Modus Model T20 MODEL T20 AC Power Input/Voltage Output SPECIFICATIONS Electrical Transformer isolation between power supply and output is 2500 Vrms Output voltage: 0 to 5 Volts, or 0 to 10 Volts Sink or source 3.5mA Protected against short circuit Terminals 1 and 2 are AC power input. Terminals 3 and 4 are DC voltage output. ORDERING INFORMATION Order Number (See Table below and Reference Table T20 - PPP - S - V - O Example: T20 - 07P - C - X - B PPP = Pressure Range See Reference Table A S = Supply Voltage C = 24 Vac D = 120 Vac A) V = Voltage Output 5 = 0 to 5 Volts X = 0 to 10 Volts E = 240 Vac O = Offset (See Note 1) - = No offset A = 1/4 offset B = 1/2 offset Note 1 If the measured differential pressure is expected to go from positive to negative, a transmitter with offset (elevated zero) should be ordered. Three options are available: "-" No offset. At zero differential pressure the output signal is: 4mA (4 to 20mA range) 0V (0 to 5V range) 0V (0 to 10V range) Pressure excursion: 0% to + 100% of Range, see Table A "A" 1/4 span offset. At zero differential pressure the output signal is: 8mA (4 to 20mA range) 1.25V (0 to 5V range) 2.5V (0 to 10V range) Pressure excursion: -33% to +100% of Range, see Table A "B" 1/2 span offset. At zero differential pressure the output signal is: 12mA (4 to 20mA range) 2.5V (0 to 5V range) 5V (0 to 10V range) Pressure excursion: -100% to +100% of Range see Table A To order: determine the positive pressure range; from the required offset (none, A, or B). Table A find the corresponding pressure code, then add For example, T30 05E A is a transmitter with a maximum range of 1" of H2O at 20mA and a minimum range of 0.33" of H2O at 4mA.
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