Micromod MOD: 30ML Installation - Manual (Page 48)

MOD 30ML Multiloop Controller
POWER, GROUNDING, AND BUILT-IN I/O CONNECTIONS
3.5.1 Built-In Voltage, Millivolt and Thermocouple Inputs
Make volt, millivolt and thermocouple input connections as shown in Figure 3.3. Always
connect the first thermocouple input to the I/O 1 terminals to enable automatic cold junction
compensation for all thermocouple inputs.
Figure 3-3. Built-in Voltage, Millivolt and Thermocouple Input Connections
Volt input specifications are:
Input Range: –10 mV to +6 Vdc
Input Impedance: 10M ohms minimum
Resolution: less than 50 microvolts
Accuracy: 0.05% of input or 100 microvolts, whichever is greater
Temperature Effect: 0.01% per °C or 10 microvolts per °C, whichever is greater
Burnout Detection: Reading goes downscale when any lead opens.
Millivolt and Thermocouple input specifications are:
Input Range: –10 to 120 mVdc
Temperature range limits for thermocouple inputs: See Table 4-1
Input Impedance: 10M ohms minimum
Resolution: less than 1 microvolt
Accuracy: 0.08% of input or 20 microvolts, whichever is greater
Temperature Effect: 0.01% per °C or 1 microvolt per °C, whichever is greater
Burnout Detection: Configurable for thermocouple inputs and millivolt signals which
represent thermocouple inputs. Choices are upscale or downscale
excursion of reading when any lead opens, or no detection.
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