Switching relay module IOM441 series

failure protectionDCelectromechanical

Overview
The IOM441-S relay module extends Bender base units (e.g. EDS44x) by providing 12 potential-free relay outputs. Alarm messages from the base device are converted into switching commands for the relays. Communication and power supply between the base device and the module are handled via the Bender backbone bus (BB bus) located at the rear. Firmware updates, parameter transfer and storage of switching states are supported via the BB bus. Note: some base units permit only one IOM441-S to be connected (see respective base unit datasheet).

Key features

• 12 potential-free relay outputs for external signalling or control
• Contact configuration selectable as N/O or N/C
• Optional functions: insulation fault location or residual current function (option "W")
• Communication, supply and firmware update via BB bus

Features (short)

• Extends Bender devices by 12 relays
• N/O and N/C selectable

Applications

• Extension of measuring channels during insulation fault location and provision of external alarm/control contacts

Variants
Type | Supply voltage U_S | Option "W" | Art. No.
IOM441-S | DC 24 V | – | B95012057
IOM441W-S | DC 24 V | x | B95012057W

Optional accessories
Description | Art. No.
Plug kit screw terminals* | B95012901
Plug kit Push-wire terminals | B95012902
Mechanical accessories* (terminal cover + 2 mounting clips) | B95012903
BB BUS 4TE connector* | B98110002
* included in the scope of delivery for corresponding configurations

Technical specifications

• Relay outputs: 12 potential-free contacts
• Contact configuration: configurable as N/O or N/C
• Optional functions: insulation fault location or residual current function (option dependent)
• Communication: Bender backbone bus (BB bus) mounted at the rear
• Supply: module powered via BB bus (DC 24 V)
• Firmware update: via BB bus
• Data retention: parameters and switching states stored in the module
• Compatibility note: some base units allow only one IOM441-S (refer to base unit datasheet)
• Article numbers: IOM441-S (B95012057), IOM441W-S (B95012057W)