FW Murphy TDXM-DC Series User manual

00-02-0511
2019-07-10
Section 10
Temperature Scanner/Pyrometer
Model TDXM-DC
Installation and Operations Manual

Please read the following information before installing.
BEFORE BEGINNING INSTALLATION OF THIS FW MURPHY
PRODUCT:
Read and follow all installation instructions.
Please contact FW Murphy immediately if you have any
questions.
A visual inspection of this product for damage during shipping is
recommended before installation.
It is your responsibility to ensure that qualified mechanical and electrical
technicians install this product.
Disconnect all electrical power to the machine.
Make sure machine cannot operate during installation.
Follow all safety warnings of the machine manufacturer.

Table of Contents
General Information...................................................................................................................1
Description...................................................................................................................1
User Interface...............................................................................................................1
Thermocouple Types ...................................................................................................1
Control Options............................................................................................................1
Setpoint History............................................................................................................1
Sensor Inputs and Terminals .......................................................................................1
RS485 Serial Port ........................................................................................................1
Modbus Integer Holding Registers...............................................................................1
Replacement Parts.......................................................................................................1
TDXM-DC Mounting...................................................................................................................2
Dimensions ..................................................................................................................2
TDXM-DC Typical Wiring Diagram...........................................................................................3
TDXM-DC I/O Addresses...........................................................................................................4
Sequence of Operations ...........................................................................................................5
Scanning......................................................................................................................5
Setup............................................................................................................................................6
Map of Setup...............................................................................................................................9
Deviation from Average ..........................................................................................................11
TDXM-DC –Deviation from Average Calculations.....................................................11
Troubleshooting Tips..................................................................................................11
Notes:.........................................................................................................................11
Grouping Errors..........................................................................................................12
Specifications.............................................................................................................13

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Section 10 00-02-0511
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General Information
Description
The innovative TDXM-DC gives you a unique, configurable temperature scanner/pyrometer with a built-in power
supply. The design features a 7-character, 7-segment Liquid Crystal Display window with 1/2 inch (13 mm) easy-
to-read characters. Also located on the faceplate are membrane keys for easy configuring.
Highly reliable and versatile, the TDXM-DC accepts up to 24 type J or K grounded or ungrounded*
thermocouples. Each channel has three (3) adjustable set points SP1, SP2 and SP3. The SP1, SP2 and SP3 set
points correspond to the SP1, SP2 and SP3 outputs. Additionally, it has the selectable feature to monitor and
alarm or shut down on deviation from an average from up to two groups of temperatures (GRP/DEV; deviation
from average). One group could be exhaust temperatures, and another group could be bearing temperatures. The
TDXM-DC is capable of communicating with controllers, PLCs, computers or SCADA systems by a built-in RS485
serial communications port. The TDXM-DC is available for 10 - 32 VDC systems.
User Interface
The User Interface includes a numeric LCD display and a 5-button membrane keypad for readout and channel
configuration. Thermocouple types can be selected and set points entered through a series of set-up menus. See
Setup Menu in Set Up section.
Thermocouple Types
Each of the 24 channels on the TDXM-DC can be configured as J or K type thermocouples, and temperature
units can be selected as °F or °C for the readout of each channel. Unused channels can be set to Ignore and will
not be seen in the display and will not affect the outputs. All the unused channels must have the jumper installed.
Control Options
Each TDXM-DC model features three outputs: Two outputs are the Field Effect Transistor (FET), and one output
is the Form-C Relay. Each channel has three set points, one for each of the outputs. This allows for greater
system flexibility by grouping sets of channels through one output.
Setpoint History
The TDXM-DC stores the last setpoint trip for each output in non-volatile memory. For instance, if SP1 of channel
1 was the last SP1 tripped, the LCD display will read SP1 1 when in the Setpoint History for SP1.
Pressing the channel SP1-3 key will show the channel and the setpoint for that channel. If the trip was from a
group function, the offending channel is shown with the value of the deviation from average.
Sensor Inputs and Terminals
The TDXM-DC accepts up to 24 type J or K grounded or ungrounded* thermocouples using 24 pairs of screw
type connections. Each pair has a jumper from the factory. Any tripped setpoint is detected within two seconds
after the set point is exceeded.
RS485 Serial Port
The RS485 serial port (MODBUS RTU slave) on the back of the module is provided for communicating with
microcontrollers, PCs, PLCs and SCADA systems (see Typical Wiring Diagrams). It is recommended that a
termination resistor (customer supplied) be used when the TDXM-DC is the last device connected in a daisy-
chain configuration. The baud rate, number of stop bits and slave node number can be set using the keypad.
Communication is half-duplex. Modbus RTU function codes 3 and 6 are supported. Devices on the RS-485
network must have a common ground.
Modbus Integer Holding Registers
See TDXM-DC I/O Addresses.
Replacement Parts
Plug, kit, TDXM-DC: Terminal Plug replacement kit-P/N 10-00-7848
* We recommend the use of ungrounded thermocouples. Errors in readings with grounded thermocouples can
be the result of differences in grounding between different devices.

