• Before wiring, verify the correct model number and
options on the label. Switch off the power while
checking.
• Care must be taken to ensure that the maximum
voltage rating specified on the label is not exceed-
ed.
• It is recommended that the power for these units
be protected by fuses or circuit breakers rated at
the minimum value possible.
• All units should be installed in a suitable enclosure
to prevent live parts from being accessible to
human hands and metal tools. Metal enclosures
and/or subpanels should be grounded in accor-
dance with national and local codes.
• All wiring must conform to appropriate standards
of good practice and local codes and regulations.
Wiring must be suitable for the voltage, current,
and temperature rating of the system.
• Beware not to over-tighten the terminal screws.
The torque should not exceed 1 N-m (8.9 lb-in or
10 KgF-cm).
• Unused control terminals should not be used as
jumper points as they may be internally connected,
causing damage to the unit.
• Verify that the ratings of the output devices and the
inputs as specified are not exceeded.
• Except for thermocouple wiring, all wiring should
use stranded copper conductor with a maximum
gage of 14 AWG.
• Electrical power in industrial environments con-
tains a certain amount of noise in the form of tran-
sient voltage and spikes. This electrical noise can
adversely affect the operation of microprocessor-
based controls. For this reason the use of shielded
thermocouple extension wire which connects the
sensor to the controller is strongly recommended.
This wire is a twisted-pair construction with foil
wrap and drain wire. The drain wire is to be
attached to ground in the control panel only.
6
*With power on, it takes 12 seconds to memorize the new values of parameters once they have been changed.
Chapter 7 Wiring Precautions
Chapter 8 Operation
8–1 Keypad Operation
