• 3 digital input channels
• 3 relay output channels
• Logic Low: -5V minimum, 0.8V maximum
• Logic High: 3.5V minimum, 24V maximum
• External pull-down resistance: 1KΩ maximum
• External pull-up resistance: 1.5MΩ minimum
• Relay contact form: N.O. & N.C. (Form C
• Relay rating: 5A/240 VAC, 200,000 life cycles (resistive load
• Compatible with PR10, PR20, and PR30 paperless chart recorders

The RD233 is an expandable combination relay output and digital input card for use with PR10, PR20, or PR30 paperless chart recorders. Each card provides 3 digital inputs and 3 relay outputs, supporting a mix of monitoring and control functions in industrial applications.

Expansion Slots

The PR10 and PR20 recorders support up to 4 rear expansion slots, while the PR30 provides up to 16 rear expansion slots for scalable system design.

SPECIFICATIONS

Channels
3 digital inputs, 3 relay outputs

Logic Low
-5V minimum, 0.8V maximum

Logic High
3.5V minimum, 24V maximum

External Pull-down Resistance
1KΩ maximum

External Pull-up Resistance
1.5MΩ minimum

Relay Contact Form
N.O. & N.C. (Form C

Relay Rating
5A/240 VAC, 200,000 life cycles (resistive load