13
AHNET PROTOCOL
Communications protocol
COMMUNICATION RS422
CONNECTION RJ45
WIRING CAT-5
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
START BYTE
BYTE 1
ADDRESS BYTE
BYTE 2
COMMAND BYTE
BYTE 3
VALUE 1
BYTE 4
VALUE 2
RJ-45
Speed and configuration
BAUD RATE
38400
DATA BITS
8
PARITY
NONE
STOP BITS
1
