Led Indicators - Measurement Computing TC-32 User Manual

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TC-32 User's Guide
Each available alarm mode and setting is explained below.
Alarm input modes
Set independent temperature thresholds T1 and T2
for each alarm.
Alarm error modes
Alarm output modes
The TC-32 provides three alarm indicators –the
optionally, the user-configurable digital outputs associated with each channel.
Because the digital alarm outputs are user-configurable, they can be used to supply additional information
(visually, if the digital outputs are used to drive LEDs), such as the channel associated with the alarm condition
or differentiating between threshold and CMV alarms.
Pull-up configuration
By default, pull-up is enabled for all eight digital inputs and all 32 digital outputs. Slide switches on the rear of
the housing can disable pull-up for each digital input bit and digital output bit.

LED indicators

The TC-32 has four LEDs that indicate the power, communication, alarm, and open TC status
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POWER LED
The POWER LED turns on when you plug the power adapter into the TC-32. If a Flash LED command is sent
from an application, the
ACTIVITY LED
The LED turns on when there is a valid connection (USB or Ethernet) and blinks when a command is
ACTIVITY
sent to the TC-32.
ALARM LED
The ALARM LED turns on when an alarm condition occurs.
OPEN TC LED
The LED turns on when there is an open thermocouple condition.
OPEN TC
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Both the POWER and ACTIVITY LEDs blink in firmware upgrade mode. Refer to
Power LED blinks five times.
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Trigger alarm when input temperature ≥ T1; reset alarm when

input temperature < T2
Trigger alarm when input temperature ≤ T1; reset alarm when

input temperature > T2
Trigger alarm when input temperature is < T1 or > T2

Alarm on temperature reading only

Alarm on temperature reading, open thermocouple, or common-

mode voltage error
Alarm on open thermocouple or common-mode voltage error only

Alarm disabled; digital output line can be used for normal

operation
Alarm enabled; active low output (output line goes low when

alarm condition is met)
Alarm enabled; active high output (output line goes high when

alarm condition is met)
Alarm output may be latched and will not clear unless explicitly

cleared by the user
ALARM LED, the OPEN TC LED
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(603) 746-5524
Functional Details
on the front panel and,
Updating firmware on page 10.