05704-A-0145 | Honeywell Four Channel Control Card 4 – 20mA Input

The Honeywell Four Channel Control Card 4 – 20mA Input (Part Number: 05704-A-0145) provides essential control, display, and alarm features for up to four connected gas detectors. Below is a detailed breakdown of its capabilities:

General Description:

• Control and Display: This card supports up to four gas detectors. The front panel features a backlit display that shows the gas readings, channel status, and channel numbers.
• Alarms: LEDs signal alarms, and a push-button allows users to reset alarms and select the card for integration with the Engineering Card.
• Microprocessor Control: A microprocessor controls the card’s operations. It allows configuration for various gas detectors and applications, with the software setup stored in EEPROM.
• Control Card Types: Depending on the type of gas detector, you can choose between two versions of the card:
  • Four Channel Control Card Catalytic Input (Part Number: 05704-A-0144)
  • Four Channel Control Card 4 – 20mA Input (Part Number: 05704-A-0145)
• Analogue Output Modules: These optional modules provide a remote output of the channel card readings. Each channel requires one module, and users can select either a current sink or current source configuration.

Control Functions:

The Four Channel Control Card performs essential functions for managing gas detection systems:

1. Power Supply: It supplies the necessary voltages and currents to drive the connected sensors.
2. Signal Processing: The card processes the signals from the sensors.
3. Signal Display: It displays the signal levels on a front panel LCD.
4. Alarm Comparison: It compares each channel’s signal with predefined alarm limits.
5. Alarm Activation: When the signal exceeds the alarm limits, the card triggers the alarms by lighting the LEDs and operating connected relays.
6. Communication: It shares alarm status information with other cards in the system.
7. Self-Validation: The card ensures the proper operation of its components, software, and sensor conditions.

Analogue Output Module:

• Optional Modules: These modules provide a current loop output that mirrors the sensor’s signal. The output can be set to either 0 – 20mA or 4 – 20mA, which makes it ideal for driving chart recorders, data loggers, or PLC systems.
• Module Types:
  • Current Sink: Part Number: 04200-A-0145
  • Current Source: Part Number: 04200-A-0146

Key Features:

• Control and Alarm Management for up to four gas detection channels
• Backlit Display for clear visibility of status and readings
• Microprocessor-Controlled operation for adaptability to various gas detection needs
• Analogue Output Modules for remote data monitoring
• Self-Validation for continuous reliability and performance

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