IOtech MultiScan 1200, User Manual

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24 Chapter 2: TempScan/1100 & MultiScan/1200 TempScan / MultiScan User's Manual
DB50 Digital I/O Pin Descriptions
Line Pin Line Pin Line Pin Line Pin Line Pin
Output 1 1 Output 11 37 Output 21 24 Output 31 11 Ground 12
Output 2 34 Output 12 21 Output 22 8 Output 32 44 Ground 13
Output 3 18 Output 13 5 Output 23 41 Input 1 15 Ground 14
Output 4 2 Output 14 38 Output 24 25 Input 2 48 Ground 28
Output 5 35 Output 15 22 Output 25 9 Input 3 32 Ground 29
Output 6 19 Output 16 6 Output 26 42 Input 4 16 Ground 30
Output 7 3 Output 17 39 Output 27 26 Input 5 49 Ground 31
Output 8 36 Output 18 23 Output 28 10 Input 6 33 Ground 45
Output 9 20 Output 19 7 Output 29 43 Input 7 17 Ground 46
Output 10 4 Output 20 40 Output 30 27 Input 8 50 Ground 47
Each digital output line will drive five (5) standard TTL (transistor-transistor logic) loads. All digital
input lines are one-eighth (0.125) TTL loads. All inputs are protected against damage from high static
voltage. Normal precautions should be taken to limit the input voltages to the range of 0.0 to 5.3 volts.
All digital I/O lines are referenced to digital ground.
CAUTION CAUTION CAUTION CAUTION
Do not exceed the levels described. Otherwise, the TempScan/1100 or
MultiScan/1200 unit may be damaged in a way that is not covered by the
warranty.
TTL Output & Trigger Input Configuration
The rear panel of the TempScan/1100 or MultiScan/1200 unit also provides two external BNC
connectors: The TTL output and the trigger input. The BNC TTL scan output is used for
synchronizing equipment with TempScan/1100 or MultiScan/1200 acquisition, while the BNC trigger
input is used for starting and/or stopping acquisition of the TTL output. This trigger input can be
programmed to activate on a rising (positive-going) or falling (negative-going) TTL level edge. Any
TTL level signal (> 2.2V = Hi, < 0.8V = Lo) may be used as a trigger pulse. A trigger pulse may also
be used to generate a Service Request. Note that the TTL Out is a LS-TTL compatible output, 0.4 mA
sourcing, 8 mA sinking. When a scan is logged into the acquisition buffer(after the actual scan), the
TTL output signal is pulsed for 100 ms. Refer to the timing diagram.