Agilent/HP 44474A Rev B 16-Bit Digital I/O Module Card Board 44474-66501
The Agilent/HP 44474A is a 16-bit digital I/O module designed for data acquisition and control applications. This module provides a reliable interface for connecting digital devices to a computer system. It features solid construction and is ideal for industrial and laboratory environments requiring precise digital signal handling.
- Model
- Agilent / HP 44474A / 44474-66501
- Calibration
- Available on request
- Price
- $125
- Status
- In stock
- RFQ ref
- 44474A / 44474-66501
This unit
The Agilent/HP 44474A Rev B is a 16-bit digital I/O module card for the 3499A/B/C mainframe family, delivering flexible data acquisition and control in industrial and laboratory environments. It has 16 bi-directional data lines plus 4 control/handshaking lines with independent addressing by individual bits, 8-bit ports, or 16-bit word. Each I/O line sinks up to 0.125 A from external devices, making it suitable for direct interfacing with industrial logic and sensor networks.
Technical Specifications
- Digital I/O Lines: 16 bi-directional with individual, 8-bit port, or 16-bit word addressing
- Control/Handshaking Lines: 4 dedicated lines
- Input Levels (TTL): Vin (high) > 2.0 V; Vin (low) 2.4 V @ I < 8 mA; Vout (low) < 0.4 V @ I 2.4 V @ I < 400 µA; Vout (low) < 0.5 V @ I < 2 mA
- Current Sink Capability: Up to 0.125 A from external devices at Vout < 1.25 V
- Maximum Line Voltage (Digital I/O): +30 V DC
- Maximum Line Voltage (Handshake): +5 V DC
- Connector: Screw terminals included; optional HP 44484A terminal block
Key Features
- TTL-compatible input and open-collector output architecture
- Flexible addressing - select individual bits, dual 8-bit ports in mixed I/O mode, or single 16-bit word
- High current sink capability enables direct control of relays, solenoids, and indicator lamps
- Independent port configuration supports simultaneous input and output operations
- Accommodates ±30 V transients on digital lines for industrial noise immunity
Typical Applications
- Automated test equipment (ATE) with distributed I/O control
- Sensor and switch interfacing in data acquisition systems
- Relay and solenoid driving in laboratory automation
- Mixed-signal control systems requiring independent input/output channels
Compatibility & Integration Installs directly into Agilent/HP 3499A, 3499B, and 3499C mainframes. User's Manual, Service Manual, and Quick Reference Guide for the 3499A/B/C platform available.
Specifications
| Parameter | Value |
|---|---|
| Voltage / Current Range | '+30 V DC (digital I/O lines), +5 V DC (handshake lines), 0.125 A sink capability |
Agilent / HP 44474A / 44474-66501 — Repair & Calibration Service
Aumictech offers NIST-traceable calibration and repair for the Agilent / HP 44474A / 44474-66501. Calibration covers per-channel threshold accuracy, input leakage current, logic level high/low margins, and signal timing verification. All calibrations ship with a NIST-traceable certificate. Turnaround is typically 1–3 business days after receipt.
Common Agilent / HP 44474A / 44474-66501 faults: ESD-damaged input protection, failed driver ICs, connector pin damage. Most failures involve ESD-damaged input protection circuitry, failed logic driver ICs, or mechanical connector pin damage. Board-level component replacement is standard practice.
Agilent / HP 44474A / 44474-66501 price
This Agilent / HP 44474A / 44474-66501 is listed at $125. Calibration is available separately from $450. Contact us for volume pricing or if you need multiple units.
Agilent / HP 44474A / 44474-66501 calibration cost
NIST-traceable calibration for the Agilent / HP 44474A / 44474-66501 is $450 (standard — pass/fail certificate and calibration sticker) or $650 (full measured data at every test point, reference standards documented, traceability chain included). Calibration for this instrument covers per-channel threshold accuracy, input leakage current, logic level high/low margins, and signal timing verification. Turnaround is 1 to 3 business days after receipt. See full calibration details →
