Transformer current transmitter DT1623 Ix

DIN railACfrequency output

Features

• Three versions with six selectable measuring ranges up to 60 AAC (selectable via front-panel Hi‑Lo switch)
• True RMS (TRMS) conversion for accurate AC measurement
• Frequency (square wave) output proportional to measured TRMS: 400–2000 Hz
• 0.5% output accuracy, frequency dependence ≤ 0.3%
• CAT III measurement category and EN 61010-1 compliant separation
• 24 VDC supply, low input consumption (0.25 VA max.)
• Compact 17.5 mm width, TS-35 DIN-rail mounting, IP20

Product description
The DT1623 Ix AC current transmitters provide a frequency (square wave) output between 400 and 2000 Hz proportional to the true root mean square (TRMS) of the input AC current. The frequency output enables replacing an analog input with a counter input on PLCs and signal processors, simplifying integration and reducing cost.

The devices are available in three versions covering six measuring ranges (selectable with the front-panel Hi‑Lo switch). Inputs are galvanically separated from the measured network via a broadband measuring transformer and meet CAT III requirements. The inputs tolerate continuous overcurrent up to 2 × nominal and short-time overcurrent up to 20 × nominal (1 s).

Lower-range versions permit wiring via a terminal block; higher ranges use a through-wire connection routed through the housing opening. A green front‑panel LED indicates device status (steady = normal operation, flashing = fault). The transmitter is a 17.5 mm wide terminal-block device, rail-mountable and compliant with EN 60688.

Technical specifications (table)
Safety data: Input and output terminals are electrically separated; separation per EN 61010-1.
Pollution level: 2
Measurement category: CAT III

Input parameters:
Input signal: AC current
Measuring ranges: see type designation (switch-selectable)
Conversion: true RMS
Continuous overcurrent: 2 × I_nominal
Short-time overcurrent (1 s): 20 × I_nominal
Input consumption: 0.25 VA (max.)
Frequency range (input): 40–400 Hz

Output parameters:
Output signal: frequency (square wave)
Output range: 400–2000 Hz
Settling time: 500 ms (10–90%)
Output signal error: < 0.5%
Output levels: Lo < 0.2 V; Hi > 21 V (Rt: 2–20 kΩ)
Temperature coefficient: < 25 ppm/°C (0–60 °C)
Frequency dependence: <= 0.3% (40–400 Hz)
Supply voltage dependence: negligible

Power supply:
Supply voltage: 24 VDC ±10%

Ambient conditions:
Operating temperature: 0–60 °C (optionally −20–60 °C on request)
Relative humidity: up to 90% (non‑condensing)
Installation: cabinet
Recommended mounting position: vertical (on horizontal rail)

EMC: EN 61326-1. Emission: Group 1, Class B. Immunity: industrial area.

General data:
Housing: TS-35 rail mounting, polyamide PA6.6
Output connection: screw terminal
Input connection: screw terminal (<= 10 AAC) / through connection (> 10 AAC)
Through connection capacity: 10 mm2 (≤ 40 AAC), 16 mm2 (> 40 AAC)
Dimensions: 17.5 × 104 × 115 mm (W × H × D)
Weight: 0.100–0.125 kg
Protection: IP20

Technical data / specifications

• Model: DT1623 Ix
• Input: AC current, true RMS conversion
• Measuring ranges: selectable across six ranges (three device versions)
• Output: frequency (square wave) 400–2000 Hz
• Accuracy / output error: < 0.5%
• Supply voltage: 24 VDC ±10%
• Continuous overcurrent capability: 2 × nominal
• Short-time overcurrent (1 s): 20 × nominal
• Input consumption: 0.25 VA (max.)
• Operating temperature: 0–60 °C (option for −20–60 °C)
• Dimensions: 17.5 × 104 × 115 mm
• Protection rating: IP20