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
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General
Application Heating - heating/cooling Approval EN 1434; MID 2014/32/EU; CH-MI004-14020 (for heating application) Protection class IP 54 Main power supply 100-240VAC 50/60Hz max. 15 VA /12-42 VDC or 12-36 VAC max. 1 VA (according EN1434) Main pulse input For 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 value l/pulse 1, 10, 100, 1,000 (depending on size of flow sensor) Installation On the forward or return pipe (factory settings) Temperature sensors Pt 100 4 wires or Pt 500 2 wires Calculation cycle 1 s Back up battery realtime clock 3.6V lithium battery -
Basic features
Ambient class EN 1434 Class C Electromagnetic compatibility (EMC) 2014/30/EU Ambient temperature °C +5 ... +55 Storage temperature °C 0 ... +60 Standard interface Optical M-Bus interface Optional interfaces Modular version: up to 3 analog outputs. Up to 2 communication interfaces freely combinable: M-Bus, Modbus, BACnet, N2Open, KNX or LON Data memory protection In EEPROM > 10 years -
Display
Display indication LCD, 8-digit Units KWh, MWh, MJ, GJ, KBtu, MBtu, m³, USGal Total values 99,999,999 - 9,999,999.9 - 999,999.99 - 99,999.999 Values displayed Energy - 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 #2 OUTPUT (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 #3 OUTPUT (default option): max. 48VDC / 100mA / Pulse freq. max.: 4Hz. INPUT: Open-circuit voltage: 8V / Freq. max.: 20Hz M-Bus interface Conforming to EN 13757 / 2,400 bauds Modbus RTU RS485 / 19,200 Bauds / parity even LON interface LON TP-FT 10, certified to LON MARK® 3.4. BACnet MS/TP RS485 / ID:431 N2Open RS485 / 9,600 Bauds KNX TP1 type (KNX certification) / 9,600 bauds / max. admissible power: 10 mA Analog outputs Up to 3 analog outputs: 4 ... 20mA or 0 ... 20mA / Supply voltage: 6 ... 24VDC / Electrical insulation: max. 48VDC Optical interface Conforming to IEC 870-5 / M-Bus protocol -
Temperature input
Approved temperature range °C 0 ... +200 (heat carrier: water) Temperature range °C -40 ... +180 (special heat carrier) Approved heating delta temperature range 3 ... 190K, 1 ... 190K according to EN1434-3 Delta temperature range 0 ... 190K -
Dimensions
Dimensions in mm
