ControlMaster CM30 and CM50
Universal process controllers,
1
/4 and
1
/2 DIN 7 Advanced Level
32 IM/CM/ED–EN Rev. B
7.3 Input/Output
Enables analog and digital inputs / outputs and relays to be configured.
Analog Inputs
Analog Input 1 (4)*
Input Type Millivolts, Milliamps, Volts, Resistance (Ohms), RTD, Thermocouple, Digital volt-free,
24V
Digital, Freq. Input, Pulse Input.
Additional Input Type comments:
Digital Volt Free
Acts as a digital input.
Freq. Input
Sets the maximum frequency and equivalent flow rate in the engineering range 0 to
6000 Hz. (A frequency of up to 6 KHz can be used to create an analog value.)
Pulse Input
This parameter counts pulses and is for use with electromagnetic flowmeters.
Elect. Low Sets the required electrical range.
Note. Applicable only to Millivolts, Milliamps, Volts and Ohms.
Linear Inputs Standard Analog Input Accuracy (% of Reading)
Millivolts 0 to 150 mV 0.1 % or ±20 µV
Milliamps 0 to 50 mA 0.2 % or ±4 µV
Volts 0 to 25 V 0.2 % or ±1 mV
Resistance (low) 0 to 550 0.2 % or ±0.1
Resistance (high) 0 to 10 k 0.1 % or ±0.5
Elect. High Sets the required electrical range.
Note. Applicable only to Millivolts, Milliamps, Volts and Freq. Input.
Linearizer Selects the linearizer type required to condition the input signal.
Notes. For thermocouple applications using an external fixed cold junction, set Input
Type to Millivolts and select the appropriate linearizer type.
Not applicable for Pulse Input, Digital volt-free, 24V Digital parameters.
Eng Units The selected units are used by the linearizer and displayed in the Operator pages.
Not applicable for: Pulse Input, Digital volt-free, 24V Digital parameters.
Thermocouple and RTD inputs are restricted to deg C, deg F, Kelvin – see Appendix A,
page 79 for analog input units.
Eng. Dps Engineering decimal places – selects the resolution required to be displayed for the
input value.
*Analog Inputs 2 to 4: Freq Input, Pulse Input and Resistance not available. A Thermocouple input type can be set only if the first input is set
to Thermocouple.
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Input/Output
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