AC / DC "CT" STYLE RS485 MODBUS SERIAL OUTPUT CURRENT TRANSMITTER

The QI-50-V-485 and QI-300-V-485 are moulded case high accuracy universal DC or AC current transducers / transformers galvanically isolated from the measuring circuit. The “CT’s” are available as a 0-50 Amp fixed range unit, or a switchable, via dip-switch primary current range of either 0-150 Amps or 0-300 Amps and is equipped with both a 0-10VDC dampened output and RS485 MODBUS serial communications.

Also via the dip-switches you can select the CT for uni-polar measurement, or on a DC system bi-polar measurement is also an option (0-5-10VDC output), rather than a -10 to 0 to +10VDC output. The dip-switches also configure the Baudrate, the MODBUS address up to a maximum of 15 addresses.

Via the serial port and free software the span, zero and the MODBUS registers are easily configurable. With respect to the span and zero this can be configured freely within the primary current range and output scale. For example you could configure a 95 Amp to 175 Amp primary range with a 2.5-7.0VDC output.

The “CT” requires a supply voltage 12 to 30VDC and has an internal aperture size of 33mm Dia.

The principle of putting in primary turns on CT’s to further reduce the primary scale also applies to these current transformers.

Supply voltage: 12 to 30VDC

Power consumption: Max 20mA

Accuracy: Class 0.5

Resolution: 12 bit

Temp coefficient: <200 ppm/ C

Operating temp: -15 to +65 C

Humidity: 10-90 %RH non condensing

Outputs: 0-10VDC RS485 MODBUS serial

Response time:
1 Sec on 0-10VDC output
30mSec on MODBUS output

Measurement:
0-50 Amps AC/DC
0-300 Amps AC TRMS 20-2000Hz (mono-polar)
0-300 Amps DC (bi-polar)

Isolation: 3KV on an uninsulated conductor

Overload:
1KA continuous
2KA pulse

Indication:
Via yellow LED
Supply voltage connected - fixed illumination
Data communicating – flashing

Dip switch: 8 way

Terminals: 5 way removable plug

Mounting: Screw or Din rail (via included clips)

P/No’s.

QI-50-V-485
QI-300-V-485