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TDXM-DC Mounting
Warning: Turn the power source off before mounting the TDXM-DC.
The TDXM-DC Series module was designed to be mounted within a weatherproof enclosure and is intended for
mounting in a flat panel.
1. Precut a square mounting hole of 5.5 in. (140 mm) and four mounting holes 0.25 in. (6.35 mm) dia., see
diagram.
2. Align the mounting studs to the drilled holes and insert the TDXM-DC from the front side of the panel.
3. Place a washer and a nut on each stud.
4. Equally tighten the nuts using an X-Pattern. The maximum torque is 9 in. lbs. Do not overtighten.
Dimensions
NOTE: The TDXM controller and TDXM-DC are the same product. The controller shows TDXM only.
IMPORTANT:For outdoor use, mount the TDXM-DC controller in a weatherproofenclosure.

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TDXM-DC Typical Wiring Diagram
WARNING: Route the sensor input wires away from other wires (2 in. [51 mm] minimum). For
hazardous application requirements, the TDXM-DC complete system must be installed in
accordance with the national electrical code (NEC) Class I, Division 2, Groups C & D (article 504)
specifications and per FW Murphy drawing number10-08-0006

Section 10 00-02-0511
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TDXM-DC I/O Addresses
Channel
Eng. Units
SetP#1
SetP#2
SetP#3
Offsets
TC Type
Ch#1
40,001
40,031
40,055
40,079
40,103
40,127
Ch#2
40,002
40,032
40,056
40,080
40,104
40,128
Ch#3
40,003
40,033
40,057
40,081
40,105
40,129
Ch#4
40,004
40,034
40,058
40,082
40,106
40,130
Ch#5
40,005
40,035
40,059
40,083
40,107
40,131
Ch#6
40,006
40,036
40,060
40,084
40,108
40,132
Ch#7
40,007
40,037
40,061
40,085
40,109
40,133
Ch#8
40,008
40,038
40,062
40,086
40,110
40,134
Ch#9
40,009
40,039
40,063
40,088
40,111
40,135
Ch#10
40,010
40,040
40,064
40,068
40,112
40,136
Ch#11
40,011
40,041
40,065
40,089
40,113
40,137
Ch#12
40,012
40,042
40,066
40,090
40,114
40,138
Ch#13
40,013
40,043
40,067
40,091
40,115
40,139
Ch#14
40,014
40,044
40,068
40,092
40,116
40,140
Ch#15
40,015
40,045
40,069
40,093
40,117
40,141
Ch#16
40,016
40,046
40,070
40,094
40,118
40,142
Ch#17
40,017
40,047
40,071
40,095
40,119
40,143
Ch#18
40,018
40,048
40,072
40,096
40,120
40,144
Ch#19
40,019
40,049
40,073
40,097
40,121
40,145
Ch#20
40,020
40,050
40,074
40,098
40,122
40,146
Ch#21
40,021
40,051
40,075
40,099
40,123
40,147
Ch#22
40,022
40,052
40,076
40,100
40,124
40,148
Ch#23
40,023
40,053
40,077
40,101
40,125
40,149
Ch#24
40,024
40,054
40,078
40,102
40,126
40,150
Miscellaneous
Cold Junction Average
40025
Deviation Error #2
40160
CJ1 Celsius Degrees (*100)
40026
Group Size #1
40161
CJ2 Celsius Degrees (*100)
40027
Deviation Setpoint #1
40162
Cold Junction Display (0,1, 2)
40028
Enable Value #1
40163
Delay Display
40029
Enabling Channel #1
40164
Force Outputs
40030
Group Size #2
40165
SP1 Channel Alarm
40151
Deviation Setpoint #2
40166
SP1 Set Point
40152
Enable Value #2
40167
SP2 Channel Alarm
40153
Enabling Channel #2
40168
SP2 Set Point
40154
Delay ADC (from 40 to 99 mS)
40169
SP3 Channel Alarm
40155
Watchdog cnt.
40170
SP3 Set Point
40156
RTU Node #
40171
Deviation Alarm #1
40157
Revision (*100)
40172
Deviation Error #1
40158
ID Prefix Number (0-99)
40173
Deviation Alarm #2
40159
ID Suffix Number (0-9999)
40174
NOTE: The term (*100) refers to value times 100

