Measurement Computing USB-5201 - Manual (Page 21)

USB-5201 User's Guide Specifications
21
Temperature alarms
Table 6. Temperature alarm specifications
Parameter Specification
Number of alarms 8 (one per digital I/O line)
Alarm functionality Each alarm controls its associated digital I/O line as an alarm output. The input to each alarm
may be any of the analog temperature input channels. When an alarm is enabled, its
associated I/O line is set to output (after the device is reset) and driven to the appropriate state
determined by the alarm options and input temperature. The alarm configurations are stored
in non-volatile memory and are loaded at power on. Alarms function both in data logging
mode and while attached to USB.
Alarm input modes  Alarm when input temperature > T1
 Alarm when input temperature > T1, reset alarm when input temperature goes below T2
 Alarm when input temperature < T1
 Alarm when input temperature < T1, reset alarm when input temperature goes above T2
 Alarm when input temperature is < T1 or > T2
T1 and T2 may be independently set for each alarm.
Alarm output modes  Disabled, digital I/O line may be used for normal operation
 Enabled, active high output (digital I/O line goes high when alarm conditions met)
 Enabled, active low output (digital I/O line goes low when alarm conditions met)
Alarm update rate 1 second
Memory
Table 7. Memory specifications
Parameter Specification
EEPROM 1,024 bytes isolated micro reserved for sensor configuration
256 bytes USB micro for external application use
256 bytes USB micro reserved for data logging configuration
Microcontroller
Table 8. Microcontroller specifications
Parameter Specification
Type Two high performance 8-bit RISC microcontrollers