CALEC ST II

CALEC ST II

ENERGY CALCULATOR

CALEC ST II is a high-precision calculator designed to meet European standards, it measures heating and cooling energy. It can be used in heating or combined mode. Easy to program on-site, CALEC ST II enables the utility to monitor and optimize its metering remotely. It can be directly connected to a Centralized Technical Management unit, to provide large quantities of instant or saved parameters.

  • MID approved
  • Combined measuring heating/cooling option
  • GLYCOL tables integration in option
  • Approved temperature measuring range: 0 to +200°C
  • Approved temperature difference 1 to 190K according to EN 1434-4
  • Extended main voltage ranges available (100-240 VAC, 12-36 VAC, 12-42 VDC)
  • Integrated 3.6VDC and 24VDC flow sensor (main power supply)
  • Pt100 4 wires or Pt500 2 wires temperature sensors
  • Modular version: up to 3 analog outputs, up to 2 communication interfaces freely combinable: M-Bus, Modbus, BACnet, N2Open, KNX or LON (certified LonMark 3.4)
  • 2 pulse outputs also usable as auxiliary meter inputs
  • Optical or wired M-Bus interface
  • Data backup
  • General
    ApplicationHeating - heating/cooling
    ApprovalEN 1434; MID 2014/32/EU; CH-MI004-14020 (for heating application)
    Protection classIP 54
    Main power supply100-240VAC 50/60Hz max. 15 VA /12-42 VDC or 12-36 VAC max. 1 VA (according EN1434)
    Main pulse inputFor NAMUR with potential-free contact (reed relay) or Solid State Relay: Open-circuit voltage: 8V / short-circuit current: 8mA / Switching level:<1.5mA, >2.1mA / Min. OFF (t off): 20Hz 20ms / Min. ON (t on): 20Hz 3ms / Min. OFF (t off): 200HZ 2ms / Min. ON (t on): 200Hz 300µs
    Pulse valuel/pulse1, 10, 100, 1,000 (depending on size of flow sensor)
    InstallationOn the forward or return pipe (factory settings)
    Temperature sensorsPt 100 4 wires or Pt 500 2 wires
    Calculation cycle1 s
    Back up battery realtime clock3.6V lithium battery
  • Basic features
    Ambient classEN 1434 Class C
    Electromagnetic compatibility (EMC)2014/30/EU
    Ambient temperature°C+5 ... +55
    Storage temperature°C0 ... +60
    Standard interfaceOptical M-Bus interface
    Optional interfacesModular version: up to 3 analog outputs. Up to 2 communication interfaces freely combinable: M-Bus, Modbus, BACnet, N2Open, KNX or LON
    Data memory protectionIn EEPROM > 10 years
  • Display
    Display indicationLCD, 8-digit
    UnitsKWh, MWh, MJ, GJ, KBtu, MBtu, m³, USGal
    Total values99,999,999 - 9,999,999.9 - 999,999.99 - 99,999.999
    Values displayedEnergy - Power - Volume - Flowrate - Temperature
  • Interface
    Main pulse input #1 (10/11)For NAMUR with potential-free contact (reed relay) or Solid State Relay
    Switchable pulse input and output (100/101). output #1 (default option) / input #2OUTPUT (default option): max. 48VDC / 100mA / Pulse freq. max.: 4Hz. INPUT: Open-circuit voltage: 8V / Freq. max.: 200Hz
    Switchable pulse input and output (102/103): output #2 (default option) / input #3OUTPUT (default option): max. 48VDC / 100mA / Pulse freq. max.: 4Hz. INPUT: Open-circuit voltage: 8V / Freq. max.: 20Hz
    M-Bus interfaceConforming to EN 13757 / 2,400 bauds
    Modbus RTURS485 / 19,200 Bauds / parity even
    LON interfaceLON TP-FT 10, certified to LON MARK® 3.4.
    BACnet MS/TPRS485 / ID:431
    N2OpenRS485 / 9,600 Bauds
    KNXTP1 type (KNX certification) / 9,600 bauds / max. admissible power: 10 mA
    Analog outputsUp to 3 analog outputs: 4 ... 20mA or 0 ... 20mA / Supply voltage: 6 ... 24VDC / Electrical insulation: max. 48VDC
    Optical interfaceConforming to IEC 870-5 / M-Bus protocol
  • Temperature input
    Approved temperature range°C0 ... +200 (heat carrier: water)
    Temperature range°C-40 ... +180 (special heat carrier)
    Approved heating delta temperature range3 ... 190K, 1 ... 190K according to EN1434-3
    Delta temperature range0 ... 190K
  • Dimensions
    Dimensions in mm