There are still some products that have not been listed yet. For more information, please contact us. If the product model does not match the displayed picture, the actual model shall prevail. Please consult us for specific product images; We will arrange for the warehouse to take photos for confirmation. We have 76 shared warehouses worldwide, so it may take several hours to accurately respond to your message. We deeply apologize for any inconvenience caused to you. Of course, we will process your inquiry as soon as possible.

Honeywell Analytics 05704-A-0145 System 57 Quad 4-20mA Input Module

The 05704-A-0145 control card manages the processing, display, and alerting data for up to four remote gas detection transmitters. Each of the four channel paths acts as an isolated current source interface supplying a stabilized 24V DC loop-power circuit back to field sensors.

When a transmitter sends a fluctuating mA signal, the card maps the reading against user-defined software values. Alarm indicators are clearly displayed via front-panel LEDs, split per channel for A1, A2, A3, fault, and circuit inhibit states. For easy maintenance, a single front-panel button lets technicians select individual channels to perform zero/span calibrations through the master Engineering Card or manually clear latched field alarms.

• Four-Loop High Density Form Factor: Quadruples your rack efficiency by squeezing four separate monitoring nodes into a single-slot Eurocard configuration, dramatically lowering the size and cost of the central control panel.

• Smart Display Sequencing: The multi-mode back-lit LCD can be configured to scroll automatically through all four loops, stay locked on the highest current reading, or display specific channel numbers for clear operation.

• Flexible Output Integration: Features a dedicated 26-way D-type front connector interface designed to link directly into specialized Quad Relay cards or 0-20mA/4-20mA isolated analog tracking add-ons.

• Advanced Multi-Alarm Logic: Supports layered safety logic across all four channels, allowing users to configure master alarms, zoned boundaries, and multi-sensor voting structures.

• Non-Volatile Memory Retention: Keeps all system calibrations, alarm setpoints, and loop configuration profiles completely secure in on-board EEPROM, meaning no data is lost during total power failures.

• Petrochemical and Refinery Sub-Stations: Tracks multi-point pipeline corridors and tank farms for combustible leaks by gathering inputs from line-of-sight and point gas detectors.

• Municipal Wastewater Galleries: Fits into compact wall-mount panels to track methane, hydrogen sulfide, and oxygen depletion in wet wells and valve vaults.

• Manufacturing and Gas Storage Rooms: Monitors multi-zone industrial gas storage yards, packaging rooms, and indoor cylinder clusters simultaneously.

• Marine Vessel and Cargo Holds: Installed in vessel engine spaces and pump rooms, providing highly compact multi-point monitoring that stands up to severe vibrations.

Q1: Can the 05704-A-0145 card be used directly with passive, 2-wire catalytic bead sensors?

A: No, it cannot. The 05704-A-0145 is built to receive active 3-wire or loop-powered 4-20mA signals. If you need to wire passive catalytic bead sensors directly without a field transmitter, you should use the companion catalytic model, Part Number: 05704-A-0144.

Q2: How does the display handle multiple channels if two or more go into a simultaneous gas alarm state?

A: The card features built-in priority display logic. If you choose the "Highest Reading" mode, the backlit LCD automatically locks onto and displays the channel with the most severe gas concentration level. At the same time, the dedicated red alarm LEDs for all triggered channels will light up on the front panel, ensuring you don't lose track of any active loops.

Q3: What is the purpose of the 26-way D-type front connector plug (SK1)?

A: The SK1 front connector provides a clean interface link to route the card's internal alarm states out to external devices. It typically wires straight into the Quad Relay Interface Card (such as the 05704-A-0121) or a larger 16-Relay Interface Assembly, mapping the digital alarms to physical dry contacts for horns, strobe lights, or exhaust ventilation controls.

Q4: Is it safe to unplug an individual 05704-A-0145 card from a live rack during maintenance?

A: Yes. The System 57 backplane supports hot-swapping for maintenance. You can remove and replace the 05704-A-0145 card without powering down the entire rack enclosure or disrupting active monitoring processes on neighboring cards.

Do you provide global shipping services?

Yes. We have local distribution centers on all continents, which can quickly transport parts to any corner of the world.

2. What payment methods and currencies do you accept?

To make your purchasing process as simple as possible, we offer multiple payment methods including bank transfer, check, and PayPal. Meanwhile, we also accept most mainstream credit and debit cards, such as Visa, Mastercard, and American Express. We can accept payments in most major currencies worldwide, but we recommend using US dollars (USD), British pounds (GBP), or euros (EUR) as a priority. Payments in other currencies may incur additional fees. All transactions are securely processed by HSBC Bank and HSBC Merchant Services.

How many parts do you currently have in stock?

We have a vast inventory of thousands of new, refurbished, and outdated automation components, including products from well-known manufacturers such as ABB and Schneider. If you cannot find the required parts, please do not worry. We work closely with a global network of professional suppliers to provide you with tailored quotes even if the part is not listed on our website.

Who can I contact if I encounter any problems?

Our experienced customer service team will handle any issues after you place your order.