ControlMaster CM10, CM30 and CM50
Universal process controllers,
1
/8,
1
/4 and
1
/2 DIN 4 Installation
18 IM/CM/S–EN Rev. R
4.5.4 Analog Inputs
Fig. 4.10 Standard Analog Inputs (1 and 2)
mA
mV
V
Digital Input
Milliamps*
THC
CJ**
THC***
3-lead RTD
mA, mV, V,
Digital Input
2-lead RTD
+ Resistance
RTD +
RTD –
RTD +
RTD –
Transm itter PSU
Analog
Input 2
Analog
Input 1
Milliamps*
RTD –
3rd lead
CJ
Sensor
* Using internal transmitter power supply.
** Fit the CJ sensor supplied if Analog Input 1 or 2 are THC inputs.
(Alternatively, it is possible to use an external fixed cold [reference] junction, if the controller
is programmed for use with millivolt inputs and the appropriate thermocouple linearizer is selected.)
*** Analog Input 2 can be used only with THC inputs if Analog Input 1 is also used as a THC input.
**** For mA input types, to ensure loop continuity when the controller is switched off, fit a 2V7 Zener diode as shown.
Note. 3-lead RTD: 3 leads must have equal resistance, not exceeding 20 each.
****
****
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