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Bulletin No. CR3000- B
Released 2018-09-10
Drawing No. LP1042
CONNECTING POWER
The CR3000 requires a 10-30 VDC
power supply. A pluggable power block is
provided to connect the 24 VDC. There are
three screw terminals. Strip and connect the
wire according to the terminal block
specifications on Page 2. Connect the
positive lead to the plus (+) screw and the
negative lead to the minus (-) screw.
Please take care to observe the following points:
– Mount the power supply close to the unit, with usually not more than
6 feet (1.8 m) of cable between the supply and the operator
interface. Ideally, the shortest length possible should be used.
– The wire used to connect the operator interface’s power supply
should be at least 22-gage wire suitably rated for the temperatures
of the environment to which it is being installed. If a longer cable run
is used, a heavier gage wire should be used. The routing of the
cable should be kept away from large contactors, inverters, and
other devices which may generate significant electrical noise.
– A power supply with an NEC Class 2 or Limited Power Source (LPS)
and SELV rating is to be used. This type of power supply provides
isolation to accessible circuits from hazardous voltage levels generated
by a mains power supply due to single faults. SELV is an acronym for
“safety extra-low voltage.” Safety extra-low voltage circuits shall exhibit
voltages safe to touch both under normal operating conditions and after
a single fault, such as a breakdown of a layer of basic insulation or after
the failure of a single component has occurred. A suitable disconnect
device shall be provided by the end user.
CONNECTING TO EARTH GROUND
Each operator panel has a chassis ground terminal on the back of the
unit. Your unit should be connected to earth ground. Steps should be
taken beyond connecting to earth ground to eliminate the buildup of
electrostatic charges.
The chassis ground is not connected to signal common of the unit.
Maintaining isolation between earth ground and signal common is not
required to operate your unit. But, other equipment connected to this unit
may require isolation between signal common and earth ground.
To
maintain isolation between signal common and earth ground care must
be taken when connections are made to the unit.
For example, a power
supply with isolation between its signal common and earth ground must
be used. Also, plugging in a USB cable may connect signal common and
earth ground.
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USB’s shield may be connected to earth ground at the host. USB’s
shield in turn may also be connected to signal common.
MODULE
INSTALLATION
Remove module plug and attach module to CR3000. Torque screws to
6.0 pound-force inch [96 ounce-force inch] (0.68 Nm).
REMOVE
MODULE PLUG
WARNING: Disconnect all power
to the unit before installing or
removing modules.
Follow these steps to install the unit.
1. Make sure the bezel gasket is properly in place.
2. Place the unit into the front of the panel cutout.
3. Install stiffener plate over unit on the inside of the panel. This ensures
the mounting surface is stiff enough for a proper seal. The plate is
required to meet NEMA 4X and IP66.
4. Insert clamps into the slots provided on the sides, top and/or bottom of
the unit.
5. Make sure the clamp’s screw sits in the “U” shaped feature. This will
prevent the screw from “walking”. Tighten the clamping screws in an
even pattern until the unit is secured in the panel. To seal to Type 4X/
IP66 specifications, all supplied mounting clamps must be used and be
torqued as follows:
4, 7, and 10 inch: 4.0 lbf-in (0.45 Nm)
15 inch: 2.0 lbf-in (0.23 Nm)
CAUTION: DO NOT OVERTIGHTEN THE CLAMPS. The panel must
not flex more than 0.010" for proper sealing. The safety of any system
incorporating the equipment is the responsibility of the assembler of
the system.
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GASKET
MOUNTING
SURFACE
STIFFENER
PLATE
SCREW ANTI-WALK
FEATURE
