Product Summary
The Allen‑Bradley 1762‑L40BWAR MicroLogix 1200 PLC combines 20 standard 24VDC inputs with 4 fast 24VDC inputs and 16 relay outputs. This controller supports DF1, DH‑485, ASCII, and MODBUS protocols. It operates on 120–240VAC power and dissipates only 22W of heat. Engineers use this unit for micro and small automation tasks requiring reliable, mixed I/O.
Theme A: Product Procurement & Buyer Guide
Procurement engineers must verify the input power supply usage of 82 VA. The module draws 25A inrush for 8ms at 120VAC or 40A for 4ms at 240VAC. The 24VDC sensor supply provides up to 400 mA, but you must never use it to power output circuits. The COM of the sensor supply connects internally to chassis ground. This design prevents ground loops when you sink or source inputs.
The 1762‑L40BWAR carries hazardous location certifications: Class I, Division 2, Groups A, B, C, D (UL 1604, C‑UL under CSA C22.2 no. 213), plus CE/RCM/EAC. These approvals suit installations in potentially explosive environments. The relay outputs handle loads from 24‑125VDC and 120‑240VAC with a contact rating of 10A minimum. Each relay endures 20 million mechanical cycles. Buyers should confirm that the ambient operating temperature stays between 0°C and 55°C. Storage temperature ranges from -40°C to 85°C.
The controller measures 90mm high, 160mm wide, and 87mm deep. It weighs 2.4 pounds. Use the 8‑pin mini‑DIN serial port for primary communication with HMIs or SCADA. The separate programming port allows online edits without disconnecting the main link. This dual‑port design reduces downtime during system updates.
Theme D: Expert Technical Evaluation & Performance Review
The 1762‑L40BWAR provides 20 standard 24VDC inputs (channels 4‑23) and 4 fast 24VDC inputs (channels 0‑3). The fast inputs suit high‑speed counting or interrupt routines. The input circuit accepts both sink and source wiring, giving flexibility for various sensor types. Relay outputs handle AC and DC loads, but engineers must respect the 10A continuous rating per contact.
Heat dissipation of 22 Watts remains low for a 40‑I/O controller. The built‑in power supply delivers 600 mA at 5VDC and 500 mA at 24VDC to internal logic and external devices. The 24VDC sensor power output supplies up to 400 mA, which drives proximity sensors or limit switches. Remember not to parallel this supply with output circuits. The inrush current peaks at 25A (120VAC) or 40A (240VAC), so your upstream breaker must handle these surges.
Communication protocols include DF1, DH‑485, ASCII, and MODBUS. The embedded port uses an 8‑pin mini‑DIN connector. The left‑side programming port uses the same connector type. Both ports function simultaneously, allowing you to monitor the network while editing logic. For reliable operation, mount the controller on a DIN rail (104mm with latch open) and keep ambient temperature below 55°C.
Logistics & Standard Packaging Details
- One Allen‑Bradley 1762‑L40BWAR MicroLogix 1200 PLC unit
- One 8‑pin mini‑DIN communication cable
- Two mounting brackets and DIN‑rail latch
- Printed installation guide (English)
- RoHS compliance certificate
Express shipping is available via FedEx, UPS, and DHL. We package the controller in anti‑static material to protect sensitive electronics during transit.
