Westermo TR-23 - Handbuch (Seite 12)

12 6600-2002
O 1 109 DCD/Data Carrier Detect
O 2 4 104 RD/Received Data
I 3 3 103 TD/Transmitted Data
NC 4
– 5 5 102 SG/Signal Ground
O 6 107 DSR/Data Set Ready
I 7 105 RTS/Request to Send
O 8 106 CTS/Clear to Send
NC 9
Signal description
Terminal connection (DCE)
(RS-232-C/V.24, 9-pole D-sub, female alt. 9-pole screw terminal)
I = input O = output NC = not connected
Potential free
contact
The connection to the
potential free contact
(relay) is made by
position 1 and 2 in the
9-pole screw terminal.
RS-422/485 connection
(9-pole screw terminal) Line connection
(4-pole screw terminal)
2-wire lines are
connected to pins
1 and 2
Direction
Pin
no. Screw-
terminal
CCITT V.24
Description
Direction No. Description
Receiver 9 A’ (R+)
Receiver 8 B’ (R-)
Transmitter 7 A (T+)
Transmitter 6 B (T-)
5 Shield
Direction
Pin no.
line
Description
Receiver 3 R
Receiver 4 R
Transmitter 1 T
Transmitter 2 T
Connections TD-23
RS-485/422 connection
1) NB if shielded cable is used it should be connected only at one extreme in order to avoid
circulating earth currents in the shield.
4-wire 2-wire
9
8
7
6
5
7
6
5
A’
B’
A
B
A
B
A’
B’
Receiver
Receiver A/A’
B/B’ B/B’
A/A’
Twisted pairs
Twisted pairs
TD-23 TD-23
Transmitter
Transmitter
RS-422
equipment RS-485
equipment
Transmitter/
Receiver Transmitter/
Receiver
Shield 1) Shield 1)
N 115V*/230V
L AC power
PE/Protective Earth
Power connection (AC)
(3-pole screw terminal)
* TD-23 115V
No.
Power
supply