Product Details
The Honeywell 900B01-0301, also cataloged as the 900B01 Analog Output Module, operates as a dedicated hardware component for 0 to 20 mA discrete signal driving within Honeywell ControlEdge HC900 Controller platforms.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 900B01-0301 |
| Brand | Honeywell |
| Origin | USA |
| Weight | 0.408 kg (0.90 lbs) |
| Dimensions | 137 mm H x 35.6 mm W (5.4 in H x 1.4 in W) |
| Operating Temp | Standard HC900 rack thermal limits (ambient de-rating applicable above 10 modules per rack) |
| Power Consumption | 40 mA max at 5 VDC; 200 mA max at 24 VDC |
| Outputs Per Module | 4 channels (isolated) |
| Output Current Range | 0 to 21.8 mA (range selectable) |
| D/A Resolution | 12 bits |
| Accuracy | 0.1% full scale at reference conditions |
| Load Resistance | 750 ohms max |
| Galvanic Isolation | 500 VDC channel-to-channel; 600 VDC logic backplane isolation |
| Product Category | PLCs/Machine Control / Analog Output Modules |
4-20 mA HART Loop Protocol & Channel-to-Channel Isolation
The 900B01-0301 module delivers 4 isolated current channels for driving field-side final control elements, providing compatibility with 4-20 mA HART loop protocol actuators and positioners. Featuring 500 VDC channel-to-channel isolation and 600 VDC galvanic isolation from backplane logic circuitry, the hardware mitigates ground loops and transient voltage spikes across distributed control system nodes. Onboard memory stores redundant factory calibration data, while continuous current feedback verification ensures real-time diagnostic reporting to the central processor.
Frequently Asked Questions
Q: What is the maximum load resistance supported per current channel?
A: Each individual analog output channel supports a maximum load resistance of 750 ohms across the full output current span up to 21.8 mA.
Q: How many 900B01-0301 modules can be installed in a single HC900 rack?
A: Up to 10 modules can be installed under standard operational conditions, expandable to 12 modules per rack when ambient temperature de-rating guidelines are applied.
Q: Does the module detect output loop continuity or power faults automatically?
A: Yes, internal diagnostics continuously monitor field calibration integrity, configuration status, and the internal +24 VDC supply while verifying current flow via internal loop feedback.
Field Installation Guidelines
- Power down the HC900 rack assembly prior to inserting or removing the 900B01-0301 module to prevent backplane edge connector damage.
- Ensure field loop wiring uses twisted-shielded cable pairs, grounding the shield braid at a single point on the enclosure chassis ground bar.
- Keep current output field wiring physically separated from high-voltage AC conductors to prevent electromagnetic interference from degrading D/A precision.
- Tighten the top and bottom module retaining screws securely to maintain continuous chassis grounding and backplane alignment.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
Industrial Networking Essentials: Demystifying Hubs, Switches, and Routers in Control Systems
Industrial automation relies heavily on robust networking infrastructure to connect programmable logic controllers (PLCs), distributed control systems (DCS), and human-machine interfaces (HMIs). Modern factory automation environments generate vast amounts of real-time operational data across deterministic networks. Understanding the structural differences between hubs, switches, and routers ensures optimal traffic segmentation, minimizes latency, and maintains high network availability.
Safety Relays in Industrial Automation: Fundamentals, Design Standards, and Fail-Safe Architecture
Safety relays form the bedrock of functional safety in modern factory automation, preventing catastrophic equipment failure and protecting plant personnel. While standard electromechanical relays handle basic load switching, they lack the redundant diagnostics required for high-risk industrial environments. Modern industrial automation platforms—including programmable logic controllers (PLCs) and distributed control systems (DCS)—rely on specialized safety relays to monitor field devices and isolate hazards instantly.
Voice-Activated Industrial Automation: Integrating Speech Control into PLC and DCS Architectures
Industrial automation integrates speech recognition, IIoT protocols, and NLP with PLCs and DCS to streamline operations. By leveraging advanced edge computing, engineers enable real-time, hands-free control—allowing personnel to manage smart factory processes safely away from hazardous equipment.