# AutomationDirect BX-DM1-10ER-D

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

The BX-DM1-10ER-D is a BRX Do-more programmable logic controller that runs on an external 12-24 VDC supply. It has six AC/DC discrete inputs and four relay discrete outputs on the base unit, plus one RS-232/RS-485 serial port for programming and communications. It is programmed in ladder with Do-more Designer software version 2.0 or later and accepts up to eight expansion modules.

## Specification

| Property | Value |
|---|---|
| Category | plc |
| Weight | 0.2495 kg |
| 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; UL Recognized file number and UL Hazardous file number are listed as none. RoHS status: yes.
- Ships with a button-cell lithium battery installed: UN3091, packaging instruction 970, lithium content 0.07; replacement battery D0-MC-BAT, generic battery CR2032.

## Study notes

- Memory is stated as 192k words total: 64k words ladder memory plus 128k words user data memory.
- Base unit supports up to 8 expansion modules.
- Programming language is ladder; programming software is Do-more Designer v2.0 or later.
- Communication port is one RS-232/RS-485 on a 3-pin terminal, with port speeds up to 115.2k baud.
- Port protocols other than Modbus RTU Master/Slave are Do-more protocol, ASCII in/out, K-sequence slave and a non-secure HTTP webserver.
- Discrete inputs: 6 points, 12-24 VAC/VDC, sinking/sourcing, 2 isolated commons with 3 points each, 250 kHz frequency response; all 6 points are high-speed capable.
- Discrete outputs: 4 points, relay Form A (SPST), 12-48 VDC/24-240 VAC, 2 A per point, 2 isolated commons with 2 points each.
- High-speed counters, position scaling, interval/duration/frequency measurement and interrupts are available up to 3 or 4 functions depending on the function.
- Up to 100+ PID loops, configurable to the memory limit.
- Includes real-time clock/calendar, retentive memory, battery backup and a MicroSD card slot.
- Includes BX-RTB03S terminal block and D0-MC-BAT battery; requires BX-RTB10, BX-RTB10-1 or BX-RTB10-2 terminal block kit or ZIPLink pre-wired cables.
- Item shipping weight is stated as 0.55 lb; country of origin USA, HS code 8537.10.

## Sources

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

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