B&B Electronics ESR901 User Manual
Page 86
RS-485 Connections
76
Appendix C
Manual Documentation Number: ESR90x-0508m
B&B Electronics Mfg Co Inc – 707 Dayton Rd - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104 – www.bb-elec.com
B&B Electronics Ltd – Westlink Commercial Park – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445 – www.bb-europe.com
ESR901 Terminal Block Pin-out in RS-485F (four-wire, full duplex) Mode
GN
D
CT
S/T
X-
TX
/TX
+
RX
/R
X+
RT
S/R
X-
1
2
3
4
5
Signal Name
RS-422
Direction
Terminal
Signal Ground
GND
---
1
Transmit Data (-)
TXD(-)
Out
2
Transmit Data (+)
TXD(+)
Out
3
Receive Data (+)
RXD(+)
In
4
Receive Data (-)
RXD(-)
In
5
Figure 55. ESR901 Terminal Block Pin-out in RS-232 Mode