Inputs And Outputs - Haydon IDEA Hardware Manual

Note: If a drive has been password protected and the password has been lost,
there are two options. The first is to send the drive back to Haydon Kerk Motion
Solutions, where the password can be recovered for a fee. The second option is
to use the "Restore Factory Defaults" option under the "Drive Commands" menu.
This will remove the password protection, but all programs on the drive will also
be lost.

Inputs and Outputs

The IDEA drive has four optically isolated inputs and four optically isolated open-
collector outputs. The voltage range for these is 5-24VDC. As the outputs are
open-collector, they will need a pull-up resistor tied to the Opto-supply. The
outputs are capable of sinking up to 200mA each.
Note: When an input is not connected to anything, it is seen as logic high. This
allows connecting two IDEA drives without the use of pull-up resistors.
Note: The inputs can be used in two ways. They can be connected to logic levels
that swing between opto ground and opto supply, or they can be attached to a
switch connected to opto ground. In the second configuration, when the switch is
open, the drive will see this as a logic high, when the switch is closed, and the
input is connected to opto ground, the drive will see this as a logic low.
Note: When an input is connected to a mechanical switch or relay, a
phenomenon called "bounce" can occur. When the switch contact is almost
closed, several electrical arcs can form. If an input is being used as an interrupt,
each arc will be seen as a rising and falling edge, causing several false interrupts
to trigger. Any input being used as an interrupt source should only be attached to
solid state devices or a switch with de-bounce circuitry.
In many cases, it is desirable to test a program that uses the inputs and outputs
without actually connecting the hardware. In the bottom right hand corner of the
user interface, there are eight circles, each representing one of the I/O. These
25