Fixings; Ancillary Equipment; Table 3-1 Wire Crimp Sizes - Siemens 7SG11 Manual

An option for RS485 electrical interface is available. A maximum of 256 devices can be connected using 120
ohm screened twisted pair wire ie Belden 3105A, or similar, terminated with a suitable flat blade or pin connector.
The last device in the circuit must be terminated with the termination link as show in section P20008-Diagrams &
Parameters, this connects the internal 120 ohm terminating resistor.

3.5 Fixings

3.5.1 Crimps
Davico ring tongue with 90 deg bend
Table 3-1 Wire crimp sizes
Wire Size
2
0.25 to 1.6 mm
2
1.0 to 2.6 mm
3.5.2 Panel Fixing Screws
Kit ZA0005-062 comprising of:
Screw Pan Head M4x10mm (Black) ZB5364-101 2off
Nut M4 2103F11040 2off
Lock washer 2104F70040 2off
Two kits are required for the R4, R6 and R8 case sizes.

3.6 Ancillary Equipment

The Argus can be interrogated locally or remotely by making connection to the fibre optic terminals on the rear of
the case. For local interrogation a portable PC with a fibre to RS232 modem is required. The PC must be capable
of running Microsoft Windows 98 or greater, and it must have a standard RS232 port, a USB- RS232 adaptor, or
a suitable PCMC1A RS232 adaptor can be used in order to drive the modem. The Reydisp communications
package can then be used to interrogate the relay using the IEC 60870-5-103 protocol. For remote
communications more specialised equipment is required see Section 4: Communications Interface in the
Technical Reference section of this manual.
©2013 Siemens Protection Devices Limited
Davico
DVR1-4 (90deg)
DVR2-4 (90deg)
7SG11 Argus User Manual
P20006 Page 17 of 37