Edwards Signaling 879EX User Manual

Cheshire, CT 06410 203-699-3300 (Ph)
203-699-3365 (Cust. Serv. Fax)
203-699-3078 (Tech. Serv. Fax)

Installation Instructions for Explosion-Proof

Adaptahorn Catalog Series 878EX and 879EX

Description and OperationDescription and Operation

Description and Operation

Description and OperationDescription and Operation

Edwards explosion-proof Adaptahorn is a heavy-duty high
decibel vibrating horn intended for use where a distinc­tive audible signal is required in a hazardous location. It
is UL and cUL listed and is designed for use in Class I,
Division 1 and 2, Groups B, C, and D; and Class II, Division
1 and 2, Groups F and G, Class II, Division 1, Group E, and
Class III, Division 1 and 2 hazardous locations.The horns
are in an Outdoor Type 4X rated enclosure (Outdoor Type
4X applies to general signaling use in non-fire alarm ap­plications). The Adaptahorn may be mounted to any solid
surface.

Electrical SpecificationsElectrical Specifications

Electrical Specifications

Electrical SpecificationsElectrical Specifications

dB Rating

Cat. Number Input Power Current at 10 ft.

878EX-R5 240V AC 0.065A 97
878EX-N5 120V AC 0.13A 97
878EX-G5 24V AC 0.625A 97
878EX-E5 12V AC 1.25A 97
879EX-P1 125V DC 0.025A 97
879EX-K1 48V DC 0.07A 97
879EX-J1 32V DC 0.13A 97
879EX-G1 24V DC 0.16A 97
879EX-E1 12V DC 0.27A 97
879EX-C1 6V DC 0.7A 97

• One explosion-proof outlet box suitable to the
hazardous location

• Two 3/4-14 National Pipe Taper (NPT) nipple
connectors.

1. Mark two mounting holes per dimensions in Figure 1.
Secure Adaptahorn to solid surface using the furnished
mounting brackets and hard ware suitable for the
mounting location. The 3/8" diameter fasteners and
washers are not supplied.

2. See Figure 1. Power source connections are made in
the explosion-proof outlet box. Remove outlet box
cover.

CAUTIONCAUTION

CAUTION

CAUTIONCAUTION

Do not apply power to the unit until installation is
completed and cover is secured.

3. Feed external power wires through the 3/4 inch conduit
which is attached to the outlet box with one of the
3/4-14 NPT connectors.

4. Feed Adaptahorn power connection wires through the
other 3/4-14 NPT connector which connects the
Adaptahorn to the outlet box.

5. Connect power source wires to Adaptahorn power
connection wires. Connect ground lead to earth
ground.

6. Replace outlet box cover and tighten securely.

Ambient Temperature:

The UL Hazardous Locations Listing is “only for use under
normal atmospheric conditions in an ambient tempera­ture within the range of -25C (-13F) to +40C (+104F)”; and
within these ambient temperatures, Edwards recommends

-4C (+25F) and higher for its function as an audible signal
appliance.

InstallationInstallation

Installation

InstallationInstallation

For power connections in a hazardous location, the fol­lowing external parts will be required:

• 3/4 inch conduit of sufficient length to contain
power source wires within hazardous location

Maintenance and Maintenance and

Maintenance and

Maintenance and Maintenance and

Examine the unit periodically for accumulation of dirt.
Clean if necessary.

The Adaptahorn should be tested monthly to ensure con­tinuous service.

TT

T

TT

estest

est

estest

P/N P-047550-0304 ISSUE 5 © 2003

PAGE 1

Figure 1. Signal Mounting Details

Contacting Edwards:

Phone: [phone]

E-Mail: [e-mail]

[e-mail]

Website: http://www.edwards-signals.com

P/N P-047550-0304 ISSUE 5 PAGE 2