Rosemount 3490 Universal Control and Display Unit

The Rosemount 3490 Series of wall and panel mounted control units provide comprehensive control functionality for any 4-20 mA or HART® compatible transmitter. A back-lit display gives clear visual indication of the measured value and status of all inputs and outputs. The 3490 provides an intrinsically safe 24V dc power supply to the transmitter. Five relays are provided and are fully field programmable to perform a wide variety of control, fault indication or alarm duties.

• Tough weatherproof wall mount enclosure for internal or external mounting
• Accepts any 4-20 mA or HART compatible input
• Five field adjustable control relays
• Bright local display of measured value
• Pre-programmed with tank shapes, flow algorithms and pump control routines to simplify configuration

Models	3491 - Standard Control Unit 3492 - Differential Control Unit 3493 - Logging Control Unit
Mounting style	Wall mount or Panel mount
Power options	115 / 230Vac or 24Vdc
Current Input	4-20mA (Earth referenced in control unit) or HART digital communications (Rev. 5)
Display	Dot matrix LCD, 32 x 122 pixels, back lit
Relays	5 SPCO (SPDT), 5A at 240V ac
Trigger Inputs	2 voltage-free contact closures
Update rate	5 times per second
Materials of construction (IP-rated wall mount)	Polycarbonate enclosure and cover.
Materials of construction (panel mount)	Polyphenylene oxide enclosure and polycarbonate cover.
Materials of construction (NEMA4X-rated wall mount)	Polyester and monel fastening.
Ambient temperature	-40 °C to +55 °C (-40 °F to + 131°F)
Certification	CE-mark, ATEX, IECEx, CSA, or UL