four inputs labeled I1 to
I4. The inputs are at 5 Vdc and are grounded to activate. The control
function can be programmed by the HMI. See the User Manual for
setting the functionality of the input control.
Modbus
®
TCP/IP
Modbus TCP/IP monitoring is available at the RJ-45 jack to the right
of the control board labeled ETH. Refer to
Figure 36
on
page 32
.
Modbus addresses are provided in the User Manual.
Modbus Serial
A serial Modbus connection is available through an RJ-45 jack
labeled MBS on the control board. Refer to
Figure 36
on
page 32
.
Modbus addresses are provided in the User Manual.
Figure 49 . Serial Modbus pin-out
Table 14 . Serial Modbus pin-out
Pin
Signal name
Direction
Meaning
1
Not connected
—
—
2
Not connected
—
—
3
Not connected
—
—
4
D1
Input/output
Transfer data (RS-485)
5
D0
Input/output
Transfer data (RS-485)
6
Not connected
—
—
7
Not connected
—
—
8
SG
—
Signal ground