Setra System Model Datum 2000 - Manual (Page 4)

4
CONNECTING A TRANSDUCER TO THE DATUM 2000™
Note: If you purchased your DATUM 2000™ factory calibrated with a Setra
pressure transducer or transmitter, a 10 foot cable/connector assembly has
been provided. Therefore, this section may not be applicable. Go to page 7.
The DATUM 2000™ has two groups of input terminals, one for each channel.
Figure B (page 6) shows the terminal block connector on the back of the
DATUM 2000™ and describes each position of the connector. Figure A
shows a typical setup of a DATUM 2000™ with a single transducer.
The DATUM 2000™ provides ground referenced 12 volt and 24 volt excita-
tion. The 24 volt excitation is available on pins 5 and 11. The 12 volt excita-
tion is available only on pin 10. (If two 12 volt transducers [transmitters] are
being used, both units must be connected to pin 10.) DO NOT USE THE
EXCITATION FROM THE METER TO POWER ANY OTHER DEVICE
BESIDES THE 1 OR 2 TRANSDUCERS OR TRANSMITTERS THAT THE
METER IS DISPLAYING. UNDER NO CIRCUMSTANCES SHOULD MORE
THAN 60 mA BE DRAWN FROM THE DATUM.
Setra transducers come in two configurations: 3 wire (3 terminal) circuits and
four terminal equivalent circuits. The Setra transmitters are known as 2 wire
circuits. The instructions for connecting each of these to the DATUM 2000™
follows:
TRANSMITTERS ( 2 WIRE DEVICES)
Connect the + excitation to pin 5 (CH2: pin 11) to supply 24 volts to the
transmitter.
Connect the - excitation to pin 8 (CH2: pin 14) to return the signal to the
DATUM 2000™.
TRANSDUCERS ( 3 WIRE OR 3 TERMINAL DEVICES)
Connect the + excitation to pin 5 (CH2: pin 11) to supply 24 volts to the
transducer. IF YOUR TRANSDUCER REQUIRES 12 VOLT EXCITATION,
CONNECT THE + EXCITATION TO PIN 10 (CH2: PIN 10).
Connect the - excitation to Ground, pin 9 (CH2: pin 15).
Connect the + output to +IN, pin 6* (CH2: pin 12).
Connect the -IN terminal, pin 7* (CH2: pin 13) to Ground, pin 9 (CH2: pin 15).
Connect the shield to Ground, pin 9 (CH2: pin 15).