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WIRING THE MODBUS CARD
EATON
Powerware
®
Modbus
®
Card User’s Guide
S
164201376 Rev C
www.powerware.com
9
For four-wire networks.
All four RS-485 network signals including TxD(+),
RxD(+), TxD(–), and RxD(–) must be connected to the terminal strip as
illustrated in Table 1. Verify that the Modbus Card J9 and J10 jumpers
are set to the four-wire option (see “Four-Wire Communication” on
page 4).
TxD+
RxD+
TxD–
RxD–
GND
1
2
3
4
5
Figure 8. RS-485 Terminal Strip
Table 1. RS-485 Terminal Strip Pin Assignments
Pin Number
Modbus Card Signal Name
RS-485 Network Signals
Master Signal Name
1
TxD(+)
RxD(+)
2
RxD(+)
TxD(+)
3
TxD(–)
RxD(–)
4
RxD(–)
TxD(–)
5
Signal common
Signal common
RS-485 Modbus Port
For two-wire networks.
Connect the RS-485 network signal TxD(+) to the
Modbus RxD(+) input signal (DB-9 Pin 1). Connect the RS-485 network
signal TxD(–) to the Modbus RxD(–) input signal (DB-9 Pin 6). The
Modbus Card factory-default jumper setting for J9 and J10 is two-wire
communication.
For four-wire networks.
All four RS-485 network signals including TxD(+),
RxD(+), TxD(–), and RxD(–) must be connected to the pin assignments
on the DB-9 connector as illustrated in Table 2. Verify that the Modbus
Card J9 and J10 jumpers are set to the four-wire option (see “Four-Wire
Communication” on page 4).
Содержание Network Adapter FCC 15
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