THUNDERBIRD INTERNATIONAL CORPORATION 4027 FREQUENCY TO CURRENT CONVERTER MAG TYPE CURRENT OUTPUT PRODUCT DESCRIPTION The FTC converter receives frequency input and converts to a proportional 4-20mA output. It has been configured to fit a compact 21 and 34" NPT "ELBY" explosion proof enclosure. The frequency range is field selectable to fit most applications. ZERO and SPAN adjustments make it easy to calibrate to almost any measurement range, with little interaction between the adjustments. The power supply input is designed to cover the entire range of commonly available DC power, with no selecting or adjusting. SPECIFICATIONS Supply Voltage Vs: Output Signal: Input Protection: Output Protection: Short to + VDC, Common or Signal Out continuous Frequency Input Range: Fmin: 0 Hz yields 4 mA signal Fmax: 10 kHz yields 20 mA signal (two adjustable ranges, see P/N table below) [up to ~18 kHz @ 1% linearity with > 50mV signal] Input Sensitivity: Standard: 50 mVpp High: 12 mVpp or 5 mVpp Output Settling Time: Full scale change to 95% of final value 100msec to 350 msec. Output Ripple and Noise: 2 mA max. p-p (1% of Full Scale) .02 mA typical (0.01% of Full Scale) Temperature Coefficient: Temp. Range: ZERO/SPAN Adjustment: 3 Wire Output Version: 0.07 mA (only when wired via Current Mode 2) 24.1 mA (Full scale Min. Cal., Zero Cal. set to 4 mA) Wiring Options: PART NUMBERS Frequency to Current Converters: P/N Input Fmax adjustment Sensitivity LO Freq. Range 4027-00: 5 mVpp 75-1100 Hz 4027-10: 12 mVpp 75-1100 Hz 4027-11: 12 mVpp 50-550 Hz 4027-12: 12 mVpp 75-2000 Hz 4027-50: 50 mVpp 75-1100 Hz 4027-Axx: Fmax adjustment HI Freq. Range 1100 Hz to 10 kHz 1100 Hz to 10 kHz None 2000 Hz to 20 kHz 1100 Hz to 10 kHz Optional housing will fit GUAL-16 or similar Frequency to Voltage Converters: Refer to 4026 or 4028 Explosion Proof Junction Box: 90012-001 ELBY (1/2-14 NPT) Other Junction Boxes & Adapters: Refer to Bulle

4027 FTC CONVERTER: WIRING OPTIONS CURRENT MODE 1 (2 wire) JUMPER WIRE FOR 2 -WIRE CURRENT MODE CURRENT MODE 2 (3 wire) VOLTAGE MODE 1 (3 wire) FOR USE WITH LONG WIRE RUNS RESISTANT TO LINE LOSSES & EMI DIGITAL PICKUP MODE (WITH NPN SIGNAL) 3 wire voltage or current mode NOTE: USE ONLY WITH... 4027-00 4027-10 4027-50 (FOR PNP OR OTHER SIGNAL TYPES, PLEASE CONTACT SPECTEC) ATTENTION: OPEN COLLECTOR OUTPUT SIGNAL TYPES REQUIRE A 2.2 kΩ RESISTOR TO BE ADDED BETWEEN TERMINALS 1 &