# AutomationDirect BX-DM1-10AR-D

Hardware · `BX-DM1-10AR-D` · verification: source checked

The BX-DM1-10AR-D is a BRX Do-more programmable logic controller CPU with 6 AC discrete inputs and 4 relay outputs. It provides an RS-232/RS-485 serial port, microSD card slot, battery-backed retentive memory, and real-time clock/calendar. It is programmed in ladder with Do-more Designer v2.0 or later and accepts up to eight expansion modules.

## Specification

| Property | Value |
|---|---|
| Category | plc |
| Program memory | 64000 words |
| Data memory | 128000 words |
| Discrete inputs | 6 |
| Discrete outputs | 4 |
| Serial ports | 1 |
| Supply voltage | 12-24 VDC |

## Connected

- Manufacturer: [AutomationDirect](https://machineschema.com/manufacturer/automationdirect.md)
- Protocols: [MODBUS RTU](https://machineschema.com/protocol/modbus-rtu.md)

## Safety

- UL Listed File # E185989.
- CE declaration and RoHS status are stated; EU REACH document is referenced.
- Contains an installed lithium button battery: UN3091, packaging instruction 970, replacement battery D0-MC-BAT, generic battery CR2032.

## Study notes

- Total memory is stated as 192k words: 64k words ladder program memory plus 128k words user data memory.
- The serial port is one RS-232/RS-485 3-pin terminal, rated up to 115.2k baud.
- Serial port protocols include Do-more protocol, Modbus RTU master/slave, ASCII in/out, K-sequence slave, and a non-secure HTTP webserver.
- Discrete inputs are 6 points at 120-240 VAC nominal, arranged in 2 isolated commons of 3 points each.
- Discrete outputs are 4 Form A (SPST) relay points rated 2 A per point, with 12-48 VDC / 24-240 VAC nominal output voltage and 2 isolated commons of 2 points each.
- Supports up to 8 expansion modules and up to 100+ PID loops configurable to memory limit.
- Includes a BX-RTB03S terminal block and D0-MC-BAT battery; requires a BX-RTB10, BX-RTB10-1, or BX-RTB10-2 terminal block kit or ZIPLink pre-wired cables.
- Programming software required is Do-more Designer v2.0 or later; programming language is ladder.
- The item listing states shipping weight as 0.55 lb; this is not stated as net product weight.

## Sources

1. [BRX Do-more PLC: 6-pt in, 4-pt out, serial port, (programmable logic controller) (PN# BX-DM1-10AR-D) | AutomationDirect](https://www.automationdirect.com/adc/shopping/catalog/programmable_controllers/brx_plcs_(stackable_micro_brick)/plcs_-a-_cpus/bx-dm1-10ar-d) (accessed 2026-10-26)
2. [BX DM1 10AR D cutsheet](https://cdn.automationdirect.com/static/specs/cutsheet/BX-DM1-10AR-D_cutsheet.pdf) (accessed 2026-10-26)

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