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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
G
N
D
C
T
S
/
T
X
-
T
X
/
T
X
+
R
X
/
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