Honeywell MC-PAIH03 16 Input Analog Input Processor C300 Series

• Manufacturer: Honeywell
• Product No.: 51304754-150
• Product type: ??-PAIH03 High Level Analog Input Processor-16 Inputs
• FTA Models: MU-TAIH02, TAIH12, TAIH52, TAIH03, TAIH13, TAIH23, TAIH53, TAIH22, TAIH62
• Input Type: Voltage, current (2-wire or self-powered transmitters)
• Input Channels: 16 differential input channels
• Common Mode Rejection Ratio, dc to 60 Hz (500 source imbalance): 70 dB
• Common Mode Voltage, dc to 60 Hz(1): -6 to +5 V peak
• A/D Converter Resolution: 16 bits (14 bits used)
• Input Range: 0 to 5 V, 1 to 5 V, 0.4 to 2 V, 4-20 mA (through 250 )
• Normal Mode Rejection Ratio, at 60 Hz: 32 dB
• Normal Mode Filter Response: Single-pole RC, -3 dB @ 1 Hz
• Maximum Normal Mode Input(differential inputs, no damage): ± 30 Volts
• Crosstalk, dc to 60 Hz(channel-to-channel): 60 dB
• Input Impedance (Voltage Inputs): > 10 M powered
• Maximum Input Voltage(any input referenced to common, no damage): ± 30 Volts
• Input Scan Rate: 4 samples per second per channel. All channels sampled within a 250 ms window
• Hardware Accuracy (@ CMV = 0 V): ± 0.075% full-scale (23.5°± 2°C), ± 0.15% full-scale (0 to 50°C)
• Surge withstand capability (Common mode): ANSI/IEEE C37.90.1-1978
• Shipping Weight: 3 Kg

They perform engineering unit conversion, including fifth-order polynomial temperature input characterization, if the high level processor receives these inputs from mV/I converters. Through use of a dual processor design and custom integrated circuits, the low level analog input processor supports software configuration per channel for different thermocouples or RTD types with excellent resolution and accuracy. Open thermocouple detection is performed once per scan so that no bad data is propagated for control processing.

The Low Level Multiplexer (LLMUX) processor provides an economical way to bring in a large number of data acquisition signals. Each processor can handle 32 points, using two 16-point FTAs. Every point is scanned once per second with a one second scan delay for processing. Open thermocouple detection is performed every 30 seconds for all points.

Options for either local or remote cold junction reference are available. The Remote Hardened Multiplexer (RHMUX) processor provides functionality similar to that of the LLMUX, but the two 16-input FTAs may be mounted up to 2 km away from the xPM cabinet. Each FTA is mounted in its own NEMA-4 or -4X enclosure, providing protection against precipitation, hosedown, and windblown dust. The FTA itself is conformally coated, and is capable of operation in a GX "Severe" corrosive environment and in the presence of condensing humidity.

Power for the RHMUX's remote FTAs is provided by one of two power adapters, which provide power limiting, serial data interfaces, and galvanic isolation. The power adapter mounts in the FTA tray in the xPM cabinet, and provides the interface between the IOP and the two remote FTAs. The Intrinsically Safe Power Adapter (ISPA) allows the FTAs to be placed in Division 1 or Zone 0 environments.

Every point is scanned once per 4 seconds. Data is made available at the end of each scan; there is no additional processing latency. Open-thermocouple detection (OTD) is optionally performed on every measurement. If enabled, the OTD test is performed immediately after the A/D conversion. If the test indicates an open thermocouple, data from the just-completed conversion will not be propagated. To prevent spurious ground paths from affecting readings, ground-fault detection is performed. All RHMUX remote FTAs are equipped with a local cold junction reference The RHMUX IOP is configured into the TPS PM system as a standard LLMUX. This permits using the RHMUX in Release 300 and greater systems.