ZENITEL SPA-REL-V5 Relay Interface To Alarms From Motorola SLR Repeater, DIN Rail Mount, 1 Relay Per SLR Repeater (2340120016)

The SPA-REL-V5 is best understood as an infrastructure accessory rather than a standalone communications product. Its purpose is not to transmit or receive voice traffic, but to make repeater alarm conditions usable by external equipment in a clean, hardware-oriented format. The repeated product description across multiple sellers is unusually specific: “Relay interface to alarms from Motorola SLR repeater, DIN rail mount, 1 relay per SLR repeater.” That wording suggests a single-function accessory built for fixed-installation radio sites rather than general-purpose relay control.

This kind of interface matters in professional repeater deployments because repeaters are often installed at sites where alarm monitoring, fault reporting, building management, general alarm, or public-address supervisory systems need to know when a communications asset has changed state. Motorola’s own SLR 5000 series materials confirm that the repeater family includes external alarm ports, which are exactly the sort of signals a relay interface accessory would be expected to expose or adapt.

The DIN rail mount designation is also significant. DIN-rail hardware is widely used in electrical cabinets, equipment racks, industrial panels, and communications control enclosures because it simplifies installation, replacement, and cable management. Since the SPA-REL-V5 is described as DIN-rail mounted, it is clearly aimed at permanent infrastructure integration rather than bench-top or portable use.

Design and Features

Purpose-built relay interface for Motorola SLR repeater alarms

The core function of the SPA-REL-V5 is stated directly in the verified product descriptions: it is a relay interface to alarms from Motorola SLR repeater. The phrase “1 relay per SLR repeater” strongly implies a one-to-one mapping between repeater alarm presentation and relay output at the module level. Because I did not find a primary Zenitel datasheet for this exact V5 model, I cannot responsibly claim the precise alarm logic, contact type, or which individual repeater alarm states are exposed. But the basic operating role is clearly supported by the product naming and listings.

DIN-rail infrastructure format

The DIN rail mount format places the SPA-REL-V5 in the same broad hardware family as other Zenitel relay accessories. Zenitel’s official SPA-REL-V4 product page confirms that Zenitel makes rail-mounted relay modules for technical system integration, and it lists NS-35 rail mounting, 24 VDC input coil, and potential-free contacts for that related model. While that does not prove identical specifications for the SPA-REL-V5, it does reinforce that Zenitel’s relay interface design philosophy is built around control-cabinet installation and relay-based signaling.

Likely role in external alarm and supervisory systems

Given the product description and the Motorola SLR repeater’s documented alarm/output capabilities, the SPA-REL-V5 is most plausibly used where a repeater site must signal alarm conditions to other equipment, such as site monitoring panels, annunciators, intercom/PA systems, relay logic, or supervisory controllers. This is a technical inference, but it is strongly grounded in the product description and Motorola’s documentation that the repeaters include external alarm ports.

Technology and Specifications

What is directly confirmed

The following points are directly supported in the sources reviewed:

• Product name: SPA-REL-V5 Relay Interface To Alarms From Motorola SLR Repeater.
• Part number: 2340120016.
• Mounting type: DIN rail mount.
• Configuration note: 1 relay per SLR repeater.
• Compatibility target: Motorola SLR repeater alarms.

What Motorola officially confirms on the repeater side

Motorola’s SLR 5000 series repeater materials state that the platform has external alarm ports and an auxiliary power output to ease site installation. Motorola’s quick-start guide also identifies rear-panel external connectors on the repeater, reinforcing that the repeater family is designed to interface with external equipment.

That is important because it establishes the hardware context for accessories like the SPA-REL-V5. A relay interface of this type would only make sense if the host repeater family exposed alarm or control signals externally, and Motorola’s published documentation confirms that it does.

What remains unverified publicly

I was not able to confirm, from a publicly accessible official Zenitel product page or datasheet for the exact SPA-REL-V5, details such as:

• relay contact rating,
• coil voltage,
• contact form,
• exact physical dimensions,
• wiring terminal format,
• supported SLR models beyond the generic “Motorola SLR repeater” wording,
• exact alarm-state mapping.

Because those exact technical specifications were not recoverable from a primary source here, they should be verified directly with Zenitel or an authorized distributor before the product is used in a design package or procurement decision. The absence of a public primary datasheet is the main factual limitation around this product.

