Westermo TD-29 AC Manuel D'installation page 12

Connections TD-29
Interface 1 (RS-232)
Direction 9-pos. D-sub
Pin. no.
O 1
O 2
I 3
NC 4
– 5
O 6
I 7
O 8
NC 9
I = Input into modem O = Output from modem
Interface 2 (RS-422/485)
Direction Screw terminal
I 9
I 8
I/O 7
I/O 6
– 5
I = Input into modem O = Output from modem
RS-485/422 connection
4-wire
Twisted pair
TD-29
9
A'
Receiver
8
B'
7
A
Transmitter
6
B
Shield* 5
* NB if shielded cable is used it should be connected only at one extreme in order to avoid
circulating earth currents in the shield.
12
Tel : 03.26.04.20.21 - Fax : 03.26.04.28.20 - Web : http: www.audin.fr - Email : info@audin.fr
Screw ITU-T V.24
terminal Description
–
4
3
–
5
–
2
1
–
ITU-T V11 Description
Description
A' (R+) Receiver (4-wire)
B' (R–) Receiver (4-wire)
A (T+) Transmitter
B (T–) Transmitter
– Shield
2-wire
RS-422
equipment
A
Transmitter
B
Transmitter/
A' Receiver
Receiver
B'
AUDIN - 8, avenue de la malle - 51370 Saint Brice Courcelles
1
6
2
7
3
8
4
9
5
Description
109 DCD/Data Carrier Detect
104 RD/Received Data
103 TD/Transmitted Data
– –
102 SG/Signal Ground
107 DSR/Data Set Ready
105 RTS/Request to Send
106 CTS/Clear to Send
– –
The definations R+/R–, T+T–
can be varios between
different manufactures.
TD-29
Twisted pair
7
A/A'
6
B/B'
Shield* 5
9 8 7 6 5 4 3 2 1
9 8 7 6 5 4 3 2 1
RS-485
equipment
Transmitter/
A/A'
Receiver
B/B'
6611-2001