OMRON B7AM-8B16 I/O Terminal Block

The OMRON B7AM-8B16 is a compact, connector‑type I/O terminal block designed for use with OMRON PLC systems and other industrial controllers. This module serves as a convenient interface between the PLC’s I/O cables and field devices, allowing for organized, easily serviceable wiring. It provides 16 connection points per block, with each point featuring both a wire connection and an LED status indicator for immediate visual feedback of the signal state.

The terminal block is designed for DIN‑rail mounting and uses screw‑less spring‑clamp technology for fast and secure wire termination (solid or stranded conductors up to 1.5 mm²). It includes a built‑in cable clamp for strain relief, protecting the connections from mechanical stress. The B7AM‑8B16 is often used in combination with OMRON’s CJ, CS, or CP series PLCs, providing a neat, modular wiring solution for digital and analog signals.

Technical Specifications

• Number of connection points: 16 (8 inputs + 8 outputs, or general purpose)

• Connection type: Spring‑clamp (push‑in) for solid or stranded wire, 0.2‑1.5 mm²

• Current rating: 10 A per point (shared common)

• Voltage rating: 250 V AC / 24 V DC

• LED indication: Yellow/green per point (illuminates when signal is active)

• Strain relief: Integrated cable clamp for I/O cable

• Mounting: DIN‑rail (35 mm), with fixing clamps

• Dimensions: 130 x 45 x 68 mm (L x W x H)

• Operating temperature: -10°C to +55°C

• Certifications: CE, RoHS

Key Functional Features

• LED status monitoring: Each channel has a high‑visibility LED that lights up when the signal is ON, greatly simplifying troubleshooting and commissioning.

• Color‑coded wire entry: The spring‑clamp terminals are clearly numbered, reducing wiring errors.

• Compact modular design: Multiple blocks can be placed side‑by‑side for dense I/O applications.

• Integrated test points: Small holes on each terminal allow easy measurement with a multimeter without removing wires.

Typical Applications

• PLC input/output wiring: Connecting sensors, pushbuttons, and actuator signals to the PLC cable harness.

• Signal distribution panels: Organizing field signals in a central terminal block for easier maintenance.

• Machine control cabinets: Providing a neat, professional wiring interface between PLC and machine components.

• Retrofit projects: Replacing older terminal blocks with modern, LED‑equipped units for improved diagnostics.

Installation and Wiring

Snap the B7AM‑8B16 onto a DIN rail and secure it using the provided locking clips. Prepare the wires by stripping 8‑10 mm of insulation. Insert the wire into the spring‑clamp hole and press down on the release button with a small screwdriver to open the clamp, then release to secure the wire. For the I/O cable, use the integrated clamp to fix the cable jacket, providing strain relief. Connect the common terminal (COM) to the supply voltage (0V or 24V) depending on the PLC’s input/output configuration. Verify the LED indicators to confirm correct wiring.

Compliance

This terminal block is CE marked and RoHS compliant. It meets the requirements of EN 61131‑2 for industrial equipment.

Conclusion

The OMRON B7AM‑8B16 I/O terminal block offers a practical, space‑saving, and highly visual solution for organizing field wiring in PLC‑based systems. Its LED indicators, spring‑clamp technology, and robust design enhance both installation efficiency and ongoing maintenance.