External Relay Connections | Bacharach H25-IR specification

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

Contents

H25-IR Infrared Refrigerant Gas Leak Detector Warranty Register Your Warranty by Visiting Table of Contents Parts and Service AC Power and Grounding Safety PrecautionsHazard Symbols Introduction Working Inside the Instrument CleaningExplosive Atmosphere Misuse and Modifications to Instrument Case of Malfunction Ordering Information Unpacking and Initial Checks Features and Capabilities Functional Overview Leak Rate = Flow Rate x Gas Concentration Names and Functions of Components Front View Rear View Interior Standard Probe Standard Probe with LED and Programmable Pushbutton Smart Probe Smart Probe Keylock Function Menu System System Menu Preparing for Operation Connecting the ProbeConnecting the AC Power Cord Turning on the Instrument Gas Type System SetupMain Menu System Setup Menu Leak Units Relays 4 4-20 mA Loop Brightness Pchk ModeReset Defaults Clock Setup Name Configuring the Setups FunctionRange Feedback Mode Setpoint Calibration Search Auto Zero Typical Relay 1 Wiring External Relay Connections MA Current Loop Connector 4-40 mA Current Loop Connection Preparing for Operation H25-IR Internal Calibration Selection CalibrationSelecting Internal or External Calibration Calibration Data Menu External Calibration Selection and Setup CAL Internal Calibration External Calibration CAL Factor ProcedureMaterial Required Improving PPM Measurement Accuracy using the CAL Factor Adjusting the CAL Factor Restoring Factory Calibration Calibration H25-IR Initial Setup Using the H25-IRPower Operation Setup Selection Range Selection Volume Adjustment Searching for a Leak Measuring the Leak Rate Measuring the PPM Level Working with Logged Measurements Logging Measured ReadingsLog Menu Clearing the Log Diagnostics Menu What to Do when a Fault OccursWhat is PCHK? RS-232 Communication Operation H25-IR Diagnostics Menu MaintenanceSensor Data Last Fault Pressure Factory MenuIR Emitter Factory Factory Menu Leak Gas Auto GainLeak Rate Leak Temp Leak Tempco Sensor Cal Probe Type Model SelectFirmware Flashing Memory Items Required Select Setup Communications Select File Load Flash Image Part Replacement Removing the Top Cover Fuse Replacement Probe Tip Filter & O-Ring Replacement Internal Filter Replacement Parts and Service Replacement Parts Service Centers United States Specifications CFCs, HCFCs, HFCs and Halogens Specifications H25-IR Appendix a Factory Defaults Continuous Appendix a H25-IR H25-IR Appendix a Headquarters Hunt Valley Circle, New Kensington, PA