Accessories

An accessory for an ATyS source-transfer switch is any add-on component that extends the capabilities of an already-installed transfer switch. These accessories cover four main functions: position signalling via auxiliary contacts, remote supervision via Modbus RS485 and Modbus TCP protocols, motorisation not fitted on certain models, and enhancement of the switching logic with additional ATS controllers. All of them comply with the Modbus RS485/TCP compatibility standard and are mounted on DIN rail in the electrical panel.

Communication modules and remote supervision of ATyS transfer switches

Modbus RS485 and Modbus TCP protocols for system integration

Modbus RS485 and Modbus TCP communication modules connect ATyS source-transfer switches to a supervision system or a PLC. Our installation experience confirms that this integration avoids fully replacing a working transfer switch when a remote-monitoring need arises during a project. The polyamide housing fixes onto a DIN rail in the electrical panel, standardising wiring and reducing intervention time.

Compatibility and connection of communication modules

Modbus RS485/TCP compatibility guarantees interoperability with building management systems (BMS) and industrial supervision software. In the field, we observe that this dual-protocol option allows the network architecture to be adapted to RS485 distance constraints or to an existing Ethernet TCP infrastructure.

Auxiliary contacts and position signalling

Status-feedback function for installation safety

Position-signalling auxiliary contacts transmit the actual state of the source-transfer switch to indicator lights, relays or a PLC. Our standard practice favours this type of accessory when a design office needs to confirm source 1 or source 2 position on an electrical panel schematic. This information proves critical for fast diagnosis in the event of a source fault.

Motorisation kits and complementary ATS controllers

Functional extension without replacing the transfer switch

Motorisation kits turn a manual transfer switch into a remotely controlled device, while complementary ATS controllers enhance the switching logic with time-delay, source-priority and periodic-testing functions. Feedback from installers confirms that this modular approach preserves the initial investment while meeting growing specifications.

Motorisation applications and advanced source management

We recommend complementary ATS controllers for installations where return-to-source time delays need to be adjusted after commissioning, or where automatic transfer tests need to be scheduled without manual intervention. This flexibility is particularly relevant for hospital infrastructure and data centres, where continuity of service requires gradual functional upgrades.

Frequently asked questions

Can a Modbus module be added to an ATyS transfer switch already in service?

Yes, the Modbus RS485 and Modbus TCP communication modules are designed to integrate with existing ATyS source-transfer switches without modifying the main device, subject to reference compatibility.

What is the difference between a built-in ATS controller and a complementary ATS controller?

The built-in ATS controller equips the original transfer switch, whereas the complementary ATS controller is added downstream to extend source-management functions on an installation already fitted with a basic transfer switch.

Does the modules' polyamide housing withstand electrical panel conditions?

The DIN-rail polyamide housing is specifically sized for the environment of industrial electrical panels, with mechanical and thermal strength suited to standard modular-equipment use.

Do the auxiliary contacts allow supervision without a communication module?

Auxiliary contacts provide wired position signalling to PLC inputs or indicator lights, but do not constitute network supervision; this requires a Modbus RS485 or Modbus TCP module.