Lutron Electronics Softswitch128, Installation Manual

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Step by Step Installation Instructions for Softswitch128

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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:

N

No

otte

es

s::

• 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.

LT-1

LT-1

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.