The Pulse Input Connector - ADInstruments NIBP ML125 Series Owner's Manual

The Pulse Input Connector

This connector has provision for two types of analog input: a differential
high-gain signal, or a single-ended low-gain signal. The differential input is
used for small signals typically obtained from pulse transducers connected to
rats and mice. The single-ended low gain input can be used for other pulse
transducers that provide a larger signal. The pin assignments for the Pulse
Input connector are shown in Figure A–2.
Figure A–2
Ground
The Pulse Input connector
pin assignments
Low gain input
High gain input +
3
4
2
6
5
1
High gain input –
Low gain ground
+ 5V
The Pulse Input connector provides a +5 V power supply (pin 6), which
supplies excitation to the transducer, if required.
For transducers that produce very low level signals, such as those used for rats
or mice, the high-gain differential inputs are used (pins 4 and 5). The output
signal from the transducer should not exceed 250 μV. The output of the
transducer should be connected between the high gain input + and high gain
input – pins. To minimise noise, pins 1 and 2 should be shorted together.
For high output pulse transducers (up to 500 mV) you should use the single-
ended low gain input (pins 1 and 2). If using this connection you should also
ensure that pins 3, 4 and 5 are shorted together.
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NIBP Controller Owner's Guide
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