ISOSCAN® EDS551
- Insulation fault locator for medical IT systems in accordance with IEC 60364-7-710 and IEC 61557-9
- Monitoring of insulation resistance per measurement channel
- Insulation fault localisation ≤ 5 seconds in accordance with IEC 61557-9
- Additional measurement of leakage capacitance and impedance per measurement channel
- Integrated current transformers
- 4 or 6 measuring channels
The ISOSCAN® EDS551 is an insulation fault locator with six integrated current transformers for the precise localisation of insulation faults in un-earthed power supply systems (IT systems). It enables rapid and reliable fault identification within the monitored IT system.
If the insulation resistance falls below a threshold value, the ISOSCAN® EDS551 automatically triggers an alarm. To use the EDS551, an ISOMETER® of the type isoMED527 or LIM7 is required, which injects the necessary measurement signal into the network.
The ISOSCAN® EDS551 is available in two device variants. In the basic version, the alarm is triggered at a fixed threshold value of 50 kΩ. In the version with function module A activated, the alarm value can be flexibly set between 50 and 200 kΩ per measurement channel. Additionally, this version measures the leakage capacitance and impedance per measurement channel.
Measurement values and alarms are made available to other bus participants via the Bender Smart Connect (BSC) RS-485 interface. For display and alarm functions, the use of special indicator and test combinations (e.g. CP305) is recommended in order to comply with the relevant standards.
The ISOSCAN® EDS551 features an integrated bus terminating resistor for the RS-485 interface, which can be activated via an internal switch. The current status of the bus termination can be conveniently displayed via the device interface.
The ISOSCAN® EDS551 is equipped with an NFC interface. This allows the device to be configured using the Bender Connect app, both when powered and when unpowered. In addition, device information can be read out, data backups created and function modules installed.
The maximum permissible mains leakage capacitance is 5 μF. Individual parameterisation must be carried out in each case to adapt the device to the on-site system and operating conditions, in order to meet the requirements of the standards.
- Insulation fault locator for medical IT systems in accordance with IEC 60364-7-710 and IEC 61557-9
- Monitoring of insulation resistance per measurement channel
- Insulation fault localisation ≤ 5 seconds in accordance with IEC 61557-9
- Additional measurement of leakage capacitance and impedance per measurement channel
- Integrated current transformers
- 4 or 6 measuring channels
The ISOSCAN® EDS551 is an insulation fault locator with six integrated current transformers for the precise localisation of insulation faults in un-earthed power supply systems (IT systems). It enables rapid and reliable fault identification within the monitored IT system.
If the insulation resistance falls below a threshold value, the ISOSCAN® EDS551 automatically triggers an alarm. To use the EDS551, an ISOMETER® of the type isoMED527 or LIM7 is required, which injects the necessary measurement signal into the network.
The ISOSCAN® EDS551 is available in two device variants. In the basic version, the alarm is triggered at a fixed threshold value of 50 kΩ. In the version with function module A activated, the alarm value can be flexibly set between 50 and 200 kΩ per measurement channel. Additionally, this version measures the leakage capacitance and impedance per measurement channel.
Measurement values and alarms are made available to other bus participants via the Bender Smart Connect (BSC) RS-485 interface. For display and alarm functions, the use of special indicator and test combinations (e.g. CP305) is recommended in order to comply with the relevant standards.
The ISOSCAN® EDS551 features an integrated bus terminating resistor for the RS-485 interface, which can be activated via an internal switch. The current status of the bus termination can be conveniently displayed via the device interface.
The ISOSCAN® EDS551 is equipped with an NFC interface. This allows the device to be configured using the Bender Connect app, both when powered and when unpowered. In addition, device information can be read out, data backups created and function modules installed.
The maximum permissible mains leakage capacitance is 5 μF. Individual parameterisation must be carried out in each case to adapt the device to the on-site system and operating conditions, in order to meet the requirements of the standards.
Features
Measured values
- Insulation resistance
- Leakage capacitance
- Impedance
Alarms
- Insulation resistance: 50…200 kΩ
Display and operation
- Signalling LED for each measurement channel
- Status LED for operation and bus activity
- Simple configuration via the Bender Connect app, RS-485 interface and NFC
- Expandable with external signalling and test combinations (e.g. COMTRAXX® CP305); recommended for installation on or inside the control cabinet
Interfaces
- RS-485 interface Bender Smart Connect (BSC)
- NFC interface for configuring the device whilst powered on or off using the Bender Connect app
Supply voltage
- Supply voltage DC 24 V
Applications
- Medical IT systems in accordance with IEC 60364-7-710, IEC 61557-9 and DIN VDE 0100-710, and control circuits
- Insulation fault detection in AC and AC/DC IT systems
ISOSCAN® EDS551 Variant(s)
| Type | Active measurement channels | Enabled function module | Supply voltage | Design | Art. No. |
|---|---|---|---|---|---|
| EDS551-6 | 6 | -- | DC 24 V | 12 DU | B71080651 |
| 6 | A | B71080652 | |||
| EDS551-4 | 4 | -- | B71080451 | ||
| 4 | A | B71080452 |
All device variants of the ISOSCAN® EDS551 are available from the factory. The basic variant can be retrofitted with function module A if required. Activation is via licence and is valid indefinitely. Further information on the available versions and order numbers can be found in the ordering information.
Device variants
Basic device:
- Insulation fault location per measurement channel, response value 50 kΩ, not configurable
Function Module A: Extended measured values
- Insulation fault location per measurement channel, response value 50…200 kΩ, configurable
- Measurement of leakage capacitance and impedance
Optional Accessories for ISOSCAN® EDS551
Power supply
| Type | Supply voltage | Output voltage | Art. No. | Description |
|---|---|---|---|---|
| AN410 | AC 90…264 V, 47…63 Hz*/DC 120…370 V* | DC 24 V, 420 mA | B924209 | Supplies up to 6 EDS551 |
ISOMETER®
| Type | Description | Item No. |
|---|---|---|
| isoMED527-L-2 | Insulation monitoring device – basic device | B81625521 |
| Isolation monitoring device with function module A | B81625524 | |
| LIM7-L-2 | Line Isolation Monitor to UL 1022 | B81625520 |
Downloads for ISOSCAN® EDS551
| Name | Category | Size | Language | Timestamp | D-/B-Number |
|---|---|---|---|---|---|
| EDS551 | CE Declarations of conformity | 160.0 KB | 2026/07/0101.07.2026 | ||
| UKCA - EDS551 | Declarations of Conformity | 168.6 KB | 2026/07/0101.07.2026 | ||
| EDS551 | Datasheets | 1.4 MB | DE | 2026/06/0909.06.2026 | D00530 |
| EDS551 | Datasheets | 2.2 MB | EN | 2026/06/0909.06.2026 | D00530 |
| EDS551 | Manuals | 1.9 MB | DE | 2026/07/0808.07.2026 | D00530 |
| EDS551 | Manuals | 1.4 MB | EN | 2026/07/0808.07.2026 | D00530 |
| EDS551 | Quickstarts | 556.5 KB | DE | 2026/05/2727.05.2026 | D00530 |
| EDS551 | Quickstarts | 556.5 KB | EN | 2026/05/2727.05.2026 | D00530 |
