Gai-tronics 703-007 User Manual

Pub. 42004-687L2B

GAI-TRONICS® CORPORATION

A HUBBELL COMPANY

Model 703-007 SmartSeries RTU

Enclosure

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. GAI­Tronics 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 Model 703-007 RTU (Remote Terminal Unit) Enclosure is designed to be a component in
GAI-Tronics SmartSeries system. It mates with a SmartSeries handset or speaker amplifier to form a
SmartSeries station.

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When connected to a SmartSeries system, the station operates as a standard multi-party Page/Party
device. In addition, it supports supervised input circuits and a relay output (supervision optional). The
following configurations are possible:

• One supervised input circuit and one supervised relay output (factory setting)

• Two supervised input circuits and no relay output

• Two supervised input circuits and one non-supervised relay output

OTE: The relay output circuit is intended for use with GAI-Tronics-approved equipment. The circuit

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may not support supervision of equipment that is not approved by GAI-Tronics.

How to Use the Assembly/Model

This section describes applications for the Model 703-007 SmartSeries RTU Enclosure, its hardware,
software configuration, interfaces and operation.

Application

The SmartSeries Station RTU is designed for use with the SmartSeries amplifiers and handsets in a
standard multi-party Page/Party
and deactivating a single relay circuit located in the SmartSeries station enclosure. This circuit is
referred to as a relay output. Terminal block TB3, located on the rear panel of the station enclosure,
provides an interface with this relay.

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system. It is also possible to control an external device by activating

GAI-Tronics Corporation 400 E. Wyomissing Ave. Mohnton, PA 19540 USA

610-777-1374  800-492-1212  Fax: [phone]

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

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In addition to the relay output capability, the RTU also provides two inputs. These circuits provide an
interface to dry contact switches, (e.g., a pull box) that are monitored within the SmartSeries station. The
SmartSeries station reports any switch activation to the Master Control Unit (MCU).

The relay output is factory-set to be supervised through input #1. Refer to Figure 1. However, you may
elect to use input #1 by disconnecting supervision for the relay output.

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Figure 1.

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Hardware Configuration

The SmartSeries RTU allows three choices of operational configurations. Select the configuration that
best suits your need for circuits. The following table lists the RTU configurations:

Configuration Inputs Outputs

1
2
3

Configuration 1

One supervised input One supervised relay output (factory setting)

Two supervised inputs No relay output

Two supervised inputs One non-supervised relay output

In the first configuration, the relay output is supervised to continually ensure the integrity of the external
circuit. The first input, IN 1, is used to support supervision of the relay output circuit. This wiring
method requires the use of a 20 k-ohm, 2-watt resistor placed in parallel to the relay output device (e.g. a
beacon or strobe) as shown in Figure 2.

Figure 2. Beacon or Strobe

Wire the terminating resistor as close as possible to the beacon. Supervision is performed during non­activation of the relay output using IN 1. The second input, IN 2, remains available for detecting switch
activations. The following section describes switch wiring choices. The RTU provides 120 V ac for
beacon power on pins TB3-28, TB3-29, and TB3-30.

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OTE: This configuration is hardwired at the factory.

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Model 703-007 SmartSeries RTU Enclosure Page 4 of 12

Configuration 2

The second configuration uses two supervised input
circuits and does not make use of the single relay
output. This configuration is accomplished by
interfacing to terminal block TB3-23 and TB3-24 for
IN 1 and TB3-25 and TB3-26 for IN 2.

The external dry contact switch, either normally open
or normally closed respectively, should be in parallel to

a 15 k-ohm resistor as shown in Figure 3.

A 5.1 k-ohm resistor should be in series to the 15
K-ohm resistor. This provides a voltage divider
network used to detect a short or open across the
external circuit’s cabling.

This configuration requires that the orange wire from
TB3-23 going to the relay output circuit be
disconnected so as not to interfere with supervised
operation.

Another method of performing supervision using
multiple switches is shown in Figure 4. This method
requires only one 20 k-ohm resistor that is placed in
parallel to multiple normally open dry contact switches
at the end of line (EOL).

Figure 4. Input Line Supervision Multiple Switch - Example

Figure 3. PLC or Switch Box

Normally Open and Normally Closed - Example

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