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.