Overview

The 24 Volt DC Positive/Negative Logic Input Module for the Series 90-30 Programmable Logic Controller provides 32 discrete input points. The inputs are organized into four isolated groups of eight:

• Group A: A1 - A8
• Group B: B1 - B8
• Group C: C1 - C8
• Group D: D1 - D8

Each group has its own common connection and supports both positive and negative logic inputs, operating at levels up to 30V.

Specifications

• Rated Voltage: 24 volts DC, Positive or Negative Logic
• Input Voltage Range: 0 to 30 volts DC
• Inputs per Module: 32 (four groups of eight inputs each)
• Isolation:
  • 1500 volts between field side and logic side
  • 250 volts between groups
• Input Current:
  • 7.0 mA (typical ON current @ 24 VDC)

Input Characteristics

• On-state Voltage: 11.5 to 30 volts DC
• Off-state Voltage: 0 to 5 volts DC
• On-state Current: 3.2 mA (minimum)
• Off-state Current: 1.1 mA (maximum)
• On Response Time: 2 ms maximum
• Off Response Time: 2 ms maximum

Internal Power Consumption

• 195 mA (maximum) from +5V bus on backplane:
  • (29 mA + 0.5 mA/point ON + 4.7 mA/LED ON)
• 224 mA (typical) from isolated +24V bus on backplane or from user input supply @ 24 VDC (all 32 inputs ON)