GAI-Tronics 262-001 Manual de usuario

Pub. 42004-173D

GAI-Tronics Corporation P.O. Box 1060, Reading, PA 19607-1060 USA

610-777-1374 800-492-1212 Fax: 610-796-5954

VISIT WWW.GAI-TRONICS.COM FOR PRODUCT LITERATURE AND MANUALS

GAI-TRONICS® CORPORATION

A HUBBELL COMPANY

Model 262-001 and 272-001

Intrinsically-Safe Telephones

Confidentiality Notice

This manual is provided solely as an operational, installation, and maintenance guide and contains

sensitive business and technical information that is confidential and proprietary to GAI-Tronics.

GAI-Tronics retains all intellectual property and other rights in or to the information contained herein,

and such information may only be used in connection with the operation of your GAI-Tronics product or

system. This manual may not be disclosed in any form, in whole or in part, directly or indirectly, to any

third party.

General Information

The GAI-Tronics Model 262-001 Indoor and Model 272-001 Outdoor Intrinsically-Safe (I.S.)

Telephones, and Model 263 Isolation Barrier Units (IBU) are designed to be installed in hazardous areas.

The IBU or rack-mount card unit is placed in a

non-hazardous area up to one mile from the

telephone. This limits the energy levels going

to the hazardous area.

For convenience, an I.S. telephone and the IBU

can be purchased together under a single model

number—Model 261-001 for indoor use and

Model 271-001 for outdoors. However, for

rack-mount configurations or special

applications, the telephones and IBU can be

purchased separately.

These telephones are constructed of durable

glass-reinforced polyester, which is highly

resistant to chemicals and weather. Both I.S.

telephone are rated Type 3R (rainproof).

Figure 1. Model 262-001 Intrinsically-Safe Telephone

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Installation

Installation Guidelines

When installing any GAI-Tronics telephone equipment, please adhere to the following guidelines to

ensure the safety of all personnel:

•NEVER install telephone wiring during a lightning storm.

•Install a UL Listed lightning arrestor on any phone installed where the phone or phone cable is at

risk of being exposed to lightning strikes. The lightning arrestor must be installed as close to the

phone as possible to maximize the protection. The lightning arrestor must not be installed within the

enclosure supplied with the phone.

•NEVER install telephone jacks in wet locations unless the jack is specifically designed for wet

locations.

•NEVER touch uninsulated telephone wires or terminals unless the telephone line has been

disconnected at the network interface.

•USE CAUTION when installing or modifying telephone lines.

•Install UL Listed telephone line suppressor (customer-supplied) on the telephone line.

•Use silicone sealant or equivalent around and inside all conduit entries

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Wiring Requirements

Design Limits

In order to be intrinsically safe, energy and energy storage must be constrained to “safe” levels in

hazardous area apparatus. Wiring inherently has capacitance formed by a dielectric material between two

conductors. A buildup of this capacitance can form a surge of electricity, a dangerous situation in a

hazardous area.

Intrinsically-safe telephones require cabling that will limit the amount of capacitance formed. The

limitation on cable length was set by Underwriter’s Laboratory (UL) based on test results. This “worst

case” cable available was found to have a capacitance of 60 picofarads/foot. Therefore, UL set the cable

limitation at one mile, the length at which this worst-case cable capacitance level was still within

acceptable bounds. Cable types with less capacitance have been specified to allow connection distances

over one mile.

For example: GAI-Tronics Model 60059-001 and 60021-301 cables allow connection distances of up to

1.5 miles.

Shielded Cable

Where multiple intrinsically-safe telephone wires are routed together, shielded cable should be used. The

use of shielded cable prevents cross-talk from occurring between multiple intrinsically-safe telephone

circuits. The shield must be grounded to an intrinsically-safe ground and connected only at the IBU.

Wiring Guidelines/Control Drawing

The Model 262-001 and 272-001 I.S. Telephones must be installed in accordance with GAI-Tronics

control drawing 73242 (Pub. 42004-380). In addition, the NEC and the CEC provide additional

installation details that are recommended for safe installation.

