{"id":"automationdirect-bx-dm1-18ed1","model_id":"BX-DM1-18ED1","name":"AutomationDirect BX-DM1-18ED1","summary":"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.","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_notes":["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."],"sources":[{"url":"https://www.automationdirect.com/adc/shopping/catalog/programmable_controllers/brx_plcs_(stackable_micro_brick)/plcs_-a-_cpus/bx-dm1-18ed1","title":"BRX Do-more PLC: 10-pt in, 8-pt out, serial port, (programmable logic controller) (PN# BX-DM1-18ED1) | AutomationDirect","accessed":"2026-10-26"},{"url":"https://cdn.automationdirect.com/static/specs/cutsheet/BX-DM1-18ED1_cutsheet.pdf","title":"BX DM1 18ED1 cutsheet","accessed":"2026-10-26"}],"verification":{"status":"source_checked","checked_at":"2026-10-26","values":10,"method":"llm_source_check"},"updated_at":"2026-10-26","type":"hardware","spec":{"category":"plc","manufacturer":"automationdirect","controllers":[],"weight_kg":0.408,"program_memory_words":64000,"data_memory_words":128000,"discrete_inputs":10,"discrete_outputs":8,"serial_ports":1,"supply_voltage":"120-240 VAC","switching_frequency_hz":250000,"joints":[],"protocols":["modbus-rtu"],"standards":[],"error_codes":[]},"url":"https://machineschema.com/hardware/automationdirect-bx-dm1-18ed1","license":"https://creativecommons.org/licenses/by/4.0/"}