Wallbox Power Boost Installation Manual page 14

POWER METER INSTALLATION
Installation
7.
Connect the meter to the charger using an STP Class 5E
1600 feet/500 meter Max Length communication cable.
For the communication between charger and meter only
three wires are needed. The connection between terminals
7-8 is a loop for activating the end of line resistor of the
communication.
14
7 8 9 10
B+ A- GND
EM 530
T
7
B+
8
A-
9
GND
10
11 12
Wallbox
D- (RS485B)
(RS485A)
D+
GND