Why Choose the Finder 58.34.9.024.0089SMA ATEX Interface Relay?
The Finder 58.34.9.024.0089SMA is a 24 V DC four-pole relay interface module from the Finder 58 Series, designed for industrial automation, PLC interfacing and electrical control applications where hazardous-area compliance is required. Its complete ordering code is listed in Finder's published catalogue under the ATEX and HazLoc product range.
Featuring four changeover contacts (4 CO / 4PDT), the module allows one control signal to operate four separate switching circuits. It combines an electromechanical relay with a screw-terminal interface socket and is designed for mounting on a standard 35 mm DIN rail.
Unlike standard Finder 58.34 interface modules, which have a general-purpose 7 A contact rating, the hazardous-area version has a 6 A nominal contact rating, with additional current limits depending on the certification, ambient temperature and installation arrangement. The 0089 configuration incorporates a modular timing function and a mechanical indicator, making it a specialised interface solution for suitably designed industrial control systems.
Key Advantages
- ATEX, IECEx and HazLoc-oriented design for appropriately certified hazardous-area installations.
- 24 V DC control supply for industrial PLC and automation systems.
- Four changeover contacts (4 CO / 4PDT) provide flexible multi-circuit switching.
- 6 A nominal contact rating for the hazardous-area 58.34 variant.
- Integrated timing module configuration for applications requiring delayed relay operation.
- Mechanical operating indicator assists with visual inspection.
- Screw-terminal connections provide a secure wiring interface.
- 35 mm DIN-rail mounting supports convenient control panel installation.
- 27 mm module width supports efficient panel layout.
- Silver-nickel (AgNi) contacts provide general-purpose switching performance.
- Removable relay construction supports servicing and replacement.
- Finder 58 Series compatibility simplifies integration into established relay interface systems.
Key Features
- Finder 58 Series relay interface module.
- 58.34 four-pole configuration.
- 24 V DC nominal control voltage.
- Four changeover contacts (4 CO).
- Four-pole double-throw (4PDT) arrangement.
- 6 A rated contact current for the hazardous-area version.
- 15 A maximum peak contact current under specified conditions.
- 250 V AC rated contact voltage.
- 1,500 VA AC1 rated resistive switching capacity.
- 350 VA AC15 switching capacity at 230 V AC.
- Silver-nickel (AgNi) contact material.
- Timer module configuration using Finder 86.30 technology.
- Mechanical operating indicator.
- Screw-terminal socket interface.
- 35 mm DIN-rail mounting to EN 60715.
- IECEx / ATEX hazardous-area product family.
- HazLoc Class I, Division 2 product family.
- IP20 interface protection classification.
- Identification label provision.
- Cadmium-free contacts.
Important hazardous-area rating note: Finder's 58 Series documentation specifies 6 A for a single hazardous-area 58.34 module at the relevant ATEX/IECEx conditions, reducing to 4 A for certain grouped installations at +70 °C. HazLoc ratings are 5 A under the specified +40 °C conditions. These values must not be replaced by the standard non-ATEX 7 A rating.
Exact configuration note: Finder's published price list identifies 58.34.9.024.0089SMA as an ATEX/HazLoc variant. The 58 Series ordering system identifies the 8 option position with the Finder 86.30 timing module and the final 9 with the hazardous-area version incorporating a mechanical indicator. The complete assembly's certification, permitted timing functions and any additional limitations must be checked against the current Finder approval documents.
Designed for Hazardous-Area Control Applications
The Finder 58.34.9.024.0089SMA belongs to the specialist 58 Series interface range intended for electrical equipment operating under defined hazardous-location requirements.
Finder's hazardous-area interface family includes versions designed to meet ATEX and IECEx Ex ec nC requirements and HazLoc Class I, Division 2 classifications. Such applications may include industrial process equipment, chemical handling systems and electrical control panels installed in appropriately classified environments.
Hazardous-area approval is not determined by the relay alone. The complete assembly, including its timer module, wiring, enclosure, temperature limits and installation conditions, must comply with the applicable certification. The module must not be assumed suitable for Zone 0, Zone 1 or other classifications outside its documented approval.
Integrated Timing Capability for Control Sequencing
The 0089 special configuration includes a timing-module option associated with the Finder 86.30 modular timer. This enables timed control functions in compatible relay interface assemblies, supporting applications where relay operation needs to be coordinated with other equipment.
Typical timing requirements include controlled equipment start-up, auxiliary switching delays and process sequencing. The exact selectable timing modes and adjustment range depend on the fitted timer module and should be verified against the appropriate Finder 86.30 documentation.
When a modular timer is installed, the permissible operating temperature may be narrower than that of the relay alone. Finder's 58 Series documentation identifies a −20 to +50 °C ambient range when used with an 86 modular timer, before any additional hazardous-area approval restrictions are considered.
Four Changeover Contacts for PLC and Industrial Interfacing
The Finder 58.34.9.024.0089SMA provides four changeover contact sets, allowing several electrical circuits to be controlled through one interface module.
Each pole includes a common connection, a normally open contact and a normally closed contact. This arrangement is useful where a PLC or control system needs to operate multiple auxiliary outputs, alarm signals or control circuits.
The AgNi contacts support general-purpose switching, while the hazardous-area construction requires the applicable 6 A or lower derated contact limits to be respected. Inductive and DC loads must also be assessed using their appropriate switching ratings.
DIN-Rail Mounting and Screw-Terminal Wiring
The module is designed for installation on a 35 mm DIN rail in accordance with EN 60715. Its 27 mm width supports compact integration into electrical control panels.
The screw-terminal interface provides connections for the relay contacts and control supply. Finder specifies an 8 mm wire stripping length and 0.5 Nm tightening torque for the relevant interface terminal family.
Installation in a hazardous area must follow the complete manufacturer's instructions, including restrictions on energised connection or disconnection, enclosure requirements, approved wiring practices, ambient temperature and the maximum permitted load current.
Typical Applications
- Industrial automation systems requiring hazardous-area-certified components.
- PLC-to-field-equipment relay interfacing.
- ATEX-rated electrical control panels, where the complete installation is compliant.
- HazLoc Class I, Division 2 control applications within the approved conditions.
- Industrial process control and monitoring.
- Timed auxiliary control circuits.
- Equipment sequencing and switching delays.
- Multi-circuit signalling and alarm systems.
- Electrical control interfaces in chemical processing environments.
- OEM industrial control assemblies.
- DIN-rail control panels requiring four changeover contacts.
- Applications using a compatible 24 V DC control supply.
