Brand: Moore Industries

Moore-SPA2HL Associated IS Programmable Limit Alarm Trip Model: SPA2HLPRG/4PRG/VAC

Name: Moore SPA2HL Limit Alarm Trip - Programmable – Manual
Brand: Moore Industries

Description

Overview

The Moore SPA2HL limit alarm trip is an associated isolated programmable module, part of the Moore Industries product range for process signal conditioning and protection. It provides configurable alarm set points and signal isolation for process transmitters and control signals, protecting downstream equipment and providing visual and relay alarm outputs.

The module is supplied in the programmable version with model reference SPA2HLPRG/4PRG/VAC, allowing set points and alarm behaviour to be configured to the application requirements without hardware changes.

Engineering & Design

Limit alarm trips are used to monitor process signals and provide a discrete contact output when the signal crosses a set threshold, for alarm, interlock, or control functions. The isolation provided by the SPA2HL breaks ground loops between instrumentation and control systems, improving signal integrity in industrial installations.

The programmable configuration of the SPA2HL supports the ‘associated’ instrument concept used in intrinsically safe installations, allowing the device to be installed in the safe area while serving field instruments installed in hazardous areas.

Key Features

Programmable limit alarm trip function
Associated isolated instrument design
Configurable alarm set points
Signal isolation between field and control circuits
Model reference SPA2HLPRG/4PRG/VAC
Suitable for process transmitter monitoring
Alarm output for interlock and annunciation

Applications

Process alarm monitoring and annunciation
Transmitter signal conditioning
Ground loop isolation
Intrinsically safe associated instrument installations
Interlock and trip functions
Signal conversion and protection

Specifications

Specification	Value
Manufacturer	Moore Industries
Model	SPA2HL
Type	Associated isolated programmable limit alarm trip
Model Reference	SPA2HLPRG/4PRG/VAC
Function	Configurable limit alarm with signal isolation
Power Supply	AC powered (VAC)
Application	Process alarm, interlock, isolation

Signal conditioning protects both process and equipment, and the Moore SPA2HL programmable limit alarm trip is a dependable choice, which is why Seven Star LLC supplies the Moore SPA2HL limit alarm trip for process control projects.

The Moore SPA2HL associated programmable limit alarm trip receives the 4-20 mA signal from the hazardous area transmitter and trips the relay when the process value passes the programmed set point. The unit is programmed with the front keys for the set point, the hysteresis and the trip direction, and the relay contacts are wired into the shutdown matrix. The unit is mounted on the DIN rail in the safe area and is powered from the 24 V DC loop.

The SPA2HL unit is certified as the associated apparatus and is mounted in the safe area of the cabinet with the intrinsic safety barrier wiring to the field transmitter. The trip relay is used for the high and the low alarms of the process and the fail-safe state is selectable by the wiring of the output contact. The unit performs the continuous self-check of the input loop and the front LED indicates the healthy condition of the channel.

The SPA2HL trip is used for the overpressure and the underpressure protection of the process vessels, and the two units can be combined for the high/low shutdown with the common alarm bus. The programming of the set point and the hysteresis is carried out without the handheld communicator, and the loop test verifies the trip at the simulated value.

The Moore SPA2HL limit alarm trip is wired with the intrinsic safety barrier of the safe area.

Why Seven Star LLC

Seven Star LLC supplies the Moore SPA2HL programmable limit alarm trip for process control projects across the Gulf, with verified specifications and technical support. Our team assists with configuration selection, installation planning, and spare programmes for signal conditioning hardware.

We serve oil and gas, petrochemical, and process industries with reliable B2B supply of instrumentation and control products throughout the GCC.

Configuration & Application

The programmable set points of the SPA2HL allow the alarm thresholds to be adjusted to the process without hardware changes, reducing the spare inventory needed across different services. The isolation function eliminates ground loops between field instruments and control systems, a common source of measurement noise.

As an associated instrument, the SPA2HL supports intrinsically safe installations by providing the safe-area interface for hazardous area transmitters, extending the life of existing field wiring and instrumentation.

