Transformer current transmitter DT1622 Ix

DIN railAC4-20 mA

Product features

• 3 versions, 6 measuring ranges: 0–1 AAC / 0–5 AAC (switch selectable), 0–10 AAC / 0–20 AAC (switch selectable), 0–40 AAC / 0–60 AAC (switch selectable)
• True RMS conversion (TRMS)
• Measurement category: CAT III
• Passive 4–20 mA output (two-wire, loop-powered)
• Accuracy: 0.5% (output), output error 0.2% max.
• Supply: 12–33 VDC, loop-powered
• 17.5 mm wide, TS-35 rail-mountable terminal housing
• Compliant with EN 60688 and separation per EN 61010-1
• Front-panel green indicator: continuous = OK, flashing = fault

Product description
The DT1622 AC current transmitter converts the true effective value (TRMS) of the measured AC current into a proportional 4–20 mA signal for remote processing. It is a passive two-wire device powered by the 4–20 mA loop (12–33 VDC).

Three hardware versions cover six measuring ranges; within each version the range is selected using the front-panel Hi–Lo switch. The 5/1 AAC input version can be extended using an external current transformer with ratio x/5 or x/1. Inputs are isolated from the measured network via a wideband measuring transformer and meet CAT III requirements.

The device accepts permanent overcurrent up to 2× nominal and short-term up to 20× (1 s). For I5/I1 ranges the conductor is connected to screw terminals; for higher ranges the conductor is routed through the side feed-through. A green LED indicates operating status.

Designed as a compact 17.5 mm TS-35 rail-mounted module, the DT1622 is suitable for instrument cabinets and industrial automation panels. Full compliance with EN 60688 ensures interoperability in control systems.

Technical specifications

• Safety data: Input and output separation complies with EN 61010-1; pollution degree: 2; measurement category: CAT III
• Input characteristics:
  • Input current: see type designation (0–1/0–5, 0–10/0–20, 0–40/0–60 AAC)
  • Conversion: true RMS
  • Continuous overcurrent: 2 × In
  • Short-term (1 s) overcurrent: 20 × In
  • Input consumption: ≤ 0.25 VA
  • Frequency range: 40–400 Hz
• Output characteristics:
  • Output: 4–20 mA, passive (two-wire)
  • Terminal resistance: ≤ 500 Ω
  • Overvoltage protection: 35 V limiter
  • Overcurrent protection: 24 mA limiter
  • Settling time: 500 ms (10–90%)
  • Output signal error: ≤ 0.2%
  • Temperature dependence: 25 ppm/°C (0–60 °C)
  • Frequency dependence: ≤ 0.3% (40–400 Hz)
• Power supply: 12–33 VDC (loop-powered)
• Environmental conditions:
  • Operating temperature: 0–60 °C (–20–60 °C on special order)
  • Relative humidity: ≤ 90% non-condensing
  • Installation: instrument cabinet, vertical on horizontal rail
• EMC: EN 61326-1 — Emission: Group 1 Class B; Immunity: industrial environment
• General data:
  • Design: TS-35 rail-mounted terminal housing, polyamide PA6.6
  • Electrical connections input/output: screw clamp (feed-through for >5 AAC)
  • Connecting wire cross-section: 0.25–2.5 mm²; with feed-through: 10 mm² (≤ 40 AAC), 16 mm² (> 40 AAC)
  • Dimensions (W×H×D): 17.5 × 104 × 115 mm
  • Weight: approx. 0.100–0.125 kg
  • Protection: IP20
• Further technical data available in the operating instructions; manufacturer may change individual specifications.