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ISOMETER® isoMED427x-(PT)

ISOMETER® isoMED427x-(PT)

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ISOMETER® isoMED427x-(PT)

Product catalog summary

Device Features

Monitors insulation resistance for medical IT systems.
Adjustable response values for insulation and load current monitoring.
Includes a locating current injector for fault location systems.
Monitors load and temperature of IT system transformers.
Self-monitoring with automatic alarms and PE connection monitoring.
Compact design with configurable alarm relay and BMS interface.

Intended Use

The ISOMETER® isoMED427x-(PT) series is designed to monitor the insulation resistance of medical IT systems with AC 70…264 V. It also monitors load current and transformer temperature, providing alarms and measured values via the BMS interface. The device does not require additional supply voltage and supports a maximum system leakage capacitance of 5 μF.

Functional Description

The device displays insulation resistance and can show load current and transformer temperature. It signals faults via LEDs and an alarm relay. The internal locating current injector aids in fault location when enabled.

Standards and Certifications

Complies with DIN EN 61557-8, IEC 61557-8, and EN 61373 standards.
Lloyd's Register certification is valid for the spring-type terminal version.

Technical Data

Rated voltage: 250 V, Overvoltage category: III.
Operating altitude: < 2000 m AMSL.
Supply voltage: 100…240 V, Power consumption: 6.5 VA.
Response value for insulation monitoring: 50…500 kΩ.
Load current monitoring: adjustable 5…50 A.
Temperature monitoring with PTC resistors or PT100 sensors.

Interface and Connection

RS-485/BMS interface with a baud rate of 9.6 kBit/s.
Push-wire and screw-type terminal connections available.

Environmental and Mechanical Conditions

Operating temperature: −25…55 °C.
Degree of protection: IP30 for built-in components.

Ordering Information

Available in different configurations with push-wire or screw-type terminals. Accessories include mounting clips and measuring current transformers.

Catalog excerpts

Insulation monitoring device for medical applications

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Device features • Insulation monitoring for medical IT systems • Adjustable response value for insulation monitoring • Locating current injector for insulation fault location systems • Load and temperature monitoring for IT system transformers • Adjustable load current response value • Temperature monitoring with PTC thermistor or bimetal switch • Self monitoring with automatic alarm • Internal/external test button • LEDs: Power On, Alarm 1, Alarm 2 • Configurable alarm relay: N/O or N/C operation selectable • Compact two-module enclosure (36 mm) Intended use ISOMETER®s of the isoMED427x-(PT)...

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Operating elements Device front Operating elements Wiring diagram

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Measuring circuit Measuring circuit (IC1) Control circuit (IC2) Output circuit (IC3) Rated voltage Overvoltage category Operating altitude 250 V Permissible extraneous DC voltage Ufg < DC 300 V < 2000 m AMSL Load current monitoring Rated impulse voltage Rated insulation voltage Protective separation between Response value adjustable 5...50 A Setting values load current measurement Response time, overload (50 % to 120 %) < 5 s Response time, CT monitoring at restart, test or every 1 h Overvoltage category III, 300 V TemPerature monitoring Voltage test (routine test) according to IEC 61010-1 Supply...

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Interface Connection Interface/protocol Baud rate Cable length Cable: twisted pair, one end of shield connected to PE Terminating resistor Device address, BMS bus Switching elements Connection type Nominal current Stripping length Opening force Test opening, diameter Connection properties: rigid flexible without ferrule flexible with ferrule Number 1 changeover contact Operating principle N/C operation / N/O operation Electrical endurance under rated 10,000 cycles operating conditions Rated operational voltage 230 V / 230 V / 24 V / 110 V / 220 V Rated operational current 5 A / 3 A / 1 A / 0.2...

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Ordering data © Bender GmbH & Co. KG, Germany Subject to change! The specified standards take into account the edition valid until 05.2025 unless otherwise indicated. RBENDERBender GmbH & Co. KG Londorfer StraGe 65 35305 Grunberg Germany

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ISOMETER® isoMED427x-(PT)

ISOMETER® isoMED427x-(PT)

Catalog excerpts

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