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Action Instruments G428 Thermocouple Input, Field Configurable Isolator

Thermocouple Input, Field Configurable Isolator

The G428 is a DIN rail mount, thermocouple input signal conditioner with 1800VDC isolation between input, output and power. The field configurable input and output offer flexible, wide ranging capability for J, K, T, R, S, E and B type thermocouples.

The input of the G428 can be configured for over 60 different thermocouple temperature ranges. The output is linear to temperature and can be set for either 0-5V, 0-10V, 0-1mA, 0- 20mA or 4-20mA.

For an RTD and thermocouple input temperature transmitter with improved accuracy and stability, see Action I/Q model Q488. PC or DIP switch programmable. Wide ranging, precision zero and span pots allow 50% adjustablity of offset and span turn-down within each of the ranges. For example, the 0-1000°C range could be offset and turned down to provide a 4- 20mA signal representing 500-1000°C. Similarly, adjustment can be referenced to the output range. The example from above could be used to provide a 12-20mA signal from a 750 to 1000°C temperature input.

● Easy Field Configurable Input Ranges for J, K, T, R, S, E, and B Type Thermocouples
● Eliminates Ground Loops with 1800VDC Input-to-Output Isolation
● ASIC Technology
● Five Field Configurable Output Ranges: 0-5V, 0-10V, 0-1mA, 0-20mA and 4-20mA
● ASIC Technology for High Reliability

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Cat #Descriptions
G428-0001Thermocouple input, Field Configurable Isolator
Inputs: Sensor Types: J, K, T, R, S, E, B
Impedance: >1MW
Bias Current (burnout detection): <1.5microamp
Overvoltage: ±10V differential
Common Mode (Input to Ground): 1800VDC, max.
Zero and Span Adjustability: 50% of any selected range
Output (Voltage Output): Output:0-5V, 0-10V
Source Impedance: <10W
Drive: 10mA, max.
Output (Current Output):
Output: 0-1mA, 0-20mA, 4-20mA
Source Impedance: >100KW
Compliance: 0-1mA; 7.5V, max.(7.5KW)
Temperature Range: Operating: 0 to 55°C (32 to 131°F)
Storage: -25 to 70°C (-13 to 158°F)
0-20mA; 12V, max.(600W)
4-20mA; 12V, max.(600W)
Power: Consumption: 1.5W typical, 2.5W max.
Range: 9 to 30VDC
Terminations and Wire: Screw terminals for 12-22 AWG.
Use twisted pair for output and power connections
Stability: +0.04% of the maximum full scale range per ºC change in ambient temperature, maximum
Response Time (10 to 90%): 500mSec., typical
Common Mode Rejection: DC to 60Hz: 120dB
Isolation: 1800VDC between input, output and power
EMC Compliance (CE Mark): Emissions: EN50081-1
Immunity: EN50082-2
Safety: EN50178
Weight: 0.54 lbs
Agency Approvals: CSA certified per standard C22.2, No. 0-M91 and 142-M1987 (File No. LR42272)
UL recognized per standard UL508 (File No.E99775)
CE Conformance per EMC directive 89/336/EEC and Low Voltage 73/23/EEC

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