Siemens SIMADYN D Hardware Manual page 180

Communications support modules
RS 232
interface
20mA interface
NOTE
6-32
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the programmer side, according to the following drawing.
A 4-core screened round cable is required (e. g. LICYC 4*0,5, Metrofunk).
Operating a PC or PG750/770 via the standard RS 232 (V.24) interface:
1 9
18
10
19 26
SS4
Fig. 6-7 SS4 at a PG750/770 ( COM1 ) via the RS 232 interface
(the two jumpers for the PC are not required!)
Operating the PG750/770 at the active SS4 communications module
(active: Line current source and -sink on the SS4 side; thus, higher data
integrity can be achieved with long cables and high baud rates):
1 9
10 18
19 26
SS4 active
Fig. 6-8 SS4 at PG750/770 ( COM1 ) via the 20mA interface (active)
Operating the PG750/770 at the passive SS4 communications module
(passive: Line current source and -sink are not at the SS4 side):
1 9
10 18
26
19
SS4 passive
Fig. 6-9 SS4 at PG750/770 ( COM1 ) via the 20mA interface (passive)
If the PG750/770 is operated as passive 20 mA current interface, then
switches S3/2 and S3/3 in the PG must be opened (refer to the
PG750/770 Manual).
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1
14
PG750/770 ( COM 1, V24 )
1
14
PG750/770 ( COM 1, 20mA )
passive
1
14
PG750/770 ( COM 1, 20mA ) active
Hardware - SIMADYN D
Edition 12.2004
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