Electronic Lead/Lag Controller 2430

Sierra Monitor’s Electronic Lead/Lag Controller 2430 is a microprocessor-based module which performs all heating, ventilating and air conditioning (HVAC) controls and environmental alarm management in remote, above ground telecommunications structures.

A compact, cost-effective solution, the Model 2430 assures a precisely controlled and safe environment and personnel working within the structure. It provides demand logic control for two air conditioning units for heating, cooling, and economizer operation. Lead air conditioner cycle period, lead and lag set points, short cycle delay, and economizer set points are fully adjustable.

The Lead/Lag Controller 2430 is designed to operate on both AC and DC power. This provides the capability to alarm upon loss of commercial AC power and continue to monitor the structure for alarms and operate DC ventilation fans for cooling in the absence of HVAC operation. Since all data is stored in flash memory, power outages do not result in lost data nor is there the need for periodic battery replacement.

Electronic Lead/Lag Controller 2430

  • Microprocessor-Based Lead/Lag Temperature Control – Fully adjust lead air conditioner cycle period, lead and lag set points, short cycle delay, and economizer set points
  • Operator-Friendly Front Panel – Display lead and lag set points for both cooling and heating, high and low temperature alarm set points and status of alarms and controls with conveniently labeled keys
  • Slim Profile – Affords easy wall mounting with minimum protrusion from the wall and fully access the front panel for ease of field wiring

Specifications for Electronic Lead/Lag Controller 2430

System

  • Power
    • 120 VAC, 50/60 Hz
    • 220 VAC, 50/60 Hz
    • 12-50 VDC
    • 5 Watts nominal
  • Microprocessor
    • PIC Controller 16F877
    • 8 Kbytes EEPROM
    • 256 bytes EPROM

Environmental

  • Temperature
    • Operating Range: 4o to 122oF (-20o to 50oC)
    • Storage Range: -40o to 122oF (-40o to 50oC)
  • Humidity
    • 0 – 95% RH

Front Panel

  • Display: LCD alphanumeric (2 rows x 16 characters)
  • Keypad: 6 keys for set points, alarms, controls

Sensors

  • Temperature
    • Range: 0o to 120oF (-15o to 49oC)
    • Accuracy: +/- 1oF (from 50o to 100oF)
  • Humidity (Optional)
    • Range: 0-100% Relative Humidity
    • Accuracy: +/- 2% Relative Humidty

Mechanical

  • Enclosure: Sheet Metal Electrical Cabinet
  • Mounting: Brackets for surface mounting
  • Conduit Connections: Knockouts for ½” and ¾” conduit
  • Dimensions: 10.5” x 9.3” x 2.15”
  • Weight: 5 lb. (2.2 Kg)

Inputs (Total Digital Inputs: 8)

  • Integral
    • Temperature
    • Relative Humidity (Optional)
  • Digital
    • Intrusion
    • Commercial Power Loss
    • Smoke Alarm
    • A/C 1 Fail
    • A/C 2 Fail
    • Spare (Qty. 3)

Outputs

  • Controls: SPDT, 5 Amp, 24 VAC (Total Control Relays: 9)
    • Cooling 1
    • Heater 1
    • Blower 1
    • Economizer 1
    • Cooling 2
    • Heater 2
    • Blower 2
    • Economizer 2
    • High Temperature Ventilation
  • Alarms: SPST, 0.5 Amp (Total Alarms: 10)
    • High Temperature
    • Low Temperature
    • Intrusion
    • Smoke
    • A/C 1 Fail
    • A/C 2 Fail
    • Commercial Power Fail
    • Spares (Qty. 3)

Options

  • RH Sensor: Factory installed for internal relative humidity
  • Temp Sensor: External temperature sensor
  • Mounting Brackets: Top/Bottom or side brackets (Alternative to flush cabinet base mount)

How to Purchase the Electronic Lead/Lag Controller

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