OM-USB-5203 User's Guide
Specifications
26
Temperature alarms
Table 11. 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 12. 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 13. Microcontroller specifications
Parameter
Specification
Type
Two high performance 8-bit RISC microcontrollers
