# Modus Model T20 ```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.
```