Galvanic signal isolator DT1122

currentvoltage4-20mA

Product features

• signal splitting: transmission of an input signal to two independent outputs
• switch-selectable signal ranges on inputs and outputs: 0-20 mA / 4-20 mA / 0-10 V / 2-10 V (in any combination)
• 4-way isolation
• 20 V transmitter power at the input for two wire transmitters
• non-linearity: < 0,02% TYP
• temperature coefficient: 25 ppm / °C TYP
• 24 VDC ±10% or 230 V AC/DC ±10% power supply
• TS-35 rail mounting, 12.5 mm width

Product description
The DT1122 transmits the signal of a transmitter (or other signal source) connected to its input to two galvanically isolated outputs.
This feature may be required for applications where two parallel signal processors (PLC, DCS) are operating or a local indicator of the transmitter signal is required in addition to the signal processor.
Galvanic isolation is 4-way, i.e. the input, outputs and power supply are galvanically isolated of each other.
The input and output signal ranges can be selected in any combination using the front switches.
The signal ranges are as follows:

• 0-20 mA / 4-20 mA current or 0-10 / 2-10 V voltage.

A 20 V / 24 mA transmitter power is available at the input to power passive 4-20 mA two-wire transmitters.
The device has two inputs:

• current: 0-20 mA / 4-20 mA *
• voltage: 0-10 V / 2-10 V *

* only one input can be used at a time
and two outputs:

• output 1: 0-20 mA / 4-20 mA / 0-10 V / 2-10 V
• output 2: 0-20 mA / 4-20 mA / 0-10 V / 2-10 V

The device can be ordered with two types of power supply:

• DT1122: 24 VDC ±10%
• DT1122 PS: 230 V AC/DC ±10%

The transmission characteristics are outstandingly good: non-linearity < 0,02% TYP, temperature coefficient: 25 ppm / °C TYP.
Front LED indicators provide information on the presence of power and possible fault conditions.

Technical specification
Safety data: The connection terminals of the input the outputs and the supply voltage are isolated from each other, the isolation is in
compliance with the standard EN 61010-1, taking into consideration the following:

• Pollution level: 2
• Measurement category: II

Input parameters (current):

• Input signal: DC current
• Ranges: see previous page
• Input resistance: 10,6 ohm
• Overload: 400 mA

Input parameters (voltage):

• Input signal: DC voltage
• Ranges: see previous page
• Input resistance: 102 kohm
• Overload: 100 V

Transmitter power supply:

• Transmitter power supply: > 20 VDC @ 20 mA load
• Overcurrent protection: 25 mA
• Number of output channels: 2

Output parameters (current):

• Output signal: DC current
• Ranges: see previous page
• Load resistance: ≤ 500 ohm
• Overdriving ability: 22.5 mA

Output parameters (voltage):

• Output signal: DC voltage
• Ranges: see previous page
• Load resistance: ≥ 500 ohm
• Overdriving ability: 11 V

Transmission characteristics:

• Output signal error: 0.1% FSR @ 25 ºC ±2 ºC
• Non-linearity: 0,02% (max.)
• Temperature coefficient: 25 ppm / °C TYP, 50 ppm max.
• Supply-voltage effect: practically zero
• Settling time: 250 ms (10-90%) / 300 ms (99%)

Galvanic isolation:

• Working voltage: 250 Veff (between the input, the outputs and the power supply terminals)
• Test voltage: Type test: 4250 VDC (1 min.), Routine test: 2500 VDC (1 min.)

Power supply:

• Supply voltage: DT1122: 24 VDC ±10%, DT1122 PS: 230 V AC/DC ±10%,
• Power consumption: DT1122: ≤ 2,2 W DT1122 PS: 3,3 W, 5,2 VA

Ambient conditions:

• Operating temperature range: 0-50 °C (-20 °C-60 °C for customer request)
• Relative humidity: 90% (max., non-condensing)
• Place of installation: cabinet
• Mounting position: vertical (horizontal rail position)

Electromagnetic compatibility (EMC) accordance with the standard EN 61326-1

• Noise emission: Group 1, Class B
• Immunity: industrial area
• ESD: 4 kV/8 kV surface / air
• BURST: 2 kV/1 kV power / signal
• SURGE: 1 kV
• Conducted RF immunity: 3 Veff

General data:

• Housing: TS-35 rail mounting housing material: polyamide PA6.6
• Connection: Pluggable screw-terminal
• Connecting cable: 0,25-2,5 mm2
• Dimensions / Weight: 12,5 × 99 × 115 mm (width × height × depth) / 0,15 kg
• Protection: IP20

Detailed information see in operating instructions. The Manufacturer maintans the right to change the technical data!