SC300 Handbook
140
Copyright © 2007-2018 Eaton Corporation. All Rights Reserved.
IPN 997-00012-03 B2 Issue B2 July 2018
Connector Type Purpose Pin Description
3 Relay 3 Common (COM)
4 Relay 4 normally closed (NC)
5 Relay 4 normally open (NO)
6 Relay 4 Common (COM)
XH20/XH21 Digital relay outputs 5-6*
Digital outputs are voltage-
free.
1 Relay 5 normally closed (NC)
2 Relay 5 normally open (NO)
3 Relay 5 Common (COM)
4 Relay 6 normally closed (NC)
5 Relay 6 normally open (NO)
6 Relay 6 Common (COM)
XH22/XH23 Digital relay outputs 7-8
IOBGP-10/11/20/21 only
Digital outputs are voltage-
free.
1 Relay 7 normally closed (NC)
2 Relay 7 normally open (NO)
3 Relay 7 Common (COM)
4 Relay 8 normally closed (NC)
5 Relay 8 normally open (NO)
6 Relay 8 Common (COM)
XH20/XH21 Digital relay outputs 9-10
IOBGP-10/11only
Digital outputs are voltage-
free.
1 Relay 9 normally closed (NC)
2 Relay 9 normally open (NO)
3 Relay 9 Common (COM)
4 Relay 10 normally closed (NC)
5 Relay 10 normally open (NO)
6 Relay 10 Common (COM)
YH3 RJ45 DC power system digital
inputs
Digital input signals are
referenced to live bus.
1 Load Fuse Fail
2 Battery Fuse Fail
3 +12V out
4 AC Distribution Fan Fail
5 AC Distribution MOV Fail
6 0V out (system live - protected)
7 -
8 System common - protected
YH11/
YH11A
(IOBGP-
10/11/20/21
only)
RJ45 RXP System
Communications
1 System Positive 24/48V
2 System Positive 24/48V
3 -
4 RS485-A
5 RS485-B
6 -
7 System Negative 24/48V