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High Density
16 CHANNEL
Thermocouple Input
Module
Product Specifications
and Installation Data
1 DESCRIPTION
The Horner APG High Density Thermocouple Input Module offers superior channel density, with 16 input
channels per module. This module allows thermocouple temperature sensors to be directly connected to
the PLC without external signal processing (transducers, transmitters, etc.). All analog and digital
processing of the thermocouple signal is performed on the module. Temperature resolution is 0.5°C, and
temperature values may be reported to the PLC %AI I/O table in 0.5°C or 0.5°F increments. This module
features open circuit detection, where the %AI register goes to its maximum value upon an open circuit
condition, and a corresponding %I bit is energized. Field wiring is connected to a special high density, 32
position removable terminal block. Recommended wire size is 24 AWG.
Figure 1 – HE693THM166 (Front View) Figure 2 – HE693THM166 (Right Side View)
06 December 2004 MAN0090-05
THERMOCUPLE
HE693THM166 S/N: 1965
Horner APG, LLC.
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2 SPECIFICATIONS
Table 1 – HE693THM166
Specification THM166 Specification THM166
Power Consumption 100mA @ 5VDC
Number of Channels 16 Input Impedance 20Mohms
Types Supported J, K, N, T, E, R, S, B, C, X
J: -210 to
+760°C
K: -270 to
Input Range (Temp)
Resolution
Accuracy +/- 0.5°C typical (J, K, N, T)
+1372°C
* X: -210 to
+1200°C
(+/- 2°C
Maximum.)
(Reading not
guaranteed
below -200°C.)
T: -270 to
+400°C
E: -270 to
+1000°C
N: -270 to
+1300°C
0.5°C or 0.5°F
R: 0 to
+1768°C
S: 0 to
+1768°C
B: 0 to
+1820°C
C: 0 to
+2320°C
I/O Points
Required
Maximum Safe
Overload
Common Mode
Range
Common Mode
Rejection
A/D Conversion
Type
A/D Conversion
Time
Operating
Temperature
Relative
Humidity
16 %AI, 16 %I
+/- 35V
+/- 12V
>100dB
Integrating
40 channels
per second
0 to 60°C (32
to 140°F)
5% to 95%
non-
condensing
*NOTE: Model F and later support the Extended Range Type J (X).
3 CONFIGURATION
To reach this screen, select I/O Configuration (F1), cursor over to the slot containing the module and select Other
(F8), and Foreign (F3).
Figure 3 - Foreign Module Configuration
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MAN0090-05 06 December 2004 PAGE 3
% Temperature Change Completed
Response Time (Milliseconds)
Table 2 – Configuration Parameters
%I
Size
Size
16 16 1
1 2 3 4 5
0:0.5°C
(see
chart)
1:0.5°F
Byte %AI
00: J 03: T 06: S
01: K 04: E 07: B
0
02: N 05: R
08: C
09: X
Byte 2 sets digital filtering, Byte 3 sets temperature units, and Byte 5 sets the thermocouple type.
100
90
80
70
60
50
40
30
20
10
0
0 2000 4000 6000 8000
Figure 4 - Digital Filtering
The effect of digital filtering (set with Byte 2) on module response to a temperature change. (% temp
change completed vs. time).
Table 3 – Temperature Scaling
Byte 3 Formula
0 °C = %AI / 2
1 °F = %AI / 2
Temperature values are written to the %AI registers in 0.5°C or 0.5°F increments, depending upon the
value of Byte 3.
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4 WIRING
5 INSTALLATION AND SAFETY
Special care must be taken with grounded junction sensors to avoid applying a voltage potential to the
thermocouple junction.
Extension wire of the proper Thermocouple type must be used. Keep total wire resistance less than
100Ω to maintain rated accuracy.
Route extension wiring in its own conduit. Shielded, twisted pair extension wiring offers best noise
immunity.
If shielded wiring is used, a good earth ground connection is critical.
Recommended wire size for terminal strip is 24 AWG.
Adhere to the following safety precautions whenever any type of connection is made to the module.
Connect the green safety (earth) ground first before making any other connections.
When connecting to electric circuits or pulse-initiating equipment, open their related breakers. Do not
make connections to live power lines.
Make connections to the module first; then connect to the circuit to be monitored.
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MAN0090-05 06 December 2004 PAGE 5
Route power wires in a safe manner in accordance with good practice and local codes.
Wear proper personal protective equipment including safety glasses and insulated gloves when making
connections to power circuits.
Ensure hands, shoes, and floor are dry before making any connection to a power line.
Make sure the unit is turned OFF before making connection to terminals. Make sure all circuits are de-
energized before making connections.
Before each use, inspect all cables for breaks or cracks in the insulation. Replace immediately if
defective.
6 TECHNICAL ASSISTANCE
For manual updates and assistance, contact Technical Support at the following locations:
North America:
(317) 916-4274
www.heapg.com
email: techsppt@heapg.com
Europe:
(+) 353-21-4321-266
www.horner-apg.com
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NOTES
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