BENDER ISOSCAN ® EDS460/490-EDS461/491 series



BENDER ISOSCAN ®  EDS460/490-EDS461/491 series

Product Overview

Brand and positioning: ISOSCAN launched by German company BENDER ®  The EDS460/490-EDS461/491 series is an industrial grade equipment that integrates "insulation fault location" and "AC residual current measurement (RCM)". Its core positioning is as an electrical safety monitoring tool for IT systems (ungrounded low-voltage distribution systems). It features "multi-channel, networking, and high sensitivity" and is suitable for AC, DC, and AC/DC hybrid IT systems. It is widely used in industrial plants, ships, power station diode isolated DC systems, and medical places.

Core design objective: Through collaboration with ISOMETER ®  The IRDH575 insulation monitoring instrument or PGH positioning current injector is used in conjunction to quickly locate insulation fault points in the IT system, while monitoring residual current to ensure stable system operation and reduce electrical safety risks.

Product series classification and core differences

This series is divided into three dimensions based on "response sensitivity, display type, and alarm contact configuration", with each model accurately adapting to different scenarios. The core differences are as follows:

Series classification dimensions, specific types, core features, and adaptation scenarios

Response sensitivity EDS460/490 insulation fault location response value 2... 10mA; residual current measurement 100mA... 10A main circuit, industrial general scenario

EDS461/491 insulation fault location response value 0.2... 1mA; residual current measurement 10mA... 1A control circuit, medical field (high sensitivity requirement)

Display type D (EDS46x-D/EDS49x-D) backlit graphic LCD display screen, supporting parameter settings, event queries, and multiple languages (German/English/French) that require local viewing of detailed data and on-site parameter configuration scenarios

L-type (EDS46x-L/EDS49x-L) 2-digit 7-segment digital tube+LED indicator light, only displays device address/error code, needs to be configured through D-type equipment or upper computer without on-site operation, only requires fault alarm indication scenario

Alarm contact configuration 46x series (EDS460/461-D/L) 2 common alarm relays (1 conversion contact per group) only require overall fault alarm, without the need for channel control scenarios

The 49x series (EDS490/491-D/L) includes 2 public alarm relays and 12 independent alarm relays (each with 1 normally open contact) that need to trigger protection actions (such as circuit breaker tripping) in different channels

Core technical parameters

Measurement performance parameters | Parameter categories | EDS460/490 | EDS461/491 |

| Insulation fault location response value | 2... 10mA | 0.2... 1mA | AC residual current measurement range | 100mA... 10A | 10mA... 1A | | Number of channels (single device) | 12 (supporting W/WR/WS series measurement current transformers) | 12 (supporting dedicated high-sensitivity measurement current transformers) | | | Maximum number of networking devices | 90 (total 1080 measurement channels) | 90 (total 1080 measurement channels) | | Full channel scanning time | Approximately 8... 24 seconds | Approximately 14... 30 seconds | | Response delay (t_on)) | 0... 24s (adjustable) | 0... 24s (adjustable) | | Release delay (t_off) | 0... 24s (adjustable) | 0... 24s (adjustable)|

Environmental and Physical Parameters | Parameter Categories | Specific Specifications | 

| Operating Temperature | -25...+55 ℃ | | Climate Class (IEC 60721) | Fixed Use 3K5, Transport 2K3, Long Term Storage 1K4 (No Condensation, No Ice) | | Mechanical Class (IEC 60721) | Fixed Use 3M4, Transport 2M2, Long Term Storage 1M3 | Protection Class (Terminal) | IP20 (DIN EN 60529) | | Shell Material | Polycarbonate (UL94 V-0 Flame Retardant Class) | | Weight | EDS46x Series ≤ 360g | | Installation Method | Screw Installation (2 × M4) or DIN Rail Installation (Compliant with IEC 60715) The sentence is:|

Interface and networking parameters | Interface type | Specific specifications |

| Communication interface | RS-485, supporting BMS protocol | | Baud rate | 9.6kbit/s | | Maximum cable length | 1200m (exceeding DI-1DL repeater required) | | Recommended cable | Twisted pair J-Y (St) Y, minimum 2 × 0.8mm ², shielding layer connected to PE | | Terminal resistance | 120 Ω (0.25W), enabled through DIP switch | Device address range | 1... 90 (BMS bus address)|

Core functions and operational features

Measurement and positioning function

Insulation fault location: By measuring the current transformer to collect the positioning current generated by the PGH injector or IRDH575, when the current exceeds the set response value, the ALARM 2 indicator light is triggered to light up, the D-type equipment displays the fault channel plaintext, and the corresponding channel LED of the L-type equipment lights up.

