05704-A-0145 Honeywell System 57 Four Channel 4-20mA Loop Input Gas Control Card

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General Information

Model number	05704-A-0145
Country of origin	USA
Condition	Brand New
Dimension	2.5x17x12.8cm
Weight	0.16kg
Lead time Warranty	in stock
MOQ	1 pcs

Comprehensive Feature

The 05704-A-0145 is a Honeywell System 57 microprocessor-based Four Channel Control Card featuring dedicated 4-20mA loop input processing. Fully compatible with the System 57 backplane, this unit works seamlessly with industrial gas detectors to deliver flexible threshold programming, localized backlit LCD readout tracking, and stable industrial safety network communication.

Specific Application

Continuous Loop Gas Asset Tracking: Directing, scaling, and verifying up to four independent 4-20mA analog industrial gas transmitter signals inside one thin-profile control slot.
Localized Level and Hazard Display: Real-time evaluation of incoming sensor currents against pre-defined alarm thresholds to display active gas values on the integrated backlit LCD screen.
Central Panel Space Management: Consolidating complex multi-channel analog signal processing into a 1-inch wide footprint for space-constrained industrial control cabinets.

Ordering Information

Part Number	Item Description	Slot Width Allocation	Main Function / Application
05704-A-0145	4-Channel Gas Control Card (4-20mA Input)	1 Slot	Receives and evaluates standard 4-20mA process loop signals from 4 gas transmitters.
05704-A-0144	4-Channel Gas Control Card (Catalytic Input)	1 Slot	Provides constant bridge drive current and processes signal inputs for 4 catalytic sensors.
05704-A-0121	Quad Relay Interface Card	1 Slot	Links control modules to field wires, providing 4 sensor inputs and 4 master relay contacts.
05704-A-0131	Relay Interface Assembly	2 Slots	Combined stacked card pack expanding total configurable voltage-free contact outputs to 16 relays.
04200-A-0146	Analogue Output Module (Current Source)	Plug-in Accessory	Plugs onto the control card to export a duplicate, isolated 0/4-20mA driving signal per channel.
04200-A-0145	Analogue Output Module (Current Sink)	Plug-in Accessory	Plugs onto the control card to establish a duplicate, isolated 0/4-20mA loop path per channel.
05701-A-0361	System 57 Engineering Card	1 Slot	Central card managing rack bus control, signal checking, alarm testing, and PC programming.
05701-A-0325	System 57 DC Input Card	1 Slot	Houses external 24V power terminals, onboard RFI filtering, and a master backplane fuse.

System Compatibility

· Racking Equipment: Slides into standard System 57 19-inch racks (up to 16 control cards) or half 19-inch racks (up to 8 control cards).

· Interface Hardware: Plugs directly into the rear Quad Relay Interface Card or a high-density Relay Interface Assembly via the internal 32-way and 26-way D-type connectors.

· Peripherals: Interfaces across the common backplane data highway with the System 57 Engineering Card to update operational thresholds, alarm logs, and clock parameters.

Alternative Model & Differences

· Alternative Model: Four Channel Control Card Catalytic Input (Part Number 05704-A-0144).

· Key Differences:

o Input Signal Architecture: The 05704-A-0145 is designed exclusively to receive linear 4-20mA loop currents, whereas the 05704-A-0144 is engineered to drive and read mV catalytic bridge gas sensors.

o Transmitter Power Configuration: The 05704-A-0145 tracks standardized process loop signals generated by self-powered or loop-powered transmitters, while the catalytic model must provide precise, adjustable constant bridge currents to drive raw sensor beads directly.

o Module Interconnection: While both feature an identical front plate display, their internal input circuitry and hardware component layouts are completely unique to their respective sensor compatibility profiles.

Installation & Troubleshooting FAQ

Q1: How do I configure isolated remote data logging or chart recording outputs for each channel on the 05704-A-0145?

A: To export a remote copy of individual channel gas readings to a PLC or data logger, you must install optional Analogue Output Modules directly into the plug-in sockets on the 05704-A-0145 card body. One dedicated module is required per channel. You can select either the Current Sink module (Part Number 04200-A-0145) or the Current Source module (Part Number 04200-A-0146) depending on your external data tracking equipment.

Q2: Why is my 05704-A-0145 card signaling a constant fault state even though the field gas transmitter appears operational?

A: This card runs regular automated validation tests on the incoming analog line. If the field circuit breaks, short-circuits, or the transmitter drives an out-of-bounds current below 4mA or above 20mA, the module trips a fault alarm and illuminates the local FAULT LED. Verify the loop health using a multimeter to confirm the continuous sensor current stays within the acceptable 0mA to 25mA diagnostic safety window.

Q3: How do I alter the pre-defined gas alarm thresholds or update calibration settings on individual channels?

A: While individual channel resets can be performed via the front plate button, core parameters cannot be altered from the 05704-A-0145 interface alone. You must utilize the common Engineering Card located in the right-hand slot of the rack. Insert a physical Engineering Key into the serial interface socket of the Engineering Card to unlock the data highway, allowing you to cycle through settings and program new threshold parameters.

Contact information

Please don’t hesitate to contact us if you have any questions or concerns before or after your purchase. We are committed to your 100% satisfaction.

Sales Manager:Stella

Email:sales6@apterpower.com

Whatsapp:+86 18159889985

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