Rs-442a serial port – Verilink AS100 (896-502379-001) Product Manual User Manual
Page 103
Access System Centum Series User Manual
B-3
RS-442A Serial Port
RS-422A Category I signaling is provided through a female DB-25
connector per the RS-530 specification. With an external adapter cable,
the same signals are provided through a female DB-37 connector per the
RS-449 specification. The pin assignments are shown. Verilink cabling
is recommended:
458-501792-
0
1
5
D-type 25-pin (DB-25) male connectors at both ends
(in compliance with RS-530 specification). Fifteen feet long. Optional at
extra cost.
RS-530
(DB-25)
Connector
RS-449
(DB-37)
Adapter
Signal
To/From
Access System
100
15
5
Transmit Clock (A)
From
17
8
Receive Clock (A)
From
24
17
Ext. Transmit Clock (A)
To
2
4
Transmit Data (A)
To
3
6
Receive Data (A)
From
12
23
Transmit Clock (B)
From
9
26
Receive Clock (B)
From
11
35
Ext. Transmit Clock (B)
To
14
22
Transmit Data (B)
To
16
24
Receive Data (B)
From
4
7
Request to Send (A)
To
8
13
Data Carrier Detect (A)
From
5
9
Clear to Send (A)
From
20
12
Data Terminal Ready (A)
To
6
11
Data Set Ready (A)
From
19
25
Request to Send (B)
To
10
31
Data Carrier Detect (B)
From
13
27
Clear to Send (B)
From
23
30
Data Terminal Ready (B)
To
22
29
Data Set Ready (B)
From
7
19
Ground
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