General Wire Types

24 AWG 22 AWG 20 AWG 19 AWG 18 AWG

Maximum capacitance,

C (picofarads/mile) 316,800 pF/mile

Maximum resistance,

R (ohms/mile) 271 171 107 85 67

*Ring signal loss,

decibels (dB/mile) -16 -12 -8 -6 -4

*Nominal ring signal is 98 dB @ 10 feet.

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Installing the Model 262-001 Indoor Telephone

The Model 262-001 Indoor Telephone is intrinsically safe when connected in accordance with

GAI-Tronics drawing 73242 (Pub. 42004-380).

1. Carefully loosen the four front panel screws, and slowly remove the front panel assembly.

2. After the front panel is disconnected, put it aside, and mount the enclosure to the wall using four ¼-20

machine screws with nuts and washers or #14 wood screws of the appropriate length depending on

the mounting surface. Refer to drawing 73242 (Pub. 42004-380) for details.

3. Feed the wire through the hub at the bottom of the enclosure.

4. Refer to drawing 73242 (Pub. 42004-380) for wiring details.

5. Replace the front panel assembly, and tighten the four front panel screws.

WARNING

Substitution of components may impair intrinsic safety.

Installing the Model 272-001 Outdoor Telephone

The Model 272-001 Outdoor Telephone is intrinsically safe when connected in accordance with GAI-

Tronics drawing 73242 (Pub. 42004-380).

1. Open the front door of the enclosure and locate the four outermost screws.

2. Loosen these four screws, and carefully pull the enclosure apart until there is a slight resistance on the

left side of the enclosure.

3. Separate the front half of the enclosure from the rear half by pulling on the left side of the enclosure

until the hinge plugs pull loose.

4. Put the front half of the enclosure aside, and mount the enclosure to the wall using four ¼-inch screws

of the appropriate length, depending on the mounting surface.

5. Feed the station wire through the hub at the bottom of the enclosure.

6. Refer to drawing 73242 (Pub. 42004-380) for wiring details. The station wire is the pair of wires

coming directly from the GAI-Tronics Model 263 Isolation Barrier Unit. This unit must not be

connected directly to the telephone system.

7. Close the front half of the enclosure, and secure it by tightening the four outermost screws.

WARNING

Substitution of components may impair intrinsic safety.

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System Setup

GAI-Tronics recommends taking the following steps to ensure a safe and trouble-free installation:

1. Install the Model 263 Isolation Barrier Unit (IBU) and wire it completely, except for the hazardous

area signal wires.

WARNING The unit must be wired in accordance with

drawing 73242 (Pub. 42004-380) to ensure intrinsic safety.

2. Next, temporarily connect the I.S. telephone to the IBU with a short pair of conductors, and operate

the unit by making a test phone call. If any problems are detected, see the Troubleshooting section.

3. Call the I.S. telephone from another telephone, and adjust the RING PITCH (located on the IBU) to

the desired pitch.

4. Disconnect the I.S. telephone and install it in the intended permanent location.

WARNING The unit must be wired in accordance with

drawing 73242 (Pub. 42004-380) to ensure intrinsic safety.

5. Make a call from the I.S. telephone. If any problems are detected, see the Troubleshooting section.

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External Ringers

The Model 262-001 and 272-001 Intrinsically-Safe Telephones are designed with loud broadcast ringers.

In some instances, however, it is advantageous to install external ringers on these units. Examples of such

situations include areas where the noise level exceeds 95 dB, and locations where a large area must be

covered by a single telephone.

To install an external ringer with the Model 262-001 and 272-001 Telephones, it is necessary to attach an

explosion-proof relay to the telephone line. The relay must not interfere with the direct connection

between the Model 263 IBU and the intrinsically-safe telephone. The relay must also be wired to an

explosion-proof ringer purchased separately by the customer. The customer must install sealed conduit

from the relay to the ringer. Refer to Figure 2. Contact your local electrical distributor for information on

relays and explosion-proof ringers.

