Communications support modules
Hardware - SIMADYN D
6-29
Edition 12.2004
6
6.7 Interface module SS31
6DD1688-1AC1
The SS4 communications module can be equipped with an
RS 485
interface
to establish a
USS bus connection
using the SS31 interface sub-
module.
The interface module is a 40 pin (dual-in-line) hybrid device which can be
inserted in the socket provided on the SS4 communications module.
When inserting the module, ensure that it is correctly aligned: The recesses
of the socket of the interface module (or pin 1, marked with a point) and the
socket on the SS4 (X51) must coincide.
•
data transfer rate up to 1 Mbaud
•
max. cable length dependent on the baud rate:
200 m at 1 Mbaud
•
no terminating resistor
To enable the transmitter, the RTS signal must be set to „1“.
This enable signal is generated using an appropriate jumper in the
connector of the SS4 communications module.
6.7.1 Pin assignment
Pin No
Function
Pin No
Function
1 Not
assigned
21 0V
2 0V
22 0V
3 5V
23 -TxD
4 0V
24 +TxD
5
Not assigned
25
Not assigned
6 DCD
26 +RTxC
7 0V
27 -RTxC
8 RTS
28 +DCD
9 Not
assigned
29 -DCD
10 TxD
30 +RxD
11 TRxC
31 -RxD
12 RxD
32 5V
13 RTxC
33 5V
14 Not
assigned
34 Not
assigned
15 -RTS
35 0V
16 +RTS
36 0V
17 -TRxC
37 Not
assigned
18 +TRxC
38 Not
assigned
19 Not
assigned
39 Not
assigned
20 Not
assigned
40 Not
assigned
Order No.
Description
Features
Enabling the
transmitter
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