Specifications

Synergy Nano Technical Manual, Revision -
Page 225
11.4 Digital Inputs
Digital Inputs
LEDs show status of the controllers 16 Digital
Inputs.
♦ Grey LED: Input Off
♦ Red LED: Input On
Description
Digital inputs are used to monitor on-off signals from outside devices such as test units or chamber
machinery. The Synergy Nano displays the on/off state of an input in the Digital Inputs window. Waitfor
steps can be programmed to wait for a digital input state to change before it continues the program.
The Digital Inputs are located on connectors P1 and P3 on the Olympic board. See Section 17.0
. Pin 1 on
P7 is ground. Pins 3 – 12 correspond to Digital Inputs 1 to 10. Digital Input 9 (Pin 11) is a TempGard Alarm
on chambers that have a TempGard alarm. If the chamber does not have a TempGard alarm, Input 9 must
be shorted to ground (pin 1). Use the Olympic Board Diagram in Section 17.0
as a reference guide.
Example Digital Input Application
To turn on a test device in the middle of a test, the test engineer wants to wait for the device to finish
powering up before continuing with the chamber program. To achieve this, he uses both Events and Digital
Inputs. First he uses Event 1 to drive the test unit power supply. Next he connects the power up complete
output signal from the unit under test to Digital Input 1.
When the program runs, it ramps to temperature and then activates Event 1 to start the power up sequence
for the test unit. The Waitfor step is programmed to wait for Digital Input 1 to turn on. The chamber program
holds its state until the power up sequence is complete and the signal from Digital Input 1 arrived. The
advantage of the Waitfor in this application is that it doesn’t matter how long the startup process takes, it
could take 1, 5 or 10 minutes or be different each time. At the point the signal comes in on Digital Input 1 the
chamber program can continue since the test unit is powered and running.