1. Relay Output (DO)

Channels: 8 relay outputs

4 SPDT (Form C: NO/COM/NC)

4 SPST (Form A: NO/COM)

Contact capacity (resistive):

Maximum 250 VAC / 30 VDC

Maximum 5 A (250 VAC) / 5 A (30 VDC)

Minimum load: 10 mA @ 5 VDC

Mechanical life: 10,000,000 times

Electrical life: 100,000 times (full load)

Status indication: Each relay has an LED indicator

Readback function: Supports reading the current state of the relay

2. Isolated Digital Input (DI)

Channels: 8 optically isolated inputs (non-polar)

Isolation voltage: 2500 Vrms (optical isolation)

Input level (compatible with 0–24 V):

Low level: 0 ~ 1.5 V

High level: 5 ~ 24 V

Input resistance: 2.2 kΩ / 0.33 W

Filtering: Built-in RC low-pass filter (software selectable)

3. Expansion Capability

Can be equipped with PCI-7251 (Expansion Card)

Maximum expansion: 3 pieces × PCI-7251

Maximum configuration: 32 relay outputs + 32 isolated DI

4. Power Supply and Environment

Power supply: +5 V @ 140 mA (typical)

Operating temperature: 0 ~ 55 °C

Storage temperature: -20 ~ 70 °C

Size: Standard half-length PCI card

5. Typical Applications

Power supply for industrial equipment / motors / valve switch control

Switching of large current loads in distribution cabinets, test systems

Collection of sensor dry contacts, limit switches, button signals

DI monitoring in high-noise environments (variable frequency drives, motor workshops)

Automation test systems (ATE) relay matrix