Analog Inputs - Cm15 Indicator - ABB ControlMaster CM15 User Manual

ControlMaster CM15 and CMF160
Universal process indicator
4.5.3 Analog Inputs – CM15 Indicator
Analog
Input 1
Analog
Input 2
Transmitter PSU
* 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 indicator is switched off, fit a 2V7 Zener diode
as shown.
3-lead RTD: 3 leads must have equal resistance, not exceeding 20  each.
Note.
Fig. 4.16 Standard Analog Inputs (1 and 2) – CM15 Indicator
24
1
/ DIN
8
3-lead RTD
THC
3rd lead
RTD +
CJ**
RTD –
mA, mV, V, ****
Digital Input
2-lead RTD +
Resistance
RTD –
mA
RTD +
mV
V
Digital Input
RTD –
THC***
4 Installation
Milliamps*
****
Milliamps*
CJ
Sensor
IM/CM/I–EN Rev. P