Pin #

In/Out

Name

Description

I/F circuit

1

I/O

+

RS-485 plus signal

USB

RS-485

2

I/O

-

RS-485 minus signal

3

I

G

Ground

Mating Connector 

Description:                3 pin 0.15” (3.81mm) connector

Manufacturer:                 On-Shore

Manufacturer Part:        EDZ1550/3         

NPA part number:        430-303-10

Note: Other 3.81mm compatible connectors can be used.


Command format

Interface

Connector

Physical layer

Rate

Protocol

USB

USB-B receptacle (front panel “USB”)

USB 2.0 full speed, HID class

12 Mbit/s

Commander commands through the Commander HID API (no driver installation)

RS-485

3-pin 3.81 mm (front panel “RS485”)

2-wire, half duplex

9,600, 19,200, 38,400, 57,600, 115,200 baud

Commander ASCII commands


Commands are ASCII text. Over RS-485 each command is addressed to a device ID and terminated with a carriage return, and the controller replies with the requested value, OK, or ? for an invalid command. Over USB the same commands are sent through the Commander HID API (Windows DLL). See the Commander command reference for the syntax and command set.


See Communication Interface in the Commander Theory of Operation for full descriptions.