Technical data

RS-485 Connections
Documentation Number: LES40xA-1105m Appendix C 77
Black Box Corporation - 1000 Park Drive - Lawrence, PA 15055-1018
www.blackbox.com -- Tech Support and Ordering: 724-746-5500 - Fax: [phone]
1 Port Serial Server 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
+
R
T
S
/
RX
-
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. 1 Port Serial Server Terminal Block Pin-out in RS-232
Mode
RS-485 Connections
78 Appendix C Documentation Number: LES40xA-1105m
Black Box Corporation - 1000 Park Drive - Lawrence, PA 15055-1018
www.blackbox.com -- Tech Support and Ordering: 724-746-5500 - Fax: [phone]