Electrical specification
28
The 1902 transducer input is an 8-pin DIN
socket. Input is inherently differential; for
single-ended use, the inverting input is
grounded. The main amplifier offsetting
DAC is brought out, and may be used as a
simple programmable signal source when
the waveform conditioner is not required.
1 Ground Ground Ground
2 +12 V power +12 V power +12 V power
3 –12 V power –12 V power –12 V power
4 +5 V power +5 V power +5 V power
5 Input +ve Input Bridge output +ve
6 DAC output DAC output DAC output
7 Input –ve Link to pin 1 Bridge output –ve
8 No connection
Shell Mains earth Screen Screen
• A human subject must NOT be connected to this socket
• The power outputs are intended for driving transducers only.
Transducers should have impedances greater than 500 Ohms
(5 volt) or 1200 Ohms (12 volt)
• Transducer current should not exceed 10 mA
Transducer input
8-pin DIN socket
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