HONEYWELL | 05704-A-0146 | Function card-Shanxi Runsheng

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HONEYWELL | 05704-A-0146 | Function card

System 57 operates on a rated 24V (18V to 32V) DC power supply and can obtain supply inputs from various sources, including mains AC power, through a separate AC to DC power supply device, local factory DC power supply, and/or battery backup DC power supply. The power supply is provided to the system through a DC input card 57

It provides a terminal block that allows for flexible power connections and diode separation for two independent power inputs. The required rated power depends on the type and quantity of sensors, channels, and configuration of system 57. The following power budget calculation table allows for quick and simple calculation of the worst-case power requirements of the system. In many cases, however, a more detailed power budget should be analyzed to confirm the exact requirements. The 8-way AC to DC power supply unit can provide either 50W DC power or 100W DC power, depending on whether it is in single switch mode or dual switch mode, and the module is included in the power supply unit. Similarly, 16 AC to DC power units can provide 50W, 100W, 150W, and 200W DC power, depending on whether one, two, three, or four switch mode module power units are included.

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Digital Output Module

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Description

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　　05704-A-0146 Other names:

　　Input/output module 05704-A-0146

　　05704-A-0146 Control Module

　　Analog module 05704-A-0146

　　The 5701 Single Channel Control Card provides control, display and alarm facilities for a connected gas detector. The front panel display indicates the gas reading and channel status while LEDs are used for alarms. A push-button is provided for resetting the alarms and selecting the card for use with the Engineering Card.

　　The operation of the control card is microprocessor controlled and is fully definable for a wide range of connected gas detectors and application requirements. The software configuration setup is stored in an EEPROM.

　　There are two types of control card depending on the type of gas detector being fitted to the system:

　　a. Single Channel Control Card 4 - 20mA. Part Number 05701-A-0301.

　　b. Single Channel Control Card Catalytic. Part Number 05701-A-0302.

　　Each of the above control cards consist of a single channel control card fitted with the respective plug-in sensor drive module.

　　An optional Analogue Output Module can also be plugged into the single channel control card to provide a remote output of the channel card readings.

　　Single Channel Control Card

　　The Single Channel Control Card carries out the control functions for a single loop of gas detection as follows:

　　a. Processes the incoming sensor drive module signal.

　　b. Displays the signal level on the front panel liquid crystal display.

　　c. Compares the signal level with pre-defined alarm limits.

　　d. When the pre-defined alarm limits are exceeded, raises the alarms by lighting up front panel LEDs and operating optional connected relays.

　　e. Informs other cards with the alarm status information.

　　f. Self validates the operation of its circuit components, software operation and the condition of the sensor

　　Sensor Drive Modules

　　Two sensor drive modules are provided:

　　a. Sensor Drive Module, 4 - 20mA, Part Number 05701-A-0283

　　b. Sensor Drive Module Catalytic, Part Number 05701-A-0284

　　The Sensor Drive Module conditions the incoming catalytic or 4 - 20mA sensor signal and provides the necessary sensor power supply. It contains all the circuitry necessary to generate the voltages and currents required to drive the sensor, the circuitry to acquire the sensor signal and to scale the sensor signal to a standard output. The sensor drive modules are factory fitted and plug directly onto the channel control card.

　　Analogue Output Module

　　An optional Analogue Output Module, (Part Number 05701-A-0285), may be factory fitted to the Single Channel Control Card and is used on a channel of gas detection to provide an isolated current loop output which follows the sensor signal level. This may be set electronically to produce a 0 - 20mA output or a 4 - 20mA output and can be used to operate a chart recorder, etc.

　　Single Channel Control Card Physical Layout

　　The physical layout of the Single Channel Control Card is shown below. The Sensor Drive Modules plug into the 14-way connectors J1 and J2 while the Analogue Output Module, when fitted, plugs into J3 and J4. Link LK1, available on MkII cards only, is used when individually powering control cards See Chapter 4, Section 16.2.

　　SYSTEM DESCRIPTION

　　Provides connections between the sensor and the control card in the same way as the Field Interface Card. This card is used to provide master alarm functions or a mixture of master and individual alarms. The card is fitted with eight relays, seven of which are fully configurable while the eighth is used for fault alarm. The relay states are monitored by the control card to ensure correct operation of the relays. In the case of a malfunction, the fault relay of the high integrity relay card de-energises. The fault relay shall always be monitored in order to ensure correct operation of the system.

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