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6F3B0250
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T1/T1S User’s Manual
4. Installation and Wiring
The applicable wire size is 0.3 mm
2
(22 AWG) to 1.25 mm
2
(16 AWG). The table below
shows the recommended wire size.
Type of signal Recommended wire size
Power 1.25 mm
2
(16 AWG)
Grounding 1.25 mm
2
(16 AWG)
I/O signals 0.3 mm
2
(22 AWG) to 0.75 mm
2
(18 AWG)
4.4 Grounding
The optimum method for grounding electronic equipment is to ground it separately from
other high-power systems, and to ground more than one units of electronic equipment
with a single-point ground.
Although the T1/T1S has noise immunity to be used in industrial operating conditions,
grounding is important for safety and reliability.
Check the grounding against the following criteria.
1. The T1/T1S must not become a path for a ground current. A high-frequency current is
particularly harmful.
2. Equalize the ground potentials when the expansion rack or unit is connected. Ground
the T1/T1S and the expansion rack or unit at a single point.
3. Do not connect the ground of the T1/T1S to that of high-power systems.
4. Do not use a ground that has an unstable impedance, such as painted screws, or
ground subject to vibration.
The grounding marked terminal (see below) is provided on the T1/T1S basic unit and the
expansion unit for grounding purpose.
!
CAUTION
1. Turn off power before wiring to minimize the risk of electrical shock.
2. Operation without grounding may cause electrical shock or malfunction.
Connect the ground terminal on the T1/T1S to the system ground.
CTi Automation - Phone: 800.894.0412 - Fax: 208.368.0415 - Web: www.ctiautomation.net - Email: info@ctiautomation.net