Signal isolator DT1393

ATEXNAMURdigital output

Product features

• NAMUR / contact inputs
• Relay contact / transistor outputs
• 2 channel version
• Line fault detection
• Switch selectable mode of operation
• 3 kHz transmission frequency (transistor output)
• 19-29 VDC supply voltage
• TS-35 rail mounting, 12.5 mm width devices

Product description
The DT1393 Intrinsically Safe NAMUR / Contact Isolators enable a safe area load to be controlled by a proximity detector or switch located in a potentially explosive area of zone 0 or zone 1. The units galvanically isolate the input, the output and the power supply. The safe output may be relay contact or transistor. In the case of a transistor output the maximum signal transmission frequency is 3 kHz.
The device is made in 2-channel version. In all units a built-in phase-reverse control switch allows an alarm condition (output open) to be signalled for either state of the sensor. A line-fault detection opens the output in the event of short or open-circuit lines: intended for use primerily with proximity detectors. It can also be used with switches made to resemble them electrically by adding two resistors, or disabling by a switch if not required.
A version with an input current < 0.5 mA is also available for isolation of the output contact of gas-consumption meters.
The supply voltage range is 19-29 VDC, thus the isolators are insensitive to the supply voltage change.

Technical specifications
Safety data: The connection terminals of the supply voltages are isolated from each other, the isolation is in compliance with EN 61010-1, pollution level: 2, measurement category: II
Intrinsical safety data:

• Certification: BKI 14 ATEX 0012
• Protection marking: II (1) G [Ex ia Ga] IIC/IIB (-20 °C < Ta < +50 °C); II (1) D [Ex ia Da] IIIC (-20 °C < Ta < +50 °C)

Safety data: Um: 250 Veff
Input parameters:

• In compliance with the standard EN 60947-5-6 (NAMUR)
• No load voltage: 8.2 V
• Short circuit current: 8.2 mA
• Input resistance: 1000 ohm
• Low-current input version, upon request:
• No load voltage: 8.2 V
• Short circuit current: 0.5 mA (max.)
• Input resistance: 18 kohm

Output parameters:

• Contacts: SPST or SPDT contact, see the table on the previous page
• Contact rating: 250 VAC, 5 AAC / 30 VDC, 5 ADC
• Transistor output: galvanically isolated passive switching transistor
• Voltage: 30 VDC (max.)
• Current: 40 mA (max.)
• Frequency range: 0-3 kHz

Galvanic isolation:

• Operating isolation voltage: 250 Veff (between the input, the output, and the supply voltage terminals)
• Test voltage: 2500 VDC

Power supply:

• Supply voltage: 19-29 VDC
• Consumption: see the table on the previous page

Ambient conditions:

• Operating temperature range: -20 - +50 °C
• Relative humidity: 90% (max., non-condensing)
• Place of installation: safe area, cabinet
• Installation: vertical position

Electromagnetic compatibility (EMC) accordance with the standard EN 61326

• Immunity: industrial area
• Noise emission: Group 1, Class B

General data:

• Housing: terminal assembly box, rail mounting on TS-35 rail, material: polyamide PA6.6
• Connection: plug-in screw terminal
• Connection cable: 0.25-2.5 mm2
• Dimensions: see the table on the previous page
• Weight: 0.1-0.2 kg (depending on the type)
• Protection: IP 20

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