ABB EQmatic - Connection Diagram

ABB EQmatic
Device technology
QA/S x.yy.1 | 2CDC512090D0202 15
Connection diagram
QA/S 4.xx.1
1
U
s
supply voltage connection
5
LAN/LINK LED (yellow)
2
RS-485 Modbus slaves/meter connection
6
Modbus RTU LED
3
Ethernet/LAN connection
7
Reset button (behind label carrier)
4
ON LED (green)
8
Label carrier
Important
The bus cable must be terminated with resistors (120 Ω, 0.25 W) at both ends so that only minimal
reflections are produced. The serial communication on the RS485 interface operates most efficiently if
the source and load impedance are matched at 120 Ohm. The EOL resistors are connected in parallel
with terminals A and B and are included in the scope of delivery.
2CDC072005F0018