Technical data
11.2 Cable
SENTRON PAC4200
184 System Manual, 09/2009, A5E02316180B-02
11.2 Cable
Requirements
Use a serial, shielded, 3-core interface cable:
● Two twisted cores are required for the signals -A and +B
● The third core is required for the Common signal.
The maximum length of the bus cable depends on the following:
● The baud rate
● The properties of the cable used:
– Thickness
– Capacitance
– Characteristic surge impedance
● Number of stations
● The network configuration, e.g. 2-wire cable with shield
Additional information
You can find more information about the cables in the standard ANSI TIA/EIA-485-A-98 and
in the "MODBUS over Serial Line Specification and Implementation Guide".
11.3 PAC RS485 expansion module - standards
Description
Table 11- 1 The device meets the following standards
Standard Title
ANSI TIA/EIA-485-A-98 (R2003) (RS 485) "Electrical Characteristics of Generators and
Receivers for Use in Balanced Digital Multipoint
Systems"
Note
Other standards
In addition to the above-mentioned standards, those listed in the manual of the
SENTRON PAC Power Monitoring Device also apply.
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