ABB REL 551 2.3 Series - Configure the Interface Modules for V.36, X.21 and RS530

55
Configure the interface modules for V.36,
X.21 and RS530
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The connector for X.21 is a 15 pin DSUB according to X.21 standard. For RS530 the
connector is a 25 pin DSUB according to RS530 standard. The same 25 pin DSUB is
also used for the V.36 connection contrary to the 37 pin DSUB listed in the standard.
The pin lay-out is found in figure 15
and the explanation to designation in table 15.
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A Designations of terminals according to CCITT, EIA etc.
B Designations of terminals according to CCITT, EIA etc.
DCE Data communication equipment (= multiplexer, etc.)
DTE Data terminal equipment (= protection)
DTE READY Data terminal ready (follows auxiliary voltage)
GND Earth (reference for signals)
RCLK Receiver signal timing
* not for V.36
8 GND
7
6 RCLK
5
4 RXD(A)
3
2 TXD (A)
1 SCREEN
15
14
RCLK(B) 13
12
RXD(B) 11
10
TXD (B) 9
15 pin DSUB
X.21
25 pin DSUB
13
12 TCLK DCE (B
)
11 TCLK DTE (B
)
10
9 RCLK (B)
8
7 GND
6
5
4 REQ SEND (A
)
3 RXD (A)
2 TXD (A)
1 SCREEN
25
TCLK DTE(A) 24
DTE READY(B)* 23
22
21
DTE READY(A) 20
REQ SEND (B)* 19
18
RCLK(A) 17
RXD(B) 16
TCLK DCE(A) 15
TXD (B) 14
V.36, RS530
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