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Available on request

Honeywell – 420-I Digital to Analog Output Converter: Modbus RS-485 to 4 to 20mA

MPN: 420-I · Brand: Honeywell

Price on request

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12-month warranty (new) · 3-month (used/refurbished)

30-day returns, no restocking fee on unused parts

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Quick facts

Availability	Confirmed on request
Category	Honeywell Gas & Flame Detection
Lifecycle	Active
Warranty	12-month (new) · 3-month (used/refurbished)

Shipping & availability

When can 420-I be shipped?

420-I is sourced on request — request a quote and we'll confirm the exact availability and shipping timeline for this specific unit.

Can I pick up 420-I in person?

Local pickup from our Groningen, Netherlands warehouse may be possible — contact us before ordering to check availability and arrange a collection time.

Is express delivery available?

Yes — mention it when you request a quote for 420-I and we'll include express shipping options in our reply.

My factory is down and I need this urgently — can you help?

For a critical breakdown, contact us directly at +31 (0)50-7110348 or sales@partnerplc.com — we can look into same-day courier or dedicated taxi/hotshot delivery for 420-I, subject to availability and destination.

Part of Honeywell's 301C Controller range. Designed for simple installation and operation, the 301C continuously monitors and controls toxic gases, combustible gases and oxygen hazards.

Product Overview:

Using an addressable RS-485 Modbus communication protocol, the 301C uses daisy chain wiring requiring only 2 pairs of wires to connect up to 96 transmitters on the 3 input channels. This simplifies installation, in turn lowering costs. The 301C’s zoning and averaging abilities significantly reduce operational and maintenance costs.

Zoning / Averaging:

The 301C controller offers unique zoning capabilities which permit the averaging and comparison of multiple sensor readings. Zoning can reduce operational costs by ensuring that localized brief fluctuations registered at a single transmitter do not activate relays. For example, a car idling in a parking structure may locally increase a reading at a nearby transmitter. Rather than activating a fan as a result of the temporary localized fluctuation, zoning can be used to limit relay activation until the average reading for a zone exceeds a set-point. This can reduce run time of fans, yielding savings in both energy usage and wear and tear. The 301C has the capacity to manage input from three Modbus channels for up to 96 transmitters and up to 50 wireless transmitters that can be associated with up to 126 zones. Transmitters can belong to an unlimited number of zones, providing maximum operational and control flexibility.

Additional Features and Benefits:

Zero maintenance

User Friendly

Automatic quick self-test and warm-up

Continuous alphanumeric display

Inexpensive and Reliable:

Low installation costs

Allows for up to 126 zoning groups which can save energy and extend fan and relay life

Manages up to 768 events with programmable latching alarms

Flexible Operation:

Optional BACnet/IP available

Interchangeable transmitters able to detect different gases

Expands to handle up to 96 transmitters or relay modules

Programmable time delays

Integrated time clock enables scheduling of system operations

Safety Measures:

Full array of visual indicators and integrated 65dBA alarm levels

Fully programmable relays (can be set as fail-safe or not)

Beneficial Options:

Available in a heavy-duty industrial housing

Datalogging option

Features & Benefits:

User friendly with zero maintenance

Low installation costs

Automatic quick self-test and warm-up

Quick Specs:

Power requirement: 17-27 VAC, 24-38 VDC, 500 mA

Size: 11 (W) x 8 (H) x 2.8 (D) in. (28 x 20.3 x 7 cm)

Weight: 2.4 lbs. (1.1 kg)

Honeywell 420-I — Digital to Analog Output Converter: Modbus RS-485 to 4 to 20mA (301C Controller). PartnerPLC sources new, surplus and discontinued Honeywell parts — request a quote for price, condition and lead time.