User Manual For - CONTROLLER/DATA RECORDER MultiCon CMC-99/141
7.8.11.3. Application of Logical channel in the Hardware input mode for RT4 modules
See also:
Appendices
8.7. RT4 , RT6 – RTD MEASUREMENT MODULES
Task:
The MultiCon with built-in
RT4
module can measure simultaneously temperature at four
points. Suppose you want to monitor the temperature in the office, warehouse, basement and
corridor. To monitor the temperature in the first two channels, we will use the PT1000 sensors
and connections 3-wire, and for the rest of PT100 and connections 2 and 4-wire. We want to
read the temperature from 4 sensors in one window in vertical bars mode. In addition, we
want to log temperature every 1 minute (for more details about logging see Chapter
7.14.2 Groups - Logging options
Solution:
Before measuring temperature, user should configure the device, and then connect the
Fig. 7.65. Schematic diagram for the RT4 module
In first step you need to configure
Logical channels
.
To read the temperature from sensor 1 (Bathroom):
–
touch screen and press the
Menu
button,
–
press the
Device configuration
button,
–
enter the
Logical channels
menu,
–
using the arrows in the top navigation bar, select any
logical channel
such as 30,
–
in
Name
parameter write
Bathroom
,
–
Mode
parameter set as
Hardware input
,
–
Source
parameter set as
Inp. B1: RTD
–
enter
Source configuration
submenu:
•
Mode
parameter set as
Pt1000 3-wire
,
•
in
Low Limit
parameter write
-100°C
,
•
in
High Limit
parameter write
600°C
,
121
Power supply
(depending on version)
1
2
8
5
6
7
3
4
SERVICE
+24V DC ±5%
(
I
max. = 200mA)
digital input
0/15..24V DC
RS-485
GND
GND
A+
B-
isolated
Office
Warehouse
Basement
Corridor
Slot B
Inp.B1 : RTD
Inp.B2 : RTD
Inp.B3 : RTD
Inp.B4 : RTD
RT4
4 RTD input
I
N
4
n01
n02
n03
n04
n05
n06
n07
n08
n09
n10
n12
n13
n14
n15
n16
n11
I
N
1
I
N
2
I
N
3