Figure 3. An Alternative Explosion-proof Ringer Placement using a

Model 269 I.S. Explosion-Proof Ringer Relay

Figure 2. Placement of Explosion-proof Ringer in the Hazardous Area

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Operation

1. Lift the I.S. telephone handset to place a call.

2. Adjust handset receiver volume control, if necessary, by pressing the handset pressbar.

NOTE:Pressing the handset pressbar increases the volume in increments of 4 dB. The volume starts

at 0 dB and increases to a maximum volume of 8 dB. Pressing the pressbar a fourth time will return

the volume to -4 dB. Pressing the pressbar one more time will return the gain to 0 dB.

3. Dial the desired number.

4. After completion of the call, place the handset on-hook.

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Maintenance

This section includes two troubleshooting charts designed to quickly pinpoint the source of problems.

Troubleshooting

NOTE:It may be advantageous to temporarily connect a Model 262-001 or 272-001 Telephone panel

directly to the output terminals of the Model 263 IBU when troubleshooting. Then, using the charts

below, the cause of the problem should more easily be determined.

Non-Equipment Related Problems

Problem Solution

The I.S. phone is inactive with

no lights on the IBU when the

phone is off-hook.

1. Check the ac power to the Model 263 IBU.

2. Check the ac fuse F4 at the Model 263 IBU.

3. Ensure there is no wiring open at the I.S. phone.

1. If the I.S. phone has a wiring short, the IBU lights will be lit in

the following pattern: O= On, P= Off

ISLOOP

LOCK

HOOK

TELCO

2. If the TELCO line has an open, the IBU lights will be lit in the

following pattern: O= On, P= Off

ISLOOP

LOCK

The I.S. phone has no dial tone.

HOOK

TELCO

The lights on the IBU flash

randomly. The I.S. phone has an intermittent wiring short. The short may be

between the conductors or either/both conductor(s) to ground/shield.

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Equipment-Related Problems

Problem Solution

There is no incoming ring tone. 1. Check the I.S. telephone panel.

2. Check the Model 263 IBU.

No receiver audio, no sidetone,

and cannot hear touch tones

when pressed.

1. Check the I.S. telephone panel.

2. Check the Model 263 IBU.

3. There may be a wiring open or a short in the connecting cable.

Cannot dial out, but can hear

touch tones when pressed. 1. Check the Model 263 IBU.

2. There is no TELCO connection or it is faulty.

I.S. phone appears inactive. 1. Check the I.S. telephone panel.

2. Check the Model 263 IBU.

3. Ensure there is no wiring open in the connecting cable or at the I.S.

phone.

CAUTION

Any field repairs on the intrinsically-safe design of the phone are strictly prohibited. Any such

change will void ALL hazardous approvals. Please contact the GAI-Tronics Field Service Department at

800-492-1212 inside the USA, or 610-777-1374 outside the USA, for the Regional Service Center closest

to you.

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Lightning Protection

Telephone lines are susceptible to lightning strikes and must be properly protected and maintained. On-

premise line protection is usually provided at the building entrance by the responsible telephone company

when installed. It is common that this protection is neglected after installation.

Degradation of conventional protection, such as carbon blocks or gas discharge types, will occur with

each lightning strike. To ensure safe operation, protective elements should be replaced frequently and

checked for proper connection and grounding. Gas discharge types are by far the most robust, cost-

effective means of protection.

The registered I.S. equipment meets all isolation and safety requirements of FCC, Part 68, DOC CS-03,

UL 913, and CSA C22.2-No. 157; however, lightning strikes are not predictable or considered to be a

condition of fault likely to occur in practice as defined by the guidelines for intrinsic safety. Therefore, it

is imperative that the user employ and maintain a proper lightning protection scheme. This is true for all

hazardous area equipment and all telecommunications equipment subject to lightning.

Figure 4. Example of Lightning Protection Design

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