Confirming the Right Model

Moore Industries model strings describe the function, input, output and power options, so the full string on the unit label matters more than the base model name. For this item the reference is SPA2HLPRG/4PRG/VAC. The “VAC” section indicates an AC-powered unit, so check the supply voltage available in the panel before ordering a replacement, because a DC-powered variant uses a different option code. When replacing an existing trip, also record the configured input type, range, set points, deadband and relay action, as these are stored in the unit and will not transfer automatically to the new one.

Installation Guidance

Mount the unit in the safe area as an associated apparatus, and follow the entity parameters and control drawing in the manufacturer documentation when connecting hazardous-area circuits.
Keep intrinsically safe field wiring separated from non-IS wiring, with clear marking and correct terminal segregation.
Confirm the AC supply voltage and earthing arrangement against the unit label before power-up.
Wire relay contacts to the shutdown or alarm system according to the fail-safe philosophy of the loop.

Configuration and Proof Testing

Set the alarm points, deadband and trip direction using the programming method described in the Moore Industries manual, then document the final settings in the loop file. Proof test the trip by injecting the input with a calibrated source, moving it slowly through each set point and confirming that the relay changes state at the right value and resets after the deadband. Repeat the test at the interval defined in your safety or maintenance procedure.

Troubleshooting

Relay chattering near the set point: increase the deadband or check for noise on the input signal.
Unexpected alarm on start-up: review the trip direction and the relay failsafe setting.
Input reading incorrect: verify the input range configuration and the loop wiring, including shield grounding at one end only.

Where It Is Used in Oman and the GCC

A Moore SPA2HL limit alarm trip is a practical way to add independent high or low alarms to pressure, level and temperature loops on wellhead facilities, gas plants and tank farms, where the transmitter sits in a classified area and the logic is housed in a safe-area marshalling cabinet.

Supply from Seven Star LLC

Seven Star LLC supplies Moore Industries signal conditioning and alarm trip modules for maintenance and project work in the region. Share the full model string from the label and we will confirm the matching option code before dispatch.

Request a Quote for Moore-SPA2HL Associated IS Programmable Limit Alarm Trip Model: SPA2HLPRG/4PRG/VAC

For the Moore SPA2HL limit alarm trip, SPA2HL programmable or any related control and instrumentation requirement, contact the Seven Star LLC team. Submit a formal inquiry through our RFQ page with your configuration and application details, and our specialists will respond with a detailed commercial proposal and the manufacturer documentation.

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About brand

Signal conditioning is what Moore Industries has built in North Hills, California since 1968: temperature transmitters, signal isolators, alarm trips and the interface instruments that sit between field sensors and a DCS or PLC. Seven Star LLC, an independent supplier in Oman, lists Moore Industries temperature transmitters, limit alarm trips, isolators and a PID backup controller, and sources units and replacements by full model number.

Moore Industries product families on this page

The manufacturer's catalog is arranged by function, and many of the items listed here map onto it directly:

Temperature transmitters: the TRX, and the STZ functional safety dual input smart HART transmitter
Alarm trips: the SPA2 programmable limit alarm trip, including an SPA2 with HLPRG input and four relay outputs
Signal isolators, repeaters and converters: the SIX
PID controllers and backup stations: the 535 in 1/4 DIN format

Other catalog groups include temperature assemblies and sensors, I/P and P/I converters, remote I/O, HART gateways and interfaces, indicators, and fieldbus device couplers.

Where Moore Industries instruments are used

These are control room and marshalling cabinet devices, plus field-mounted transmitters. Typical jobs are isolating a 4-20 mA loop between two systems, converting a thermocouple or RTD signal for a DCS input, adding an independent high or low trip next to the control system, and keeping a control loop running on a backup station when the main controller is out of service. Process plants in oil and gas, chemicals and power across the GCC use them for exactly these tasks.

Ordering Moore Industries instruments: what we need

Moore Industries model numbers are built from fields separated by slashes: unit, input, output, power and options, followed by the housing code in brackets. Every field matters. Send the complete string from the label, the serial number, and for programmable units the input type and range you want set. State any hazardous area or functional safety requirement, because approved versions are ordered with their own option codes.

Browse Moore Industries products by category: Temperature Instrumentation, Controllers & Data Acquisition, Isolator & Barrier.