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Description
Technical Specifications
Product Model | 900A01-0101Manufacturer | Honeywell (Honeywell Inc.)Product Type | Universal Analog Input Module (8-Channel, Isolated)Compatible System | Honeywell ControlEdge HC900 / 900 Series Hybrid Control SystemNumber of Input Channels | 8 (independently configurable per channel)Supported Input Signals | mV (±10/±50/±100/±500 mV), V (0–5 V, 1–5 V, 0–10 V, ±5 V, ±10 V), mA (0–20 mA, 4–20 mA with 250 Ω shunt), Thermocouple (J/K/T/E/R/S/B/N), RTD (Pt100/Pt200/Pt500/Pt1000, Ni100, Cu10), Slidewire (100–6500 Ω)A/D Resolution | 16 bitsAccuracy | ±0.05 % FS typical; ±0.1 % FS maximum at 25 °CInput Impedance | >1 MΩ for voltage & thermocouple inputs; 250 Ω for current inputsGalvanic Isolation | 400 VDC channel-to-channel (paired for RTDs); 1000 VDC channel-to-backplaneCommon Mode Rejection (CMR) | >90 dB @ 50/60 Hz (typ. >130 dB per spec sheet)Update / Scan Rate | Module-level update ≈ 100 ms; sampled in parallel with CPU cycleBackplane Power Requirement | 24 VDC (supplied by HC900 rack power module), typ. 25–40 mAOperating Temperature | 0 °C to +60 °C (some references –20 °C to +60 °C for extended rating)Dimensions (H×W×D) | Approx. 135 × 53.6 × 105 mm (5.31″ × 2.11″ × 4.13″)Mounting | HC900 I/O rack / chassis (DIN-rail mounted rack assembly)Certifications | UL 508, CSA, CE, FM Class I Div. 2 (where applicable)
Main Features and Advantages
Universal per-channel configurability: The Honeywell 900A01-0101 allows each of its eight channels to be individually assigned any supported signal type—millivolt, voltage, current, thermocouple, or RTD—via software without changing hardware or jumpers. This eliminates the need to stock multiple specialized analog input module types and lets a single card handle mixed instrumentation such as a Pt100 temperature probe on channel 1, a 4–20 mA pressure transmitter on channel 2, and a Type K thermocouple on channel 3, all in the same I/O slot.Full galvanic isolation and noise immunity: With 400 VDC point-to-point isolation (channels grouped for RTDs) and 1000 VDC isolation to the backplane, the Honeywell 900A01-0101 suppresses ground loops and rejects common-mode AC noise exceeding 90 dB. This makes it suitable for installation near VFDs, large motors, and other EMI sources commonly found on plant floors. The high CMRR ensures stable readings even in electrically noisy environments that would cause drift or false trips on non-isolated modules.Precision measurement with built-in linearization: The 16-bit A/D converter and factory-calibrated signal path deliver ±0.05 % FS typical accuracy. For thermocouple inputs the Honeywell 900A01-0101 performs automatic cold-junction compensation and linearization; for RTDs it handles 2-, 3-, and 4-wire configurations with lead-resistance compensation. Sensor burnout detection can be programmed to drive the channel to upscale, downscale, or a user-defined fail-safe value, and the module reports open-circuit conditions to the controller for alarm handling.Hot-swappable operation and diagnostic transparency: When the HC900 rack is powered by a redundant power supply, the Honeywell 900A01-0101 can be removed and replaced live without disturbing other I/O or the controller. Three front-panel LEDs (green = active/scanned, amber = forced, red = fault) combined with module-level diagnostics accessible through the configuration software give maintenance staff immediate visibility into power, communication, and per-channel sensor-fault status, shortening troubleshooting time.Seamless HC900 integration: The Honeywell 900A01-0101 communicates over the HC900 local I/O bus and is recognized automatically by C30, C50, C70, and C75S controllers. Configuration, scaling, alarm limits, filtering, and fail-safe values are set entirely in the Honeywell Process/Hybrid Control Designer, with no separate commissioning tools required.
Application Field
The Honeywell 900A01-0101 is deployed wherever the HC900 hybrid control system is used to monitor continuous process variables from analog field devices. In chemical and specialty chemical plants, the Honeywell 900A01-0101 acquires reactor jacket temperatures via Type J or K thermocouples, column pressure from 4–20 mA transmitters, and feed-flow rates from magnetic flow meters—all on one module—enabling tight closed-loop temperature and ratio control. In water and wastewater treatment facilities, the Honeywell 900A01-0101 reads clarifier-level signals (4–20 mA), dissolved oxygen probe mV outputs, and pH electrode millivolt signals, feeding real-time data to the HC900 PID loops that modulate chemical dosing pumps and aeration blowers.In food & beverage batch processes, the Honeywell 900A01-0101 interfaces with sanitary Pt100 RTDs in pasteurizers and with 4–20 mA signals from fill-level detectors on bottling lines, supporting recipe-driven control and batch-report generation. Power-generation auxiliary systems use the Honeywell 900A01-0101 to digitize bearing-temperature thermocouples and lube-oil-pressure analog transmitters for condition-monitoring alarms tied into the plant’s overall DCS via the HC900’s Modbus/TCP or Profibus DP gateway. By providing universal signal acceptance with high accuracy and electrical isolation, the Honeywell 900A01-0101 reduces panel-space requirements, simplifies spare-parts inventory, and delivers dependable process-data acquisition across these diverse sectors.
