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AHNET PROTOCOL

Communications protocol

COMMUNICATION

CONNECTION

WIRING

Wiring Diagram

1. Data TX +

2. Data TX –

3. Data RX +

4. NC

5. NC

6 .Data RX

7. NC

8. NC

Connection

PINS 1 & 2

The units respond

PINS 3 & 6

The units receive instructions

Protocol to control the unit by addressable RS422 bus.

You can connect up to 30 monitors on the same RS422 bus.

You can use a AH Interface Ethernet, to control the RS422 bus.

The units should have a set address and the address must start by 1.

Maximum cable length between ends, 500 m/1640 ft.

AHnet protocol

Using 5 bytes communication:

BYTE 0

BYTE 1

BYTE 2

BYTE 3

BYTE 4

RS422

RJ45

CAT-5

START BYTE

ADDRESS BYTE

COMMAND BYTE

VALUE 1

VALUE 2

Speed and configuration

BAUD RATE

DATA BITS

PARITY

STOP BITS

RJ-45

38400

NONE