ABB Relion SMU615, Applications Manual

Page: 72 / 76

The merging unit is provided with connection sockets X13, X14 and X15
only if the optional communication module with light sensor inputs has
been installed. If the arc protection option is selected when ordering a
merging unit, the light sensor inputs are included in the communication
module.
Table 33: Light sensor input connectors
Terminal Description
X13 Input Light sensor 1
X14 Input Light sensor 2
X15 Input Light sensor 3
4.2 Outputs
4.2.1 Outputs for tripping and controlling
Output contacts PO1, PO2, PO3 and PO4 are heavy-duty trip contacts capable
of controlling most circuit breakers. In the factory default configuration, the trip
signals from all the protection stages are routed to PO3 and PO4.
Table 34: Output contacts
Terminal Description
X100:6 PO1, NO
X100:7 PO1, NO
X100:8 PO2, NO
X100:9 PO2, NO
X100:15 PO3, NO (TCS resistor)
X100:16 PO3, NO
X100:17 PO3, NO
X100:18 PO3 (TCS1 input), NO
X100:19 PO3 (TCS1 input), NO
X100:20 PO4, NO (TCS resistor)
X100:21 PO4, NO
X100:22 PO4, NO
X100:23 PO4 (TCS2 input), NO
X100:24 PO4 (TCS2 input), NO
Merging unit's physical connections 1MRS758580 C
72 SMU615
Application Manual