Keithley PIO-SSR-120 Multi-Channel, Parallel, Digital I/O Board
Keithley Digital Input Board. Current: ** 24 mA per line, Current: ** -15 mA per line.
- Model
- Keithley PIO-SSR-120
- Calibration
- Available on request
- Price
- $650
- Status
- In stock
- RFQ ref
- PIO-SSR-120
This unit
The Keithley PIO-SSR-120 is a multi-channel parallel digital I/O board that connects computers with ISA bus slots to external devices for data acquisition and control applications. It has 120 TTL/NMOS/CMOS-compatible digital I/O lines organized across five 50-pin headers, with each header supporting 24 channels. The board can directly drive solid-state relays and, when paired with external SSRs, enables control and sensing of voltages up to 280VAC and 280VDC while delivering 4000Vrms isolation.
Technical Specifications
Digital I/O Lines: 120 channels
Signal Compatibility: TTL/NMOS/CMOS
Sink Current: 24 mA per line
Source Current: -15 mA per line
Output Connections: Five 50-pin headers (24 channels per header)
Isolation (with external SSRs): 4000Vrms
Maximum Voltage (with external SSRs): 280VAC, 280VDC
Power Consumption: +5VDC @ 1.6A typical
Operating Temperature: 0 to 50°C
Storage Temperature: 0 to 70°C
Humidity: 0 to 90% non-condensing
Physical Form Factor: ISA half-slot (5in × 4.25in × 0.75in)
Weight: 4oz
Key Features
Interrupt-capable architecture for event-driven applications
Direct SSR drive capability for high-power switching without intermediate relay logic
Isolation rated to 4000Vrms when used with external solid-state relays
Parallel I/O configuration for high-throughput digital signal management
Low power draw from host ISA bus
Typical Applications
Industrial automation control and monitoring
Laboratory research requiring multi-channel digital I/O
Automated test equipment and ATE systems
High-voltage load switching and sensing
Data acquisition systems requiring isolated digital channels
Compatibility & Integration
Bus Interface: ISA
Operating Systems: MS-DOS, Windows 95/98
Bundled Software: ExceLINX, VisualSCOPE, TestPoint, LabVIEW drivers
Power Rails: +5V, ±12V, -5V available from ISA connector
Specifications
| Parameter | Value |
|---|---|
| Voltage / Current Range | 280VAC/280VDC (with external SSRs) |
Keithley PIO-SSR-120 — Repair & Calibration Service
Aumictech offers NIST-traceable calibration and repair for the Keithley PIO-SSR-120. 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 Keithley PIO-SSR-120 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.
Keithley PIO-SSR-120 price
This Keithley PIO-SSR-120 is listed at $650. Calibration is available separately from $450. Contact us for volume pricing or if you need multiple units.
Keithley PIO-SSR-120 calibration cost
NIST-traceable calibration for the Keithley PIO-SSR-120 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 →
