DESCRIPTION
The 6040 digital I/O module provides 16 digital inputs for event recording and 16 digital outputs for control. The 6040-1 version has TTL and CMOS logic levels while the 6040-2 version has optic isolated inputs and isolated relay outputs. The 6040 may be programmed to automatically respond to the alarms generated by system input modules with preprogrammed digital outputs for the control of external equipment.
The 6040 is used to monitor critical events that are recorded with other data, and initiate programmed actions like start recording or emergency stop. The 6040-1 has non-isolated, TTL/CMOS compatible input and output levels. The 6040-2 has optic isolation, which assures that the DAS is isolated from large common mode voltages, ground loops, and transients that frequently occur in test installations. The output relays on the 6040-2 are single form C.
In normal operation, the digital inputs are captured coincident with the sampling of other DAS inputs. A "glitch capture" mode may be used to catch brief events, 100 nanoseconds or longer, that occur between sample periods. PI660 software includes screens for setting and reading digital I/O, monitoring of digital inputs for specific events, and programming digital output vectors in response to an alarm or input event. LEDs show the current status of inputs or outputs.
