Honeywell MC-TAMR04 51305907-175 Analog Input Multiplexer Module – 32-Channel Signal Scanning

This multiplexer module expands analog input capacity for Honeywell control systems. It sequentially scans up to 32 field signals through a single analog-to-digital converter. Engineers use this unit to maximize channel density while minimizing system costs. The design incorporates solid-state switching for fast, reliable channel scanning. Its compact rack-mountable format suits Experion PKS and TDC 3000 installations.

Scanning Architecture and Channel Capacity

The MC-TAMR04 51305907-175 provides 32 single-ended analog input channels arranged in four banks of eight. A solid-state multiplexer sequentially connects each channel to the output converter. The module scans all channels continuously with programmable scan sequences. Users can exclude unused channels from the scan to improve throughput. Consequently, the system achieves efficient and customizable data acquisition.

Switching Specifications and Throughput

Each channel achieves a switching speed of 1 millisecond for reliable signal acquisition. The module completes a full 32-channel scan in under 50 milliseconds. Contact resistance measures less than 50 Ω across each multiplexer channel. Channel-to-channel isolation reaches 60 dB for signal separation. These specifications ensure accurate sampling without cross-channel interference.

Physical Dimensions and Rack Mounting

The MC-TAMR04 51305907-175 measures 12.7 cm in width, 25.4 cm in height, and 20.3 cm in depth. It weighs approximately 1.0 kg, which ensures stable placement within the rack assembly. A steel housing provides mechanical protection and electromagnetic shielding. The unit mounts directly into Honeywell Experion PKS or standard 19-inch racks. Its front panel locates all input terminals and status indicators for convenient accessibility.

Connector Interfaces and Field Wiring

A 40-pin ribbon cable connector handles all input 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 common connections for each input group. The module includes clear labeling for channel identification and wiring guidance. Strain relief clamps protect field wiring from vibration-induced movement and disconnection.

Internal Components and Power Consumption

The printed circuit board contains one multiplexer IC, four bank selector relays, and 32 input resistors. A 47 µF tantalum capacitor filters the reference voltage for the output converter. The module draws 100 mA from the 5 VDC backplane under normal operational load. It also requires 50 mA from the external 24 VDC supply for relay excitation. These minimal power requirements suit energy-conscious system designs.

Signal Integrity and Protection Features

The MC-TAMR04 51305907-175 includes transient suppression on each input for surge immunity. Input protection diodes clamp voltages above ±30 VDC to prevent module damage. The module provides common-mode rejection of 80 dB for noise immunity. Ground loop isolation reduces measurement errors from potential differences. These features ensure accurate signal scanning in electrically noisy industrial environments.

Status Indication and Diagnostic Functions

Two front-panel LEDs indicate module power and scanning status clearly. A green LED confirms proper power while a red LED signals input overrange conditions. The module provides diagnostic data through the output converter interface. This data includes channel status and scanning error information. Maintenance personnel can identify faulty channels without external testing equipment.

Environmental Specifications and Compliance

The MC-TAMR04 51305907-175 operates reliably across temperatures from 0°C to 55°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 refinery automation applications.

Technical Data Sheet – Honeywell MC-TAMR04 51305907-175