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EXCEL 500/600 INSTALLATION INSTRUCTIONS
Inside the cabinet:
J-Y-(ST)Y 2 x 2 x 0.8
Outside the cabinet:
A-Y-(ST) 2 x 2 x 0.8
In principle, data transmitting cables should be shielded in
case of RFI.
The following summarizes cable types and gives selection
guidance. Note that baud rate and maximum bus length are
related to each other.
Table 19. C-Bus cable types
Cable type Description Recommended for
J-Y-(ST)Y
2 x 2 x 0.8
shielded,
twisted pair
Europe
Inside cabinet
A-Y-(ST)Y
2 x 2 x 0.8
shielded,
twisted pair
Europe
Outside cabinet
AK 3702
unshielded,
twisted pair
US
not approved for Europe
AK 3740A shielded
US (low-cost)
not approved for Europe
Belden 9842 twisted pair
Europe
US also possible
Belden 9841 shielded US
AK 3702
unshielded,
twisted pair
US
not approved for Europe
AK 3740A shielded
US (low-cost)
not approved for Europe
Each end of the shield on the C-Bus should be connected to
the shield terminal of the respective device. Do not connect it
to the cabinet ground or any other ground points.
C-Bus Extension by Using Repeaters
The C-Bus length can be extended by using repeaters. Each
repeater extends the bus length by 4000 ft (1200 m).
For the US the repeater is available either with or without
housing. In Europe, only the version with housing is allowed.
Table 20. Order no. for repeaters
Description US order No. European order no.
without housing 14507324-001 -
with housing 14507324-002 XD509
C-Bus Termination (Excel 600)
The XC6010 CPU module may have either the XD505A or
the XD508 submodules mounted on them for C-Bus
communication. Table 18 provides baud rate information for
selecting the module.
The XD508 submodule is equipped with a DIP switch which
activates (ON position) deactivates (OFF position) a
terminating resistor. Depending on where the controller is
located on the bus the DIP switch settings must be as follows:
Table 21. XD508 DIP switch settings for C-Bus
termination
Controller location DIP switch setting
beginning or end of bus ON
middle of bus OFF
C-Bus Termination (Excel 500)
The XC5010C CPU module contains a switch for setting
different C-Bus baud rates.
Fig. 83. XC5010C C-Bus termination switch location
The bus termination switch for setting the baud rate has three
settings:
Table 22. XC5010 C-Bus termination switch settings
Switch
setting
Baud rate Notes:
S1
up to 76800 baud
with bus termination
same functionality as
XD508A, up to 76800 baud
S2
up to 76800 baud
without bus
termination
same functionality as
XD508A, up to 76800 baud
S3 up to 9600 baud
same functionality as
XD505A - Default setting
C-Bus Termination (Excel 500-XCL5010)
The communication module for the XCL5010 is equipped with
a DIP switch for the C-Bus to set the bus termination
appropriate for the communication speed.
EN1R-1047GE51 RR0902 38