Description
The EKMA sits in the connection head and turns the signal of a resistance thermometer into an impressed current of 4 to 20 mA. It accepts Pt100 in two-, three- and four-wire connection, Pt1000 in two-wire connection and Ni100 in two-, three- and four-wire connection; the measuring range reaches from −200 to 800 °C with Pt100 and Pt1000, and from −50 to 170 °C with Ni100. The manufacturer gives the accuracy as at most 0.1 % of the measuring range or 0.2 °C, and the resolution as 16 bit. The device is supplied out of the current loop with 6 to 32 V DC and needs no auxiliary energy of its own. It is set without contact over RFID: measured quantity, type of connection and measuring range can be changed at any time with the EKMH configurator and its software. The black PA66 case measures Ø 45 × 23 mm, weighs about 35 g and is rated IP20 for mounting inside the connection head.
Input and output
- Pt100: 2-, 3-, 4-wire, −200 … 800 °C
- Pt1000: 2-wire, −200 … 800 °C
- Ni100: 2-, 3-, 4-wire, −50 … 170 °C
- Output 4 … 20 mA, 2-wire
- Accuracy max. 0.1 % of range or 0.2 °C
- Resolution 16 bit (1 µA)
- Signal on error 21.5 mA or 3.8 mA
- Cable resistance up to 20 Ω
Device and connection
- Supply 6 … 32 V DC out of the current loop
- Configuration over RFID (NFC)
- Case synthetics PA66, black
- Dimensions Ø 45 × 23 mm, approx. 35 g
- Terminal screws, conductor to 1 mm²
- Protection class IP20
- Operating temperature −40 … 85 °C
- EN 61000-6-4 and EN 61000-6-2
All technical data, dimensions and available versions are listed in the datasheet for download.