Residual current measurement: Monitor the AC residual current in the IT system, and when it exceeds 10A (EDS460/490) or 1A (EDS461/491), trigger the ALARM 1 indicator light to turn on.

Channel connection monitoring: Continuously monitor and measure the connection status between the current transformer and the equipment, and trigger the ALARM 1 indicator light to light up when there is a disconnection or short circuit (this function can be disabled).

Storage and alarm function

Historical storage: The D-type device has a built-in historical memory that can store 300 event records, including date, time, channel, event code, measurement value, and supports traceability queries.

Fault memory: "Fault memory activation" (alarm information retained until manual reset or bus reset) or "Fault memory deactivation" (alarm information retained until fault elimination) can be selected.

Alarm relay: supports normally open (N/O) or normally closed (N/C) operation mode selection, and the common alarm relay can be linked to external alarm devices or control systems.

Operation and configuration features

Operation buttons: D-type devices include buttons such as INFO (information query), TEST (self-test), RESET (reset), MENU (menu), etc; L-shaped devices only include basic settings and reset buttons.

Parameter configuration: D-type devices can locally set bus addresses, response delays, fault memory modes, etc; L-type equipment needs to be configured through D-type equipment, IRDH575, MK2430 alarm test combination, or COM460IP protocol converter.

External control: Supports connecting external test/reset buttons (cable length 0... 10m), external buttons of multiple devices cannot be connected to each other.

Core components and accessories

Supporting measurement current transformer: BENDER dedicated measurement current transformer is required, and different models are compatible with different equipment series. The core models are as follows: | Equipment series | Recommended transformer types | Transformer structure | Inner diameter specification (mm) | Model example | Accessory code | | --------------; Rectangle: 70x175, etc; Opening and closing type: 20x30/50x80, etc. | W20 (circular 20mm) | B98080003 | | EDS461/491 | W/WS-8000 series | Circular/opening and closing type | Circular: 20/35/60; Opening and closing: 20x30/50x80 | W20-8000 (round 20mm) | B98080009|

Auxiliary Accessories | Accessory Type | Function Description | Model | Accessory Code |

| RS-485 Repeaters | Extended Bus Distance (over 1200m) or Number of Extended Devices (over 32 units) | DI-1DL | B95012047 | | USB Powered, No Additional Power Supply | DI-2USB | B95012045 | Protocol Converter | BMS Bus to TCP/IP (Ethernet) | COM460IP | B95061010 | | | BMS Bus to Modbus/RTU | FTC470XMB | B95061002 | | BMS Bus to PROFIBUS DP | FTC470XDP | B95061000 | | Power Adapter | Power Supply for Repeaters DI-1/DI-2 | AN471 B924189|

Power supply specifications and ordering information

Power supply voltage options: The device provides two power supply specifications, suitable for different industrial scenarios: | Power supply type | Specification parameters | Corresponding model suffix | 

Typical ordering code example:

EDS460-D-1: EDS460 series, D-type display, low voltage power supply, 2... 10mA sensitivity

EDS491-L-2: EDS491 series, L-shaped display, high voltage power supply, 0.2... 1mA sensitivity, independent alarm contacts per channel

Compliance standards

The equipment complies with multiple international and German industrial standards to ensure measurement accuracy and safety performance:

DIN EN 61557-8（VDE 0413-8）、EN 61557-8、IEC 61557-8

DIN EN 61557-9（VDE 0413-9）、IEC 61557-9

IEC 61326-2-4、DIN EN 60664-1（VDE 0110-1）、DIN EN 60664-3

ASTM F1669M-96 (2007)、ASTM F1207M-96 (2007)