GE Industrial Solutions MX150_MX250 Modbus Network Card - Manual (Page 19)

■ ■ GE Zenith Controls 17 ■ ■ MX150/MX250 Series Modbus Network Card (71R-2200)
Appendix E
MASTER
DEVICE
A
B
MX150/250
WITH
MODBUS
CARD
SLAVE #1
A
B
MX150/250
WITH
MODBUS
CARD
SLAVE #2
A
B
MX150/250
WITH
MODBUS
CARD
SLAVE #3
SEE NOTE 1
A
B
N OTE :
1. TERMINATION JUMPER (J6), LOCATED ON THE MODBUS
CARD, MUST BE CONNECTED ON THE LAST SLAVE IN THE
CHAIN. (REFER TO FIGURE 3 FOR JUMPER POSITIONS)
2. A MAXIMUM OF 247 SLAVES CAN BE ADDRESSED ON
THE MODBUS NETWORK.
3. RECOMMENDED TWISTED PAIR WIRE IS BELDEN 8471,
16 AWG (GE ZENITH PART # WMW-453).
4. FOLLOW STANDARD RS485 WIRING (INSTALL A REPEATER
IF THE WIRE LENGTH EXCEEDS 4,000 FT. OR FOR EVERY 32
DEVICES ON THE NETWORK).
RS 485 Multi-Drop Connection