V.35 link pinouts – Perle Systems IOLINK-520 User Manual
Page 101
Interface Pinouts
IOLINK-520 & IOLINK-PRO Installation & Applications Guide — D.7
V.35 Link Pinouts
The connector pinouts described here correspond to the connector labeled “V.35” on
the back of the IOLINK-520 & IOLINK-PRO.
13
1
25
14
DB25
Contact
Number
M.34
Contact
Number
Circuit
Name
Direction
To From
DCE DCE
1
A
Protective Ground
NA
2
----------
3
----------
4
C
Request to Send
X
5
----------
6
E
Data Set Ready
X
7
B
Signal Ground
NA
8
F
Data Channel Received Line Signal Detector
X
9
P
Transmitted Data (A)
X
10
S
Transmitted Data (B)
X
11
R
Received Data (A)
X
12
T
Received Data (B)
X
13
----------
14
V
Receiver Signal Element Timing (A)
X
15
----------
16
X
Receiver Signal Element Timing (B)
X
17
----------
18
U
Transmitter Signal Element Timing (A) DTE
X
19
W
Transmitter Signal Element Timing (B) DTE
X
20
H
Data Terminal Ready
X
21
Local Loopback
X
22
J
Calling Indicator
X
23
Y
Transmitter Signal Element Timing (A)
X
24
----------
25
a
Transmitter Signal Element Timing (B)
X
Figure D - 8 V.35 Link Pin Outs
The connecting cable must be a shielded cable.
Circuits which are paired (contain an (A) and (B) reference) should be connected to twisted pairs
within the connecting cable.
NOTE For U.K. Approval:
The connecting cable may be any length between 0 and 5M. One end must be terminated in a male 34 pin
X.21 bis connector as defined in ISO-2593 1984. The other end must be terminated in a male 25 pin X.21 bis
connector as defined in ISO-2110 1989