Manufacturer: Allen-Bradley
Product No.: 1756-L55M24
Country of origin:United States
Product Type: Guardlogix Safety Cpu Module
Barcode: 8537101190
Payment: T/T, Western Union
Weight: 360g
Dimensions: 14.5 x 3.5 x 12.0 cm
Shipping port: Xiamen
Warranty: 12 months
The 1756-L55M24 is a ControlLogix5555 controller manufactured by Allen-Bradley that provides central processing and control capabilities for industrial automation applications. Designed to mount directly into a ControlLogix chassis, it communicates across the backplane to manage system I/O, execute application logic, and facilitate data exchange.
Equipped with a 1756-M24 nonvolatile memory board, the 1756-L55M24 provides 3.5 MB of data and logic memory. The module features a 9-pin D-shell serial port supporting RS-232 communication for direct connection to programming workstations or external devices using a 1756-CP3 or 1747-CP3 cable. Operating status is indicated by front-panel LEDs for RUN, I/O, FORCE, RS232, BAT, and OK conditions.
| Parameter | Specification |
|---|---|
| Manufacturer | Allen-Bradley |
| Model | 1756-L55M24 |
| Product Family | ControlLogix5555 |
| Data and Logic Memory | 3.5 MB |
| Nonvolatile Memory | Yes |
| Backplane Current (5.1V DC) | 1.25 A |
| Power Dissipation | 5.7 W |
| Thermal Dissipation | 19.4 BTU/hr |
| Operating Temperature | 0 to 60 degC (32 to 140 degF) |
| Storage Temperature | -40 to 85 degC (-40 to 185 degF) |
| Relative Humidity | 5 to 95% noncondensing |
| Operating Shock | 30 g |
| Nonoperating Shock | 50 g |
| Vibration | 2 g @ 10 to 500 Hz |
| Enclosure Type Rating | None, open style |
| Isolation Voltage | 30V (continuous), Basic Insulation Type, RS232 to system |
| Replacement Battery | 1756-BA1 |
| Weight, approx. | 0.36 kg (12.8 oz) |
| Connector Pin | Function |
|---|---|
| Pin 1 | DCD (Data Carrier Detect) |
| Pin 2 | RXD (Receive Data) |
| Pin 3 | TXD (Transmit Data) |
| Pin 4 | DTR (Data Terminal Ready) |
| Pin 5 | GND (Common) |
| Pin 6 | DSR (Data Set Ready) |
| Pin 7 | RTS (Request To Send) |
| Pin 8 | CTS (Clear To Send) |
| Pin 9 | N/C (Not Connected) |
Global Express Shipping
Returns & Warranty
| Product Image | Model Number / Title | Condition | Availability | Action |
|---|---|---|---|---|
|
Allen-Bradley 1756-CNB ControlLogix ControlNet Bridge Communication Module | Original New | In Stock | View Details |
|
Allen-Bradley 1756-OW16I ControlLogix 16-Point Isolated Relay Contact Output Module | Original New | In Stock | View Details |
|
Allen-Bradley 1756-L1M1 ControlLogix 5550 Controller Processor | Original New | In Stock | View Details |
Global Express Shipping
Returns & Warranty
Orders are processed and delivered Monday-Friday (excluding public holidays).
For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .
| Color pattern |
Black
|
| Country of origin |
United States
|
| Power source |
DC Power
|
A practical guide to manual, pilot and solenoid pneumatic valves, covering port functions, monostable and bistable behavior, PLC outputs, safe states, commissioning and fault diagnosis.
A practical guide to current-shunt measurement covering resistor sizing, high-side and low-side placement, Kelvin sensing, error budgets, thermal effects, protection and commissioning tests.
A field-ready guide to Logix produced and consumed tags, covering data contracts, RPI selection, connection status, stale-data handling, commissioning and controller-to-controller troubleshooting.
A practical AS-Interface commissioning method covering topology, power and voltage-drop checks, addressing, PLC mapping, fault tests and maintenance records for reliable actuator-sensor networks.
Learn how line reactors, harmonic filters, output reactors, dV/dt filters, and sine filters address different VFD power-quality and motor-cable problems—and how to select them safely.
Learn how light-on and dark-on photoelectric sensor modes interact with through-beam, retroreflective, and diffuse sensing, PNP/NPN wiring, PLC logic, commissioning, and fault detection.
