ABB SREA-50 Guide D'installation Et De Mise En Route page 7

Connecting the power supply
Connect 9-28 V DC to Vin+ and Vin-.
The power requirement of SREA-50 is 2 W.
Note: Do not power up the adapter until advised to do so in section
Powering up SREA-50
Connecting the inverter(s)
Recommended cable type
It is recommended to use shielded twisted pair cable (STP),
impedance 100...150 ohm (eg, Lapp Kabel UNITRONIC LiHCH
(TP) or equivalent) with 120 ohm termination resistors.
Modbus connection diagram
Inverter 1
1(+)
X4
2(-)
S1:2 OFF
Inverter 2
1(+)
X4
2(-)
S1:2 OFF
...
Inverter n
1(+)
X4
2(-)
S1:2 ON
Quick installation and start-up guide – SREA-50 7
on page 10.
3
3
3
Termination resistor
120 ohm
External 120 ohm resistor is recommended
instead of the inbuilt resistor if the inverter is not
powered.
SREA-50
A-
B+
COM