National Instruments CFP-RLY-421 User Manuals

Table of Contents

• cFP-RLY-421 Operating Instructions

  1
• Features

  1
• Power Requirement

  1
• Installing the cFP-RLY-421

  2
  • Figure 1. Installing the cFP-RLY-421

    3
• Wiring the cFP-RLY-421

  3
  • Table 1. Terminal Assignments

    4
  • Table 2. VSUP and COM Terminal Assignments

    4
• Connecting Loads to the cFP-RLY-421

  5
  • Figure 2. Connecting a Load

    5
• Protecting Contacts for Inductive Loads

  5
• Guidelines for Selecting Contact Protection Circuits

  6
  • Diode and Zener Diode Circuit

    6
  • Diode Circuit

    7
  • CR Circuits

    7
  • Varistor Circuit

    7
  • In-Rush Current

    8
• Status Indicators

  8
  • Figure 3. Status Indicators

    8
• Upgrading the FieldPoint Firmware

  9
• Isolation and Safety Guidelines

  9
• Specifications

  11
  • Relay Characteristics

    11
  • Physical

    12
  • Power Requirements

    12
  • Isolation Voltage

    12
  • Environmental

    12
  • Shock and Vibration

    12
  • Safety

    13
  • Electromagnetic Compatibility

    13
  • CE Compliance

    13
• Where to Go for Support

  14