Field Instruments

General

This standalone micro-controller based LCD temperature controller provides proportional plus integral (P+I) and on/off temperature control for commercial Heating, Ventilating & Air Conditioning System such as Hydronic Heating, Air Handling Unit, Heat Exchanger or Condensing Tower. This controller has a modulating analog 2 to 10Vdc or 4 to 20mA output and a 2A on/off output to realize various optional control functions including cool/heat changeover, heat/cool sequence control, emergency interlocking and auto-alarming control.

Features

• PI (proportional plus integral) control action provides accurate, stable and comfortable temperature control.
• Compatible with series 70 direct-coupled damper / valve actuator like ML7161, ML7174, ML7420 / ML7421series ML7425, ML7984 series, N20010, S10010, M7410E  series, CN7505, CN7510 / CN72 series CN7220 & CN7234 also VC79 series etc. •Backlit LCD to display both setting and measured value.
• Adjustable Zero Energy Band, On/Off Differential, Proportional Band and Temperature Offset.
• Analog output can be forced manually to be convenient for installation & commissioning.
• Optional 2 to 10Vdc or 4 to 20mA direct acting and reverse acting analog output.
• Selectable internal and external temperature sensor.
• Wide temperature control range (-20 to 110 °C by using external temperature sensor) is suitable for extreme temperature control such as steam and ice water. •Watch Dog Timer: to resume the controller from hanging condition.
• Brownout effect to avoid malfunctioning and care on power ON and power OFF.
• Pluggable terminal block allows pre-wiring outside of the controller.
• Compact size and slim design provide elegant and attractive modern style appearance.

Specifications

• Make : Honeywell
• Model: T2798I2000
• Inputs: Inputs 1) Analog - 1 No. 2) Digital - 1 No.
• Outputs: 5-50°C (internal temperature sensor)-20-110°C (external temperature sensor)
• Setpoint Range: >AC24V ±20%, 50/60Hz, 2 VA.
• Power Supply: 2 to 10Vdc OR 4 to 20mA.
• Analog output: Digital Output:2A, 24Vac
• Terminals: Plug-in screw terminals are suitable for 1.5 square mm wire

Fieldinstruments.lk
50/3, Angampitiya Rd, Ethul Kotte, Sri Lanka. 10100.
Phone: +94718555888 Email: info@fieldinstruments.lk