A combination package, which is designed to provide 10-35 VDC loop powered 4-20 madc isolation, as well as industrial surge suppression in a single package. Current loop isolation is provided by galvanometricbased technology. The isolator provides 1500 VRMS of instantaneous isolation. Accuracy of ±0.1%, with linearity better than 0.1%. Adds 15 ohms ± 10% to the control loop. The surge suppression portions of the circuit is designed to protect sensitive process control equipment and instrumentation from proximity lightning strikes and other surge sources. The multi-stage design utilizes gas ionization-based technology as a primary protection stage. A secondary stage incorporates a high-speed transient voltage suppression (TVS) circuit. The final stage employs ultra-fast thermal-based circuit breakers with an auto-reset capability. This final stage, not only supports the primary and secondary stages of protection, but will also provide equipment protection from mis-wiring or equipment failure that may introduce high voltage onto the control loop.
ISOLATOR
Isolation Type: Galvanometric based
Isolation: Instantaneous, 1500 VRMS
Power: 10-35 VDC
Accuracy: ± 0.1%
Linearity: ± 0.01%
Repeatability: ± 0.02%
Impedance: + 15 ohms ± 10.0%
Operating Temp.: -40°F (-40°C) to 194°F (90°C)
Operating Humidity: 0-99% (non-condensing)
SURGE PROTECTION
Type: Multistage
Primary Stage: Gas ionization, crowbar action
Maximum Current: 20,000 amps\460 joules
Response Time: 1μs\100 volt rise
Surge Life min.: 400 shots at max. current
Secondary Stage: Transient Voltage Suppressor
TVS bidirectional
Maximum Current: 70 amps
Response Time: <1ns
Clamping Voltage: 36 volts
Surge Life: Unlimited
