Bacharach H25-IR manual External Relay Connections, Typical Relay 1 Wiring

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Preparing for Operation	H25-IR

2.7 External Relay Connections

The H25-IR includes four SPDT relays whose relay contacts are rated 3 A at 240 VAC. External alarm devices (e.g., horns, bells, strobe lights, etc.) can be connected to these relays and activated when their associated relay is energized. Refer to Section 2.4.3 Relays.

Locate the external relay connector on rear of unit (refer to Section 1.7.2 Rear View).

Secure the leads from the external device and its power source to the external relay connector as shown in the diagram below. This diagram shows a typical alarm device being connected to Relay 1. Repeat this procedure, as necessary, for the remaining relays.

Typical Relay 1 Wiring

-Each relay may be connected as normally open (NO), or normally closed (NC).

-The relay contacts are rated 3 A at 250 VAC.

-Power for the external alarm devices is supplied from an external power source.

-Jumper the ‘Neutral’ line of an external power source to the ‘Common’ terminals on the relay connector.

-Connect one end of the alarm device to the ‘NO’ terminal of the desired relay.

-The other end of the alarm device is connected to the other leg of the external power source. For protection, install an in-line fuse of the appropriate size and design for the external alarm device being used.

18	Instruction 3015-4342

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Contents H25-IR Infrared Refrigerant Gas Leak DetectorWarranty Register Your Warranty by VisitingTable of Contents Parts and Service AC Power and Grounding Safety PrecautionsHazard Symbols IntroductionWorking Inside the Instrument CleaningExplosive Atmosphere Misuse and Modifications to Instrument Case of MalfunctionOrdering Information Unpacking and Initial ChecksFeatures and Capabilities Functional Overview Leak Rate = Flow Rate x Gas ConcentrationNames and Functions of Components Front ViewRear View Interior Standard Probe Standard Probe with LED and Programmable PushbuttonSmart Probe Smart Probe Keylock Function Menu System System MenuPreparing for Operation Connecting the ProbeConnecting the AC Power Cord Turning on the InstrumentGas Type System SetupMain Menu System Setup Menu Leak UnitsRelays 4 4-20 mA LoopBrightness Pchk ModeReset Defaults ClockSetup Name Configuring the Setups FunctionRange Feedback Mode SetpointCalibration Search Auto ZeroTypical Relay 1 Wiring External Relay ConnectionsMA Current Loop Connector 4-40 mA Current Loop ConnectionPreparing for Operation H25-IR Internal Calibration Selection CalibrationSelecting Internal or External Calibration Calibration Data MenuExternal Calibration Selection and Setup CAL Internal CalibrationExternal Calibration CAL Factor ProcedureMaterial Required Improving PPM Measurement Accuracy using the CAL Factor Adjusting the CAL Factor Restoring Factory CalibrationCalibration H25-IR Initial Setup Using the H25-IRPower OperationSetup Selection Range SelectionVolume Adjustment Searching for a LeakMeasuring the Leak Rate Measuring the PPM LevelWorking with Logged Measurements Logging Measured ReadingsLog Menu Clearing the Log Diagnostics Menu What to Do when a Fault OccursWhat is PCHK? RS-232 CommunicationOperation H25-IR Diagnostics Menu MaintenanceSensor Data Last Fault Pressure Factory MenuIR Emitter Factory Factory MenuLeak Gas Auto GainLeak Rate Leak TempLeak Tempco Sensor CalProbe Type Model SelectFirmware Flashing Memory Items RequiredSelect Setup Communications Select File Load Flash Image Part Replacement Removing the Top CoverFuse Replacement Probe Tip Filter & O-Ring ReplacementInternal Filter Replacement Parts and Service Replacement PartsService Centers United StatesSpecifications CFCs, HCFCs, HFCs and HalogensSpecifications H25-IR Appendix a Factory Defaults ContinuousAppendix a H25-IR H25-IR Appendix a Headquarters Hunt Valley Circle, New Kensington, PA