AT‑DIO‑32F（National Instruments / NI）

1. Overview

• AT‑DIO‑32F：High‑speed 32‑bit parallel digital I/O interface for ISA bus PC/AT

• 4 × 8‑bit ports（DIOA/DIOB/DIOC/DIOD）；two handshake groups (A+B, C+D)

• TTL‑level, power‑on = inputs

• 50‑pin connector（DRV11J compatible）

2. Key Specifications

Digital I/O

• Channels：32 (4×8 ports)

• Logic：TTL (0–0.8V low；2.0–5.5V high)

• Output drive：48 mA sink (low)；15 mA source (high)

• Power‑on：all inputs

Speed & Transfer

• Programmed I/O：450 kwords/s (16‑bit)

• DMA：330 kwords/s (2 DMA channels)

• Transfer modes：programmed I/O, DMA, interrupts

Onboard Resources

• 3 × 8254 counters/timers (interrupt generation, timing)

• RTSI bus：sync with other NI AT‑series boards

• Handshaking：2‑wire per group (REQ/ACK)

Mechanical & Environmental

• Form factor：ISA full‑length

• Dimensions：340 × 127 mm (13.4 × 5.0 in)

• Operating temp：0–55 °C

• Weight：≈0.25 kg

3. Applications

• Industrial automation：sensor/actuator I/O, machine control

• Production test：ATE, fixture I/O, high‑speed pattern I/O

• Lab research：digital stimulus/response, parallel data acquisition

• Legacy PC‑based control (ISA bus systems)

4. Compatibility

• Bus：ISA (PC/AT, XT, compatible)

• OS：DOS, Windows 3.x/95/98, legacy Linux

• Replacement：NI PCI‑DIO‑32HS or modern USB‑6501/6525

5. Notes

• Not a servo drive (unlike your earlier Kollmorgen/Cooper parts) — it’s a PC digital I/O card.

• Discontinued；available used/refurbished only.