| Technical Specification | |
| Name | Zone expansion module |
| Zone expansion | 1/2 zones |
| Alarm out | 1 relay out |
| Communication protocol | MBus |
| Communication distance | 2.4km |
| Baud rate | 9600bps |
| Address | Addressable code |
| Dimensions(W×D×H) | 60mm×25mm×13mm |
| Working temperature | -10°C~55°C |
ARM911/921
Single/Dual-Zone Input & Single Relay Output Module
>ARM911: single-zone expansion, NC/NO option
>ARM921: dual-zone expansion, NC/NO option
>1 relay out
>MBus protocol
>Applied in ARC9016C series
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>ARM921: dual-zone expansion, NC/NO option
>1 relay out
>MBus protocol
>Applied in ARC9016C series
