Step by Step Installation Instructions for Softswitch128TM System 7
Step 3
Control Station Wiring
Maximum total length of the control link is 2,000 feet.
This distance is based on proper shielding of the
twisted/shielded pair, proper wire size, and the use of
link terminators (LT-1) at each end of the link. If
unapproved cable or smaller wire is used, control link
length must be de-rated according to the following
chart:
NNootteess::
• Make wire connections inside the wallbox and
Softswitch128 panel.
• All control wiring is Class 2/PELV. Do not run any
Class 2/PELV wire with line voltage (mains voltage)
wiring.
• The order of control addresses on the control link is
not important.
2000 ft. (600 m) maximum
Terminal 1 & 2
Wires Sizes
#12 AWG
#14 AWG
#16 AWG
#18 AWG
2.5 mm
2
1.0 mm
2
Max. Control
Link Length
2000 ft. (600 m)
1400 ft. (425 m)
900 ft. (275 m)
600 ft. (180 m)
450 m (1500 ft.)
200 m (650 ft.)
Control Station Wiring Overview
Note: Link Terminators (LT-1) are
required at the start and end of
the Softswitch128 Class 2/PELV
Link.
Control Station Wiring Specifications
Notice! If Link Terminators (LT-1) are not
used or improper wiring topology is
employed, the system will not
communicate properly.
Softswitch128 Panels
Control Stations:
Wallstations, contact closure input, contact
closure output, and RS232 devices
The Softswitch128 system communicates to control stations using a Class 2/PELV low voltage link. Control
stations include wallstations, contact closure input and output devices, and RS232 interfaces. Wallstations are
to be mounted in a standard wallbox. Care must be taken in wiring the link; please follow these guidelines:
• Link must be daisy chained.
• Must run low-voltage in separate trough from line (mains) voltage.
• Link must be less than 2000 feet (600 m) long.
• Install Link Terminators (LT-1) at the start and end of the Class 2/PELV daisy-chained link.
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