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Feature table for KRM-X® duct smoke detector

Features / Functions KRM-X® KRM- KRM-X-1- KRM- KRM-X-2- KRM-X- KRM-X-1-DZ- KRM-X- KRM-X-2-DZ-
X-1 MOD X-2 MOD 1-DZ MOD 2-DZ MOD
KRM-X-1- KRM-X-2- KRM-X-1-DZ- KRM-X-2-DZ-
BAC BAC BAC BAC
Power supply 230 V AC X X X X
Power supply 24 V AC / DC X X X X
DIBt approval for the control of fire / smoke flaps X X X X
VdS approval for automatic fire alarm systems X X X X X X X X
(monitoring ventilation, fans, etc.)
Reset smoke alarm via voltage disconnection X X X X
Flow monitoring by floating break contact (no X X X X
current = open)
Failure reporting through floating break contact X X X X
RS485 interface (Modbus RTU or BACnet)
for connection to automation stations (visualization X X X X
of contamination, status, temperature, flow)
Connection possibility for AZE external display Modbus Modbus Modbus version Modbus version
unit 1.2 via RS 485 (Modbus RTU) to indicate version only version only only only
contamination status, temperature, flow X X X X

LED Smoke alarm (red) LED Smoke alarm (red)

LED Failure (yellow) Display indicator
(contamination in
% or status)

LED Alarm (red) and
Alarm / reset button LED Power supply
(green)

Failure reset: Briefly press
button and release LED Air flow (blue)
lights up when there is
insufficient flow
Alarm reset: Press button
for at least 2 seconds
until the red LED goes out

AZE 1.2 for KRM-X-2-MOD / KRM-(X-)2-DZ-MOD
KRM-X-1-MOD / KRM-(X-)1-DZ-MOD

132 | Catalog 2025 | Fire protection To our online catalog: www.oprg.de/en/support/download-center