SCC301 is a dual purpose, current-to-current converter with 3-port isolation. It provides a fully floating, isolated DC supply for energising a conventional 2 or 3-wire 4~20mA transmitter/ smart transmitter and repeats the current in another isolated circuit or accepts a 4~20mA signal from a controller/source to drive loads up to 750 ohms. A 20~35VDC power supply is required for operation. The power supply terminations are at the top of the unit to enable this model to be used either as a repeater power supply or driver. For a 2-wire smart transmitter the unit also allows bi-directional transmission of digital communication signals superimposed on the 4~20mA signal so that the transmitter can be interrogated either from the operator station or by a handheld configurator.
Specification
Number of channels : One
Input and output signal
0~20 mA for normal operation
4~20 mA for operations with digital communication
Isolation (mutual, between 1500 VAC RMS power supply, input and output)
Power supply : 20~35 V DC
LED indicator : 1 red LED indicating POWER ON
Voltage available to 20 V minimum at 20 mA transmitter
Digital signal bandwidth : 100 Hz ~ 10 KHz
Maximum load resistance
Conventional transmitters/drivers :750 ohms
Smart transmitters : 220ohms to 650 ohms
Voltage drop across input <0.5V from current source (terminal 5 & 6)
Transfer accuracy at 25 °C ±0.1% of span (±20 micro Amps) (including non-linerarity and hysterisis)
Temperature effect on <1 micro Amps / °C accuracy
Response time 10 ms (to reach 90% of span)
Power requirement
135mA max at 20V with a (supplying a transmitter) 20mA signal
95mA max at 35 V with a 20mA signal
Power requirement
90mA max at 20V with a (current source input) 20mA signal
65mA max at 35 V with a 20mA signal
Common mode rejection ratio Better than 160dB
List of compatible devices for All HART compatible devices digital communication
Enclosure
Material ABS plastic
Dimensions 80(H) x 25(W) x 85(D) mm
Mounting : Snap on for 35 mm DIN rail to DIN 46277
Connection, single/stranded ≤ 2.5 mm², AWG 14 wires
Weight < 200 grams
Protection IP 20
Temperature, Humidity
Ambient, storage -40 ~ +80 °C
Ambient, operation -20 ~ +55 °C
Relative humidity 5 ~ 95%
See less
0~20 mA IN/OUT
HART compatible
1500VAC RMS galvanic isolation between supply, input & output
Accuracy : ±0.1% of span (±20 micro Amps)
Din rail mount, 25 mm wide enclosure
20~35 V DC supply
Giá: Liên hệ