7. Operation
7.3. Transmitter Channel Configuration
Revision 1 SmartLine Wireless Temperature and Universal I/O User's Manual 51
Cold Junction
The Cold Junction values is available for Thermocouple channels only and it is shown in the
Channel ->Sensor menu. The value is also available for monitoring over the OPC interface.
CJ value is updated at a lower rate than the normal PV publish rate.
Digital Inputs
The discrete input channels support voltage-free floating contacts. Default ON contact resistance
is 200 ohms. Default OFF contact resistance is 300 ohms.
Digital Input limits for the ON/OFF status are configurable in the Channel -
>Digital Input menu. The ON threshold resistnace shold be lower than the
OFF threshold value by at least 100 ohms to allow a hysteresis region. When
Digital input resistance is in the hysteresis zone, the LCD and the WDM
interface will indicate a “U”- uncertain status for the measured value and will
maintain the latest value until the value passes the hysteresis zone limit.
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