Analog Inputs - ABB ControlMaster CM15 User Manual

ControlMaster CM15
Universal process indicator

4.5.1 Analog Inputs

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 suitably rated diode
(for example, type 1N4148 or equivalent) as shown.
. 3-lead RTD: 3 leads must have equal resistance, not exceeding 20  each.
Note
Fig. 4.8 Standard Analog Inputs (1 and 2)
14
1
/ DIN
8
THC
1
3rd lead
+
2
–
CJ**
3
+
4
mA
mV
V
5
–
3-lead RTD 2-lead RTD
RTD –
RTD + RTD +
RTD – RTD –
THC***
****
+ +
Milliamps*
mA
mV
****
V
–
Milliamps*
+
IM/CM/I–EN Rev. D
4 Installation
–
Tx
+
–
Tx
+
CJ
Sensor