TCW220 Ethernet Data Logger

TCW220 Ethernet Data Logger Systems

An Ethernet data logger for use in common data acquisition applications is the TCW220. It features two discrete inputs and two 10-bit-resolution analog inputs. Up to eight Teracom 1-Wire sensors, including those for carbon dioxide, 0/20 mA, AC/DC current, temperature, humidity, etc., are supported by a 1-Wire interface. Two relays with typically open and normally closed contacts are further included in the Ethernet data logger.
All monitored metrics have the option of being recorded for a previous time frame or in response to an alarm. The memory can store records for every minute for at least 36 days. On a dedicated server, the log file can be routinely posted via HTTP Post.

Periodically, an XML/JSON file containing all monitored parameters can be uploaded via HTTP Post to the dedicated server. For example, an answer server may return instructions for relay control. This is how a SCADA system is built.
The relays can be turned on locally based on the state of monitored parameters or remotely (via WEB, SNMP, HTTP, MODBUS TCP/IP, etc.). Up to five recipients can receive emails and SNMP traps for each parameter. Additionally, an HTTP post containing XML or JSON status files can send an alarm alert.


  • Ethernet data logger standalone with up to 70000 recordings;
  • Web-based configuration and control that is password-protected;
  • Two digital inputs with "dry contact"
  • Two analog inputs with a 10-bit resolution and a 0 to 10VDC range;
  • Offset and multiplier for analog inputs;
  • Two relays with contacts for NO and NC;
  • 8 Teracom sensors can be connected via a 1-wire interface;
  • Support for SNMP version 2; SNMP traps for up to 5 recipients, such as an alarm alert;
  • MODBUS TCP/IP support;
  • TLS 1.0, TLS 1.1 and TLS 1.2 support;
  • e-mails to up to 5 recipients like alarm alert;
  • XML/JSON status files;
  • HTTP API commands;
  • NTP support;
  • Dynamic DNS support;
  • Periodical HTTP Post for client-server systems;
  • Remote firmware update.


  • Independent or system data logger over Ethernet
  • Control for the heater or air conditioner
  • SCADA systems of various sizes
  • Storage facility Ethernet data logger
  • Automation of industrial processes; environmental control and monitoring in the wine and mushroom industries.

Supported Sensors

  • TST100 1-Wire Temperature Sensor
  • TST103, a temperature sensor with a 1-Wire interface
  • TSH202, a 1-wire humidity and temperature sensor
  • Temperature and humidity sensor with 1-Wire connection, TSH206
  • TSC200, a single-wire galvanic isolated AC/DC current sensor
  • 1-Wire interface-enabled galvanic isolated voltage sensor TSV200
  • Transmitter for 0/20 mA current loop, one-wire galvanic isolated, model TSA200
  • TSG200 1-Wire Carbon Dioxide Sensor

Technical Properties:

  • Physical characteristics
  • Dimensions: 115 x 90 x 40 mm
  • Weight: 170 g
    • Environmental limits
  • Operating temperature range: -20 to 55°C
  • Storage temperature range: -25 to 60°C
  • Operating relative humidity range: 5 to 85% (non-condensing)
    • Warranty
  • Warranty period: 3 years
    • Power requirements
  • Input Voltage: 10 to 28 VDC
  • Input Current: 240 mA @ 12 VDC (with all relays ON)
  • • Digital inputs
  • Isolation: Non isolated
  • Mode: Dry contact
  • Maximum input voltage: +5.5VDC
  • Sampling rate: 10mS
  • Digital filtering time interval: 30mS
  • Analog inputs
  • Isolation: Non isolated
  • Type: Single ended
  • Resolution: 10 bits
  • Mode: Voltage
  • Input Range: 0 to 10 VDC
  • Accuracy: ±1%
  • Sampling Rate: 500mS per channel (averaged value of 500 samples)
  • Input Impedance: 150 kilo-ohms (min.)
    • Relay outputs
  • Type: Form C (N.O. and N.C. contacts)
  • Contact current rating: 3 A @ 24 VDC/30 VAC (resistive load)
  • Initial insulation resistance: 100 mega-ohms (min.) @ 500 VDC
  • Mechanical endurance: 10 000 000 operations
  • Electrical endurance: 100 000 operations @ 3 A resistive load
  • Contact resistance: 50 milli-ohms max. (initial value)
  • Minimum pulse output: 1 Hz at rated load
    • 1-Wire interface
  • Output voltage (+VW): 5.0 ± 0.3 VDC
  • Maximum output current (+VW): 0.2 A
    • Internal FLASH memory
  • Endurance: 100 000 cycles (Every settings change is a memory cycle.)