ISOM Digiware modules

ISOM DIGIWARE modules are the functional building blocks of a modular insulation-control system for IT networks. Each module performs a specific function — permanent monitoring, fault location or display — and assembles on DIN rail according to the installation's needs. The range covers the regulatory functions of the IEC 61557-8 and IEC 61557-9 standards, with Modbus TCP and RS485 communication.

Modular architecture and functions of ISOM DIGIWARE modules

Permanent insulation-monitoring function with the L-60 module

The L-60 module incorporates a permanent insulation monitoring device with a built-in injector, based on OhmScanner technology. Our installation experience confirms that the timestamped measurement history makes preventive diagnosis easier on second-source IT networks. This module continuously assesses the network's insulation level and triggers an alert as soon as the programmed threshold is crossed.

Precise fault location with the F-60 module

The F-60 module provides per-circuit fault location on complex installations. In the field, we find that this function significantly reduces intervention time by avoiding systematic sweeps of the installation. Combined with the L-60 module, it identifies the faulty circuit with no interruption to service.

Display and centralised supervision with the D-55 and D-x5 displays

The D-55 display and its D-x5 variant provide data visualisation via Modbus TCP and power the Digiware modules. Our installation feedback shows that the built-in RS485/Ethernet gateway makes integration into existing supervision architectures easier. The D-x5 display also centralises data from COUNTIS E meters and DIRIS A analysers connected on the same RS485 bus, providing a unified view of electrical quantities over the Ethernet network.

Communication and integration into supervision systems

Modbus TCP and RS485 protocols for interoperability

ISOM DIGIWARE modules communicate natively in RS485 and Modbus TCP. This dual-protocol capability allows integration into building management systems or industrial supervisors with no additional conversion equipment. Our commissioning tests show that the gateway built into the D-x5 display eliminates network-configuration delays.

Scalable composition according to installation criticality

Each ISOM DIGIWARE module can be added independently as needs evolve. We observe that this modular approach favours progressive investment: an installer starts with basic insulation monitoring, then adds fault location and centralised supervision. The standardised DIN-rail polyamide housing guarantees mechanical compatibility with existing modular devices.

Regulatory compliance and fields of application

IEC 61557-8 and IEC 61557-9 certifications

ISOM DIGIWARE modules meet the requirements of the IEC 61557-8 (insulation controllers) and IEC 61557-9 (insulation location) standards. These references define the performance, alarm thresholds and type tests applicable to insulation-monitoring devices on IT networks. Our standard practice favours checking compliance with these standards during the handover of hospital and industrial installations.

Installations concerned by modular insulation monitoring

ISOM DIGIWARE modules are aimed at installations where continuity of service determines personal safety. Typical applications include operating theatres, clean rooms, continuous production lines and critical-infrastructure supply chains. Made-to-measure composition allows the system to be adapted to the specific size and criticality of each site.

Frequently asked questions

What is the difference between the L-60 module and the F-60 module?

The L-60 module provides permanent insulation monitoring with a timestamped history, while the F-60 module adds per-circuit fault-location functionality. The two modules are complementary but independent.

Can the D-x5 display replace a dedicated supervisor?

The D-x5 display centralises data from Digiware modules, COUNTIS E and DIRIS A meters over Ethernet, but it is a display gateway, not a full supervision system with long-term archiving.

Does the L-60 module work without a display?

The L-60 module performs its monitoring and alarm functions autonomously. The D-55 or D-x5 display becomes necessary for local visualisation, configuration and network integration.

Which standard applies specifically to insulation location?

The fault-location function complies with the IEC 61557-9 standard, complementary to IEC 61557-8, which governs insulation monitoring itself.

Can ISOM DIGIWARE modules be combined with other measuring devices?

The D-x5 display natively integrates data from COUNTIS E and DIRIS A meters on the same RS485 bus, providing a consolidated view of energy and insulation quantities with no additional equipment.