Operation
28
6.6. TTL Connections
The Plethysmometer is provided with a D-sub (DA-15 Female) TTL I/O port.
This port could be used to synchronize some events with external instruments
or acquisition systems. TTL Output signals are electrical isolated to guarantee
galvanic isolation between the device and any other external device.
TTL signals are refereed to Power Ground (pin 14 and pin 15)
D-sub connector pins
DB-15 Pin# Signal Name
Signal Type
Description
1
Reserved
TTL OUT
Reserved
2
Reserved
TTL OUT
Reserved
3
Reserved
TTL OUT
Reserved
4
Reserved
TTL OUT
Reserved
5
Reserved
TTL OUT
Reserved
6
Reserved
TTL OUT
Reserved
7
Reserved
TTL OUT
Reserved
8
Reserved
ANALOG OUT
Reserved
9
Save measurement
TTL IN
Save measurement -> TTL High level
10
Reserved
TTL IN
Reserved
11
Reserved
TTL IN
Reserved
12
Reserved
TTL OUT
Reserved
13
Reserved
TTL OUT
Reserved
14
GND
POWER
Power Ground
15
GND
POWER
Power Ground
D-sub connector pin-out table
NOTE: TTL OUT is designed for connection with scientific instruments! DO NOT
CONNECT ANY POWER DEVICE!
NOTE: DO NOT SINK a current more then 10mA from each TTL pin! DAMAGE WILL
OCCURS.
Summary of Contents for 37240
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