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AutomationDirect BX-DM1-18ED1

The BX-DM1-18ED1 is a BRX Do-more stackable micro brick programmable logic controller from AutomationDirect. It runs ladder logic programmed with Do-more Designer and provides 10 discrete inputs plus 8 sinking discrete outputs on the base unit, with a single RS-232/RS-485 serial port for programming, Modbus RTU and ASCII communication. It accepts up to 8 expansion modules, includes a real-time clock, retentive memory, battery backup and a microSD card slot, and is powered from 120-240 VAC.

Source checked10/10 values · 2026-10-26AutomationDirectPLC
Weight
0.408kg

Specification

2 sources
Categoryplc
Program memory64,000 words
Data memory128,000 words
Discrete inputs10
Discrete outputs8
Serial ports1
Supply voltage120-240 VAC
Switching frequency250,000 Hz

Quick answers

How much does the AutomationDirect BX-DM1-18ED1 weigh?
0.408 kg, per BRX Do-more PLC: 10-pt in, 8-pt out, serial port, (programmable logic controller) (PN# BX-DM1-18ED1) | AutomationDirect (automationdirect.com).

Study notes

  • Memory totals 192k words: 64k words ladder program memory plus 128k words user data memory.
  • Programming language is ladder, using Do-more Designer programming software v2.0 or later.
  • Communication port is (1) RS-232/RS-485 on a 3-pin terminal, up to 115.2k baud; supported protocols are Do-more protocol, Modbus RTU master/slave, ASCII in/out, K-sequence slave and a non-secure HTTP webserver.
  • 10 discrete inputs rated 12-24 VAC/VDC, sinking/sourcing, split across 2 isolated commons of 5 points each; frequency response 250 kHz.
  • 8 sinking discrete outputs rated 12-24 VDC at 0.5 A/point, split across 2 isolated commons of 4 points each.
  • All 10 inputs are high-speed capable and 4 outputs are high-speed capable; up to 3 up/down, pulse/direction or quadrature counters and up to 3 interval, duration or frequency measurement functions.
  • Output pulse modes support up to 4 virtual axes, 3 PTO linear step/direction outputs, 2 PTO CW/CCW outputs, 2 PTO quadrature outputs and 3 PWM outputs.
  • Axis profiles include relative/absolute positioning, velocity mode, trapezoid, S-curve, electronic gearing, camming, following, homing, jogging and linear interpolation.
  • Up to 100+ PID loops, configurable to the memory limit; up to 4 input interrupts, 4 timer interrupts and 4 match register interrupts, plus up to 4 programmable limit switches and 4 preset tables.
  • Two isolated input commons and two isolated output commons are provided; maximum of 8 expansion modules may be added.
  • Includes BX-RTB03S terminal block and D0-MC-BAT battery; requires BX-RTB18 or BX-RTB18-1 terminal block kit or ZIPLink pre-wired connection cables.
  • Supports real-time clock/calendar, retentive memory, battery backup and a MicroSD card slot.

Safety

  • Agency approvals: UL Listed File # E185989; no UL Recognized file, no UL Hazardous file and no CSA file; RoHS status Yes (see CE document), with CE declarations and EU REACH document available.
  • Ships with a button-cell lithium battery installed: UN3091, hazard type lithium batteries, lithium content 0.07, packaging instruction 970; replacement battery D0-MC-BAT (generic CR2032).
  • External power requirement is 120-240 VAC.
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