Connector

Marking

Type

Pins

J3

G V+

2-way pluggable terminal block, 5.08 mm

G = supply return, V+ = 12–24 Vdc

J2

RS485

3-way pluggable terminal block, 3.81 mm

+ = data +, − = data −, G = logic ground

J4

USB

USB 2.0 type B

Standard USB pinout

A card-edge connector (J1) is present on the underside of the board for factory programming. It is not for customer use; nothing should be connected to it.