1
MTC-04-NTT Thermostat User Manual
Thank you for using Megmeet MTC-04-NTT module. Before using the
PLC product, please carefully read this booklet so as to better
understand it, fully use it, and ensure safety.This user manual is to offer
you a quick guide to the design, installation, connection and
maintenance of MTC-04-NTT module, convenient for on-site reference.
Briefly introduced in this booklet are the hardware specs, features, and
usage of MTC-04-NTT
modu
le, plus the optional parts and FAQ for
your reference.
This manual MTC-04-NTT module for the following members:
MTC-04-NTT Thermostat User Manual
Version
1.0
Revision date
July 16, 2012
BOM
1.Introduction
Model description as 1-1.
Output Method
R: Relay Output
T: Transistor Output
Input method
N: No CT (Current test)
Input
The same input and
output
channels
of
channel number and
module number
Thermostat
Megmeet
TT
M TC 04
-
-
N
Table 1-1 Module Description
2.Wiring Instructions
User input wiring terminals shown in figure 2-1.
Table 2-1 MTC-04-NTT enter the user terminal wiring diagram
Figure
①
~
⑦
wiring must be noted that seven aspects:
①
The thermocouple (thermal resistance) signal is recommended to be
accessed via a shielded cable (connection cable). Cables should be
kept away from power lines or other wires that may cause
electromagnetic interference. It is recommended to use cables less
than 100 meters in length (connecting cables). There is impedance in
the cable (connecting cable), which will introduce measurement error.
Characteristic adjustment can solve this problem. For specific operation,
please refer to "
MTC-04-NTT
thermostat user manual".
②
Thermal resistance (type Pt100, JPt100, Cu100, Cu50)
required the three-wire connection.
③
If there is too much electrical interference, the shield wire
(thermocouple compensationcable shielding terminal, thermal
resistance of the connecting cable shielding terminal 485 linescreen)
should be connected to ground terminal PG.
④
The thermostat grounding PG should be good grounding.
⑤
24V power supply can use the main output of 24Vdc auxiliary power
supply module, you can also use the other to meet the
requirements of power.
⑥
3.2 user basis having the output performance indicators to select
the appropriate power supply and solid state relays
⑦
4 external input support source input and sink input, input voltage
range DC18V ~ DC28V.
3.Instructions
3.1 Power indicator
The power indicator of MTC-04-NTT is shown in figure 3-1.
Table 3-1 Power indicator
Project
Instruction
Power
24Vdc (-15%
～
20%), the maximum allowable ripple
voltage 5%, maximum power consumption 160mA.
3.2 Performance indicators
Table 3-2 Performance indicators
Project
Indicators
Input signal
Thermocouple
type
K
、
J
、
E
、
N
、
T
、
R
、
S
、
B
（
Applicable
to each channel
）
Thermal
resistant type
Pt100
、
Cu100
、
JPt100
、
Cu50
、
Ni120
（
Applicable to each channel
）
Output
method
The output
gate open
transistor
Power supply voltage circuit
：
5V
～
24V
；
The biggest power supply voltage
circuit
：
30V
；
Loop current
：
0.3A/24Vdc
；
leakage current when open
：＜
0.1mA/30Vdc
；
Minimum load
：
5mA
（
5Vdc
～
24Vdc
）
Delay output
≤
DC30V or
≤
AC250V; Current
≤
2A
Input port Input method
Support source input and sink input
Voltage range DC18V~DC28V
Sampling period
100 milliseconds or 1 second (optional)
Control cycle
0.1~2seconds or 1
～
100 seconds
，
The
default value for 0.2s or 2s
Control method
ON/OFF control
，
Hand control
，
PID
control.Heating and cooling PID
control
①
Nominal
Temperat
ure Rang
e
Type K
－
100
℃
～
1200
℃
（－
148
℉
～
2192
℉
）
Type J
－
100
℃
～
600
℃
（－
148
℉
～
1112
℉
）
Type E
－
100
℃
～
850
℃
（－
148
℉
～
1562
℉
）
Type N
－
100
℃
～
1200
℃
（－
148
℉
～
2192
℉
）
Type T
－
200
℃
～
300
℃
（－
328
℉
～
572
℉
）
Type R
0
℃
～
1600
℃
（
32
℉
～
2912
℉
）
Type S
0
℃
～
1600
℃
（
32
℉
～
2912
℉
）
Type B
400
℃
～
1800
℃
（
752
℉
～
3272
℉
）
Pt100
－
150
℃
～
600
℃
（－
238
℉
～
1112
℉
）
JPt100
－
150
℃
～
500
℃
（－
238
℉
～
932
℉
）
Cu100
－
30
℃
～
120
℃
（－
22
℉
～
248
℉
）
Cu50
－
30
℃
～
120
℃
（－
22
℉
～
248
℉
）
Ni120
－
80.0
℃
～
280.0
℃
（－
112.0
℉
～
536.0
℉
）
