Advantech PCL-722 144-Channel Digital I/O ISA Card
Advantech Digital Input Board. Model: PCL-722.
- Model
- Advantech PCL-722
- Calibration
- Available on request
- Price
- $650
- Status
- In stock
- RFQ ref
- PCL-722
This unit
The Advantech PCL-722 is a 144-channel digital I/O ISA card engineered for industrial automation, process control, and data acquisition systems. This full-size PC add-on card delivers 144 TTL digital I/O lines organized as six 24-line ports, with each port subdivided into three 8-bit subsidiary ports (A, B, and C). The card emulates 8255 Programmable Peripheral Interface mode 0 functionality with buffered output circuits that exceed standard 8255 driving capacity.
Each 8-bit port can be independently configured via software as input or output, and Port C divides into two 4-bit sections for flexible control schemes.
Technical Specifications
- 144 TTL digital I/O lines in six 24-line ports
- Port organization: Port A and B (8-bit each), Port C (split into two 4-bit ports per channel)
- 8255 PPI mode 0 emulation with buffered output circuits
- Hardware interrupt capability on Port C bits 0 and 3; configurable to IRQ 2, 3, 4, 5, 6, or 7 with tri-stated sharing support
- Output status readback for monitoring digital output levels
- Requires 32 consecutive I/O address locations (base address via 6-position DIP switch); optional 16-location addressing reduces usable I/O to 96 bits
- Power consumption: +5 V @ 1.3 A typical, +5 V @ 1.8 A maximum
- Input logic levels: High 2.0–5.25 V, Low 0.0–0.80 V
- Digital output specifications: Port A/B (Logic 0: 0.4 V max @ 12 mA sink; Logic 1: 2.4 V min @ 8.0 mA source); Port C (Logic 0: 0.5 V max @ 24 mA sink; Logic 1: 2.0 V min @ 15 mA source)
- Form factor: Full-length ISA bus card (334 mm × 100 mm)
Key Features
- Software-configurable input/output on each 8-bit port
- Hardware interrupt generation with multi-board sharing capability
- Direct output readback without intermediate sensing circuitry
- DIP switch-based address configuration throughout IBM PC I/O space
Compatibility & Integration Pin assignments are fully compatible with Opto-22 I/O module racks, enabling straightforward integration into existing industrial control systems. The card fits any full-length ISA-bus expansion slot in IBM PC XT/AT or compatible computers. Six 50-pin male ribbon-cable connectors support field-wiring connections.
Advantech PCL-722 — Repair & Calibration Service
Aumictech offers NIST-traceable calibration and repair for the Advantech PCL-722. 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 Advantech PCL-722 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.
Advantech PCL-722 price
This Advantech PCL-722 is listed at $650. Calibration is available separately from $450. Contact us for volume pricing or if you need multiple units.
Advantech PCL-722 calibration cost
NIST-traceable calibration for the Advantech PCL-722 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 →
