Do-more T1H Series PLC User Manual, 1st Edition, Rev. C
6–16
Chapter 6: Specifications - Analog I/O Modules
NOTE 2:
The Calibrate Enable jumper comes from the factory not installed. Installing the jumper disables the
thermocouple active burn-out detection circuitry, which enables a thermocouple calibrator to be connected
to the module. To make sure that the output of the thermocouple calibrator is within the 5 V common mode
voltage range of the module, connect the negative side of the differential voltage input channel to the 0V
terminal, then connect the thermocouple calibrator to the differential inputs (for example, Ch 3+ and Ch 3-).
NOTE 3:
All thermocouple types are converted into a direct temperature reading with one implied decimal
place. Negative temperatures are represented in 2’s complement format. 2’s complement data format is
required to correctly display bipolar data on some operator interfaces.
NOTE 4:
The bipolar voltage input ranges may be converted to a 16–bit 2’s complement value.
T1F-14THM - 14 Channel Thermocouple Input - continued
Thermocouple/
Voltage Inputs
Jumper
T/C
Type 0
T/C
Type 1
T/C
Type 2
T/C
Type 3
J
X
X
X
X
K
X
X
X
E
X
X
X
R
X
X
S
X
X
X
T
X
X
B
X
X
N
X
C
X
X
X
0–5 V
X
X
±5V
X
X
0–156.25 mV
X
±156.25 mV
X
X
X = Jumper Installed
Blank Space = Jumper Removed
Jumper
Voltage Conversion Units
2’s
Complement
Units-0
X
Units-1
Jumper
Thermocouple Conversion Units
2’s Complement
!
F
!
C
Units-0
X
Units-1
Select Input Type
Select the Conversion Units
(See Notes 3 and 4)
X = Jumper Installed
Blank Space = Jumper Removed
NOTE 1:
This module can be configured to operate in unipolar mode which generates a range of values
from 0 to 65535 (instead of -32768 to 32767). Use the “:U”(unsigned) cast operator to get the proper
representation of the data when using a module that is configured for unipolar. For example: WX0:U, WX1:U.
