Hardware manual

Appendix A - Reference Information
32 Version 1.6.0.0 March 15, 2010
S o me t ext t o f orc e a pa g e br ea k in W ord but re ma in invis ibl e
GPIO overview
NION and CAB products include a versatile GPIO (General Purpose Input Output) system at
the rear for terminating external logic, controls, relays and other external systems. Each
control pin is supported by NWare for configuration, control and monitoring. Any
combination of control pins may be used simultaneously, regardless of the configuration.
Caution: The pin assignments for the GPIO ports on the NION and CAB devices are not the
same. Please be sure to check the documentation carefully when connecting devices to the
ports.
Configurable general purpose ports (8 control pins)
These ports represent the bulk of the GPIO functionality. Each of these ports can be
configured as follows:
Digital Output 3.0V TTL logic - Low: 0VDC - 0.4VDC;
High: 2.4VDC - 3.3VDC
Digital Input 3.0V TTL logic - Low: 0VDC - 0.8VDC;
High: 2.0VDC - 24VDC
Analog Input Using external, regulated 24VDC supply.
Rotary encoder Requires 2 pins and a common.
NC and NO relays (4 sets)
Four Form C relays are available for general purpose usage. These are user configurable
from within NWare.
Fault relay
A single system relay is configured for supervising project faults. This Form C relay
provides 1A contacts and is activated when the front panel fault LED is illuminated, which
indicates a muted condition.
The behavior of the fault relay is summarized below.
Event Fault relay action taken
Power off Pin 25 is connected to pin 12
Power on Pin 25 is connected to pin 13
Unit (NION) or System muted Pin 25 is connected to pin 13
Project halted Pin 25 is connected to pin 13
Project erased/no Project Pin 25 is connected to pin 13