PLCs, Power Supplies & Others

This module converts digital control signals into precise analog outputs for field actuators. It provides two independent output channels with flexible voltage or current configurations. Engineers use this unit to position control valves, regulate motor speeds, and drive chart recorders. The design incorporates high-resolution conversion for smooth and accurate control responses. Its rugged construction ensures reliable operation in demanding industrial environments.

Channel Architecture and Output Modes

The NC1AY02-MR features two fully isolated analog output channels with independent settings. Each channel can generate either 0-10V voltage signals or 4-20mA current loops. Users configure the output type via software parameters without hardware jumpers. The module supports simultaneous operation with mixed output types across channels. This flexibility accommodates diverse actuator requirements within a single module.

Resolution and Accuracy Specifications

The module achieves 16-bit resolution for precise analog output generation. Output accuracy reaches ±0.1% of full scale at 25°C reference temperature. The digital-to-analog converters maintain linearity within ±0.05% across the entire range. Temperature drift remains below ±50 ppm per degree Celsius. This precision ensures accurate and repeatable actuator positioning for critical process loops.

Physical Dimensions and Rack Mounting

The NC1AY02-MR measures 12.7 cm in width, 25.4 cm in height, and 20.3 cm in depth. It weighs approximately 0.85 kg, which ensures stable placement within the rack assembly. A steel housing with vented panels provides effective thermal management. The unit mounts directly into standard 19-inch racks or compatible PLC backplanes. Its front panel locates all connectors and status indicators for convenient accessibility.

Connector Interfaces and Field Wiring

A 9-pin D-sub connector handles both output channel terminations on the front face. This connector accepts wire gauges from 0.2 mm² to 1.5 mm² for secure connections. Separate terminal blocks provide positive and return connections for each channel. The module includes dedicated shield terminals for grounding cable braids properly. Moreover, strain relief clamps protect terminations from vibration-induced movement and disconnection.

Internal Components and Conversion Architecture

The printed circuit board contains two 16-bit DACs, four operational amplifiers, and six precision resistors. A precision voltage reference provides stable 5.000 V for conversion accuracy. The module also includes 10 surface-mount capacitors for output filtering and noise reduction. A 47 µF tantalum capacitor filters the reference voltage for enhanced stability. No battery or non-volatile memory exists on this purely analog conversion assembly.

Power Requirements and Isolation

The NC1AY02-MR draws 200 mA from the 5 VDC backplane under full operational load. It also requires 150 mA from an external 24 VDC supply for output loop excitation. Channel-to-channel isolation provides 500 VDC separation for preventing ground loops. The module includes transient protection on each output for surge immunity. These features protect the control system from field wiring faults and electrical noise.

Status Indication and Diagnostic Functions

Two front-panel LEDs indicate the operational status of each output channel individually. Green LEDs confirm normal operation while red LEDs signal open-circuit or short-circuit conditions. The module provides a fault relay output for external alarm annunciation. This relay activates when any channel exceeds its configured output range limits. Maintenance personnel can quickly identify actuator faults without complex troubleshooting procedures.

Environmental Specifications and Compliance

The NC1AY02-MR operates reliably across temperatures from 0°C to 60°C. It withstands humidity levels up to 95% non-condensing without performance degradation. The module complies with IEC 61000-4-2 for electrostatic discharge immunity. Vibration tolerance meets IEC 60068-2-6 requirements for industrial environments. This robust construction suits chemical processing, power generation, and HVAC automation applications.

Technical Data Sheet – Fuji NC1AY02-MR

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