Keithley PDISO-8 8-Channel Isolated Digital I/O Board
Keithley Digital Input Board. Channels: 5 Form C (SPDT) contacts, Channel: by-channel software filter control for noise rejec.
- Model
- Keithley PDISO-8
- Calibration
- Available on request
- Price
- $225
- Status
- In stock
- RFQ ref
- PDISO-8
This unit
The Keithley PDISO-8 is an 8-channel isolated digital I/O board for control and sensing applications requiring galvanic isolation and ground-loop prevention. It combines 8 electromechanical relay outputs with 8 optically isolated inputs, interfacing through an ISA-bus compatible architecture and 37-pin D-type connector. Designed for industrial automation, process control, and laboratory environments demanding reliable signal integrity.
Technical Specifications Relay Outputs
8 channels: 5 Form C (SPDT) contacts, 3 Form A (SPST) contacts
Contact rating: 3 A @ 125 Vrms (resistive load)
Contact resistance: 100 mΩ max (initial)
Operating time: 20 ms max; Release time: 10 ms max
Mechanical life: 10⁷ operations minimum
Electrical life: 10⁵ operations minimum @ full load
Power-on state: De-energized (relays resting on NC contact) Digital Inputs
8 channels, non-polarized optically isolated
Input range: 5–24 VDC or VAC (50–1,000 Hz)
Input resistance: 470 Ω to 1.6 kΩ
Response time: 5 V minimum; Input low level: <2.5 V maximum
Mixed AC/DC input capability Power & Environmental
+5 V supply: 0.4 A (all relays off), 1.0 A (all relays on)
Operating temperature: 0 to +50 °C
Storage temperature: –20 to +70 °C
Humidity: 0 to 90% non-condensing
Dimensions: 6.0 in × 4.25 in × 1.1 in (152 mm × 108 mm × 28 mm)
Weight: 213 g
Key Features
Functional isolation prevents ground-loop faults and cross-talk
Dry relay contacts rated for both AC and DC switching
Channel-by-channel software filter control for noise rejection
Accepts mixed voltage supplies (AC and DC simultaneously)
Standard ISA-bus interface; backward compatible with legacy systems
Optional screw-terminal connector available (STC-37)
Typical Applications Industrial automation, distributed process control, data acquisition systems with isolated switching, laboratory test benches, equipment monitoring and protection circuits.
Compatibility & Integration ISA-bus compatible PC interface; 32-bit DriverLINX drivers. Bundled with ExceLINX, VisualSCOPE, and LabVIEW support. Requires Windows 95/98/NT environment (Pentium-series processor recommended).
Specifications
| Parameter | Value |
|---|---|
| Frequency Range | 000 Hz (input voltage), 50–1 | Voltage / Current Range: 5–24 VDC or VAC input |
Keithley PDISO-8 — Repair & Calibration Service
Aumictech offers NIST-traceable calibration and repair for the Keithley PDISO-8. 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 PDISO-8 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 PDISO-8 price
This Keithley PDISO-8 is listed at $225. Calibration is available separately from $450. Contact us for volume pricing or if you need multiple units.
Keithley PDISO-8 calibration cost
NIST-traceable calibration for the Keithley PDISO-8 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 →
