V-212/0399Page 1 of 2

ADDRESSABLE RELAY MODULE

The OXA-503RM is an addressable, plug-in module for use with the OXM-501motherboard (P/N 9976253), which accom-modates up to three OXA-503RMs.

Installation and WiringThe OXA-502RM mounts on a standard

surface 2-gang electrical box or a recessed4" square box with 2-gang adaptor.

Testing and MaintenanceRoutine functional tests may be performed

by providing the appropriate input to theAUTOCALL TFX system and verifying relayoperation.

AUTOCALL ®

OXA-502RM and OXA-503RM

Featuresnn Provides One Form C

Programmable RelayContactnnMonitored and

Controlled from aSignaling LineCircuit (AddressableLoop)nn Powered By

Signaling LineCircuit. No ExternalPowernn LED Indicates Relay

OperationnnHigh EMF/RFI Noise

ImmunityOXA-502RMFront View

OXA-502RMRear View

General InformationThe AUTOCALL OXA-502RM and OXA-

503RM modules provide a form C relay con-tact for annunciation and auxiliary controlpurposes with the AUTOCALL TFX series firealarm systems. Both are monitored and con-trolled as an addressable device on an AU-TOCALL TFX system signaling line circuit.The relay contact may be programmed tooperate in conjunction with any single orgroup of input events.

Each relay monitor module uses one of126 available addresses on an AUTOCALLTFX signaling circuit. It responds to regularpolls from the control panel and reports itstype and status. A flashing LED indicatesthat the module is in communication with thecontrol panel. Up to 99 modules can beplaced on an individual circuit.

The OXA-502RM is an addressable fieldmodule and is provided with an attractiveplastic cover with eggshell finish. The statusLED is visible through the plastic cover.

Listings & Approvals• UL Listed:

File Number: S374 (OXA-502RM)File Number: S2561 (OXA-503RM)

• CSFM No. 7300-1493:152

• MEA No. 415-92-E Vol.VI

• FM ID No. OB2A9.AY

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ADDRESSABLE RELAY MODULE

OXA-502RM AddressableRelay Module, poweredrelay circuit

OXA-502RM AddressableRelay Module, dry contact

Addressable Relay Module Wiring Diagram (OXA-502RM)

SpecificationsOperating Temperature: 32°F/120°FOperating Humidity: 85%(noncondensing)Relay Contact Rating: 2 amp at 24VDC, 0.6 amp at 120VACAddressable Loop Current: Standby Current Alarm Current

0.18mA0.18mA

Cover Material: Polycarbonate ABS AlloyContact Surge Protection: 250V MOVShipping Weight: 3.6 ouncesDimensions: 4.5"H x 4.5"W x 1.3"D

Ordering InformationPart No. Model Description976258 OXA-502RM Addressable relay module, mounted to two gang plate976259 OXA-503RM Addressable relay module, plug-in style9976253 OXM-501 Motherboard kit. Provides connections for up to three

OXA-503RM addressable relay modules.976170 - Auxiliary mounting backplate. Provides mounting for up to

four OXA-501 motherboards.Please reference both the model and part numbers when ordering.

835 Sharon Drive, Westlake, Ohio 44145Phone: (440) 899-5445; FAX (440) 871-2301

http://www.grinnellfire.comA tyco INTERNATIONAL LTD. COMPANY

AUTOCALL ®

OXA-502RM and OXA-503RM

This literature does not cover all the variations in the equipment described, nor does it provide for every possible contingency to be met in connection with installation, operation andmaintenance. All specifications and listings are subject to change without notice. If you need more information on this product, or have a question, contact Grinnell Fire Protection Systems Com-pany, Westlake, Ohio 44145. © 1999 Grinnell Fire Protection Systems Company, a Division of the Grinnell Corporation. AUTOCALL® is a registered trademark of the Grinnell Corporation.

Notes:1. All wiring to conform to current National

Electrical Code, NFPA 70, state, andlocal building code requirements andapplicable notes. When installed tocomply with N.E.C. Article 760, Part Aand Part B, these circuits are classifiedas non-power limited. When installed tocomply with N.E.C. Article 760, Part Aand Part C, these circuits are classifiedas power limited.

2. The red LED (seen from front) indicatesthe following when addressed by thecontrol panel:- When scanning normally (relay

deactivated), the LED will illuminateonce every two seconds when themodule address is scanned.

- When the relay is initially activated, theLED will illuminate for a short period,then illuminate once every twoseconds when the address of themodule is scanned. The LED will bebrighter than when the relay isdeactivated.

3. Terminals marked “N.C.” are not used.4. Set address according to site plan.

Switch ON Values:Sw. Pos. Value Sw. Pos. Value

1 1 5 162 2 6 323 4 7 644 8

5. Break wire run to provide supervision.6. For nonpower-limited circuit application,

add blank label to cover the “POWER-LIMITED” reference. Make sure that allpower-limited/Class 2 wiring is separatedat least 0.25 inches from any wiring thatis not power limited. Use cable ties orother permanent means to secure wiring.

7. Use only UL Listed 24V power supplysuitable for fire protective signalingservice.