3

MOUNTING INSTRUCTIONS

This operator interface is designed for through-panel mounting. A panel cut-

out diagram and a template are provided. Care should be taken to remove any

loose material from the mounting cut-out to prevent that material from falling

into the operator interface during installation. A gasket is provided to enable

sealing to NEMA 4X/IP66 specification. Install the 14 kep nuts provided and

tighten evenly for uniform gasket compression.

Note: Tightening the kep nuts beyond a maximum of 17 inch-pounds (1.92

N-m) may cause damage to the front panel.

CONNECTING TO EARTH GROUND

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

1. USB’s shield may be connected to earth ground at the host. USB’s shield

in turn may also be connected to signal common.

POWER SUPPLY REQUIREMENTS

The units require a 24 VDC power supply rated at 26 W. Your unit may draw

considerably less than the rated power depending upon the options being used.

As additional features are used your unit will draw increasing amounts of power.

Items that could cause increases in current are additional communications,

optional communications card, CompactFlash card, and other features

programmed through Crimson.

In any case, it is very important that the power supply is mounted correctly if

the unit is to operate reliably. Please take care to observe the following points:

– The power supply must be mounted 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. 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.

8.925

(226.7)

2.975

(75.6)

12.25 (311.2)

6.125 (155.6)

11.725 (297.8)

8.40

(213.4)

14X ∅.188 (∅4.8)

All tolerances ±0.010" (±0.25 mm).

ALL NONINCENDIVE CIRCUITS MUST BE WIRED USING

DIVISION 2 WIRING METHODS AS SPECIFIED IN THE NATIONAL

ELECTRICAL CODE, NFPA 70 FOR INSTALLATION WITHIN THE

UNITED STATES, OR AS SPECIFIED IN THE CANADIAN

ELECTRICAL CODE FOR INSTALLATION IN CANADA.

WARNING - EXPLOSION HAZARD - DO NOT DISCONNECT

EQUIPMENT WHILE THE CIRCUIT IS LIVE OR UNLESS THE AREA

IS KNOWN TO BE FREE OF IGNITABLE CONCENTRATIONS.

Each option card comes with a cable for communications and three

screws for attaching the option card to the G3’s main board.

To install the option card, remove all power and I/O communications

cables from the unit and remove the rear cover. Connect the cable from the

option card to the connector on the main board. Be sure both ends of the

cable are firmly seated into their appropriate connector housings. Use the

three screws provided to mount the option card to the main board as shown

in Figure 1.

Carefully replace the rear cover by reversing the instructions for

removing the rear cover.

TYPICAL EXPANSION CARD INSTALLATION

Figure 1

WARNING - EXPLOSION HAZARD - DO NOT DISCONNECT

EQUIPMENT UNLESS POWER HAS BEEN DISCONNECTED

AND THE AREA IS KNOWN TO BE NON-HAZARDOUS.