Megmeet MC100 Series User Manual

MC100-2TC/4TC Thermocouple
Module User Manual
Note:
To reduce the chance of accident, please carefully read the operating
instructions and safety precautions prior to use. Only adequately trained
personnel shall install or operate this product. In operation, strict compliance
with applicable safety rules in the industry, the operating instructions and
safety precautions in this book is required.
This manual MC100 series for the following members:
MC100-2TC Thermocouple Module
MC100-4TC Thermocouple Module
Version 1.0
Revision date January 15, 2010
BOM R29090040
1 Port Description
1.1 Port
The extension port and user port of MC100-2TC/4TC are both protected by a
cover, as shown in Figure 1-1. Removing the covers reveals the extension
port and user port, as shown in Figure 1-2.
R
E
W
O
P
User port cover
Figure 1-1 MC100-2TC/4TC appearance
User port
R
E
W
O
P
2 4 6
1 3 5 7
24V- FG
24 + V FG L1+ L1-
Figure 1-2 MC100-2TC/4TC ports
The extension cable connects MC100-2TC/4TC to the system, while the
extension port connects MC100-2TC/4TC to another extension module of the
system. For details on connection, see 1.2 Connecting Into System.
The user port of MC100-2TC/4TC is described in Table 1-1.
Table 1-1 User port description
Terminal Name
1 24V+
2 24V-
3
·
4
5, 9, 13, 17 L1+, L2+, L3+, L4+
7, 11, 15, 19 L1-, L2-, L3-, L4-
6, 8, 10, 12,
FG
14, 16, 18, 20
1.2 Connecting Into System
Through the extension cable, you can connect MC100-2TC/4TC to MC100
series basic module or other extension modules. See Figure 1-3.
Extension port cover
V N
U
2 4
R
Extension cable
Extension port
2 14
N
V
U
2 4
R
13
8 10 12 14 16 18 20
9 11 13 15 17 19
FG FG FG FG FG FG FG
L2+ L 2- L3+ L3- L4+ L 4-
Extension cable
Description
Analog power supply 24V+
Analog power supply 24V-
NC
GND
Positive poles of thermalcouples for
channels 1 to 4
Negative poles of thermalcouples for
channels 1 to 4
Shielding GND
Removing extension port cover
before connection
Basic module
Extension cable
Figure 1-3 Connecting into system
1.3 Wiring
The wiring of user port is shown in Figure 1-4.
Thermocouple
①
24 Vdc ± 10%
50 mA
④
Figure 1-4 Wiring of MC100-2TC/4TC user port
The circled 1 ~ 6 stands for the six points to be observed during wiring:
1. Thermocouple signals are connected through screen compensation cables,
which should be routed separate from power cables or other EMI-generating
cables. Long compensation cables are susceptible to EMI, so the
compensation cables should be advisably shorter than 100m. Compensation
cable has impedance, which can cause measurement error. This problem
can be addressed through characteristics adjustment. For details, see 3
Setting Characteristics.
2. If strong EMI exists, connect the FG and PG terminals together.
3. Properly ground the module's PG terminal.
4. The basic module's 24Vdc auxiliary power or any qualified external power
supply can be used to feed the module's analog circuit.
5. Short the positive and negative terminals of unused channels to avoid
detecting error data from that channel.
2 Indices
2.1 Power Supply
Table 2-1 Power supply
Item
24Vdc (-15%~20%), maximum allowable ripple voltage: 5%,
Analoge circuit
50mA (from the basic module or external power supply)
Digital circuit 5Vdc, 72mA (from basic module)
2.2 Performance
Table 2-2 Performance
Item
Celsius(°C)
Thermocouple: type K, J, E, N, T, R or S (all accessible
Input signal
to each channel), 4 channels
(240ms±2%)ms × 4 channels (no conversion for unused
Conversion speed
channels)
Type K -100°C~1200°C
Type J -100°C~1000°C
Rated temperature Type E -100°C~1000°C
range Type N -100°C~1200°C
Type T -200°C ~ +400°C Type T
Type R 0°C ~ 1600°C
Extension module
100 Ω
L4+
L4-
⑤ 100 Ω CH 4
FG
100 Ω
L1+
L1-
100 Ω CH 1
FG
②
24V+ + 5V
DC DC /
PGND AGND
converter
③
24V-
MC - 4TC
1 00
Description
Index
Fahrenheit (°F)
Type K -148°F ~ +2192°F
Type J -148°F ~ +1832°F
Type E -148°F ~ +1832°F
Type N -148°F ~ +2192°F
-328°F ~ +752°F
Type R 32°F ~ 2912°F
-5V
1