Applications and Use Cases

Repeater site alarm integration

The clearest use case is at a fixed repeater site where a Motorola SLR repeater’s alarm states need to be surfaced to another electrical or supervisory system. The SPA-REL-V5 would be relevant in installations where a dry-contact or relay-style alarm handoff is easier to integrate than native repeater signaling. This is a grounded inference based on the product description and the documented presence of external alarm ports on SLR repeaters.

Public address, intercom, or site safety systems

Because Zenitel is widely associated with critical communication, public address, and safety/security infrastructure, the SPA-REL-V5 is likely intended to bridge repeater alarm events into larger site systems where alarm awareness matters. Zenitel’s broader product ecosystem includes public address and alarm-related relay modules, which supports this interpretation.

Industrial cabinets and communications shelters

The DIN rail mount form factor makes the product well suited to repeater shelters, control cabinets, industrial equipment rooms, and integrated site racks. These are the environments where rail-mounted relay hardware is most commonly deployed because it keeps wiring orderly and makes maintenance easier. The DIN-rail description is explicit in the product listings, while the industrial-cabinet suitability is a standard inference from DIN-rail practice.

Advantages / Benefits

Clean relay-based interfacing

The most obvious benefit is that the module appears to provide a relay-based interface for repeater alarms. Relay outputs are widely understood by system integrators and are often easier to connect to third-party alarm systems than vendor-specific electronics or software-only monitoring. This is an inference from the “relay interface” naming, but it is the central logic of the product category.

Infrastructure-friendly mounting

A DIN rail mount module is easier to install neatly in control cabinets and communications racks than loose adapters or custom wiring assemblies. This improves maintainability and aligns well with site-engineering practices.

Repeater-specific positioning

The wording “to alarms from Motorola SLR repeater” and “1 relay per SLR repeater” suggests the SPA-REL-V5 is not a generic relay box, but a site-integration accessory intended specifically for that Motorola repeater family. That repeater-specific positioning can simplify design decisions for installers who do not want to engineer a custom alarm breakout solution from scratch.

FAQ Section

What is ZENITEL SPA-REL-V5 Relay Interface To Alarms From Motorola SLR Repeater (2340120016)?

It is a DIN-rail-mounted relay interface described as providing a connection to alarms from a Motorola SLR repeater, with one relay per SLR repeater. Its purpose is to let repeater alarm information be used by external systems in relay form.

How does ZENITEL SPA-REL-V5 work?

Based on the product description, it works by taking alarm-related signals from a Motorola SLR repeater and presenting them through a relay interface suitable for external alarm or control integration. Motorola documentation confirms that SLR repeaters include external alarm ports, which is the underlying hardware basis for this type of accessory.

Why is ZENITEL SPA-REL-V5 important?

It is important because repeater sites often need hardware alarm integration with supervisory systems, annunciators, or control infrastructure. A repeater-specific DIN-rail relay interface can simplify that integration compared with building a custom alarm breakout solution. This is an inference, but it follows directly from the product’s stated role.

What are the benefits of ZENITEL SPA-REL-V5?

Its main benefits appear to be repeater-specific alarm interfacing, DIN-rail mounting, and relay-based integration for external systems. Those benefits are based on the verified product description and the Motorola SLR repeater’s documented external alarm capability.

Is there one SPA-REL-V5 per repeater?

The product description explicitly says “1 relay per SLR repeater,” so the intended deployment appears to be one module or one relay path per repeater unit. Exact multi-repeater cabinet design details should still be confirmed with the seller or manufacturer.

Summary

The ZENITEL SPA-REL-V5 Relay Interface To Alarms From Motorola SLR Repeater, DIN Rail Mount, 1 Relay Per SLR Repeater (2340120016) is a niche but important integration accessory aimed at fixed repeater infrastructure. The public information that could be verified consistently identifies it as a DIN-rail relay interface for Motorola SLR repeater alarms, designed around a one-relay-per-repeater concept. Motorola’s own SLR documentation confirms that the repeater family includes external alarm ports, which makes the SPA-REL-V5 a logical interface component for site alarm integration. The main caveat is that a public primary Zenitel datasheet for the exact V5 model was not available in the sources I could verify, so detailed engineering specifications should be confirmed before procurement or design signoff.