Siemens siprotec 7SD5 User Manual

3 Mounting and Commissioning
472
7SD5 Manual
C53000-G1176-C169-1
•CTS = Clear to Send
• GND = Signal / Chassis Ground
The cable shield is to be earthed at both line ends. For extremely EMC-prone envi-
ronments, the earth may be connected via a separate individually shielded wire pair to
improve immunity to interference.
Table 3-12 The assignments of the D-subminiature connector for the various serial interfaces
1)
Pin 7 also carries the RTS signal with RS232 level when operated as RS485 Interface. Pin 7 must therefore not be con-
nected!
Termination The RS485 interface is capable of half-duplex service with the signals A/A' and B/B'
with a common relative potential C/C' (GND). It is necessary to check that the termi-
nating resistors are connected to the bus only at the last device, and not at other
devices on the bus. The jumpers for the terminating resistors are located on the inter-
face module RS485 (see Figure 3-10) or on the PROFIBUS module RS485 or
DNP 3.0 RS485 module (see Figure 3-11). Terminating resistors can also be imple-
mented outside the device (e.g. in the plug connectors) as shown in Figure 3-12. In
this case, the terminating resistors located on the module must be disabled.
If the bus is extended, make sure again that only terminating resistors at the last
device to the bus are switched in.
Time Synchroniza-
t i o n I n t e r f a c e
It is optionally possible to process 5V, 12V or 24V time synchronization signals, pro-
vided that these are connected to the inputs named in the following table.
Table 3-13 D-subminiature connector assignment of the time synchronization interface
1)
only for PPS signal (GPS)
Pin No. Operator In-
terface
RS232 RS485 PROFIBUS FMS, DP Slave,
RS485
DNP 3.0 RS 485
1 Shield (with shield ends electrically connected)
2RxDRxD - - -
3 TxD TxD A/A’ (RxD/TxD-N) B/B’ (RxD/TxD-P) A
4 - - - CNTRA-(TTL) RTS (TTL level)
5 GND GND C/C’ (GND) C/C’ (GND) GND1
6 - - - +5 V (max. load < 100 mA) VCC1
7RTS
RTS -
1)
--
8CTS
CTS B/B’ (RxD/TxD-P) A/A’ (RxD/TxD-N) B
9- - - - -
Pin No. Designation Signal Significance
1 P24_TSIG Input 24 V
2 P5_TSIG Input 5 V
3 M_TSIG Return line
4 M_TSYNC
1)
Return line
1)
5 SHIELD Shield potential
6- -
7 P12_TSIG Input 12 V
8 P_TSYNC
1)
Input 24 V
1)
9 SHIELD Shield potential
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Siemens siprotec 7SD5 Specifications

General

Brand	Siemens
Model	siprotec 7SD5
Category	Relays
Language	English