Make sure that you have the replacement spare part available.
If the connectors of the existing component are still usable, do not disconnect the
wiring, but remove the connectors and use them for the replacement component.
Replacing surge protector unit
QSP431
1
Battery switch
2
AC (mains) power switch
3
Surge protector (for RS-232/RS-485 data)
Switch off both AC (mains) power switch and battery switch.
Make sure that there is no AC (mains)
power available for the system.
Disconnect the wiring and pull out the component from the DIN rail.
Connect the wires.
Serial data cable wiring:
RS-232
QSP431
Pin
Data cable
TxD
4
TXD (data out)
GND
5
Signal ground
RxD
6
RXD (data in)
Serial data cable wiring:
RS-485
QSP431
Pin
Data cable
D+
4
RS-485 D+
GND
5
Signal ground
D−
6
RS-485 D−
QSP431 internal wiring
X2 Pin
Color
Description
4
Green
TXD/D+
5
Dark blue
Signal ground
6
Yellow
RXD/D−
Attach the replacement component on the DIN rail.
Attach the connectors on the connector board.
The components for data 1 and data 2 are side by side on the DIN rail. Data 1 is on the
left and data 2 on its right.