Digitax ST Installation Guide 23
Issue: 7
Mechanical Installation Introduction
Mechanical Installation
Electrical Installation UL Listing Information
3.5 Terminal torque settings
Table 3-1 Torque settings
*Torque tolerance = 10 %
Table 3-2 Plug-in terminal block maximum cable sizes
3.6 Routine maintenance
The drive should be installed in a cool, clean, well ventilated location. Contact of
moisture and dust with the drive should be prevented.
Regular checks of the following should be carried out to ensure drive / installation
reliability are maximized:
Terminals Torque setting*
Power terminals 1.0 N m (12.1 lb in)
Control terminals 0.2 N m (1.7 lb in)
Status relay terminals 0.5 N m (4.5 lb in)
Ground terminals 4 N m (35 lb in)
Small ground terminal screws 2 N m (17.7 lb in)
Model size Terminal block description Max cable size
All 11 way control connectors
1.5 mm
2
(16 AWG)
All 2 way relay connector
2.5 mm
2
(12 AWG)
Environment
Ambient
temperature
Ensure the enclosure temperature remains at or below maximum specified
Dust
Ensure the drive remains dust free – check that the heatsink and drive fan are
not gathering dust. The lifetime of the fan is reduced in dusty environments.
Moisture Ensure the drive enclosure shows no signs of condensation
Enclosure
Enclosure door
filters
Ensure filters are not blocked and that air is free to flow
Electrical
Screw
connections
Ensure all screw terminals remain tight
Crimp terminals
Ensure all crimp terminals remains tight – check for any discoloration which
could indicate overheating
Cables Check all cables for signs of damage
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