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Sequence of Operations
Scanning
Normal Scan
During Normal Scan mode, each channel is displayed for the
period set in the CH SCAN DELAY (Setup 5). The default is 3
seconds. When the CH SCAN DELAY expires, the display
changes to show the next channel. After all channels have been
displayed, the sequence starts again from the first channel. The
LCD looks like this:
The Normal Scan mode can be turned ON or OFF. To toggle the
Normal Scan mode, press and hold the SCROLL button until the
display shows (approx. 1 sec.).
Or
It is possible to disable channels from being displayed, by
selecting the channel as Ø=Ignored in the TC TYPE / UNITS
(Setup 1).
LOCKED SCAN
During a Locked Scan, the Normal Scan is temporarily interrupted
and only the Locked Channel is displayed for 60 seconds. A
channel is locked when the UP or DOWN buttons are used to
select a channel during Normal Scan mode. To unlock and
resume Normal Scan mode, press the SCROLL button.
After 60 seconds, the Normal Scan mode will resume, if no other
keys have been pressed.
It should be noted that while only one channel is being displayed,
all channels are being scanned and checked against their (3) set
points every 2 seconds. All set points remain active at all times.
CHANNEL SP1-3
During Normal or Locked Scan mode, the set points for each
channel can be viewed. To enter the CHANNEL SP view for the
channel currently displayed, press and hold the CHANNEL SP1-3
button for approx. 1 second.
The display will first show:
From this display, use the UP button to view SP2 and SP3. Press
the CHANNEL SP1-3button again to return to the Normal or
Locked Scan mode. No changescan be made to the set points
from this view. To change a set point, use the SETPOINTS (setup
3) menu.
SP HISTORY
During Normal or Locked Scan mode, a history of the last channel
setpoint trip can be viewed. To enter the SP HISTORY channel
display, press the SP HISTORY button.
The display will first show:
The value on the right represents the channel that tripped for the
SP# shown. From this display, use the UP button to view SP2 and
SP3. For each SP# it is possible to view the set point for that
channel when the channel tripped. Press the CHANNEL SP1-3
button to view the setpoint for the channel stored in the history.
If the group/deviation caused the trip, the display will show:
Pressing the CHANNEL SP1-3 button will show the channel that
caused the trip and the temperature deviation that caused the trip.
The temperature deviation shown is an absolute value. In other
words if the deviation was a negative number, a positive number
will be shown.
SP3 LATCH
The TDXM-DC W/SP3 LATCH is a special version available to
latch one of the three digital outputs when a trip is detected. For
this version only, setpoint values are first-out. If a sensor channel
temperature rises above set point, SP3 will activate and remain
active until RESET or power is recycled in the unit. The display
will show 1 2 3 (#3 is ON). The icons for SETPOINT 1 and 2 may
also be ON depending on the status of those set points.
If the tripped channel clears, the output for SP3 will not clear and
the SP History for SP3 will not be overwritten by other SP3 trips.
Example: If CH21 and CH22 have an SP3 setpoint of 180 and
CH21 temperature rises to 190, SP3 OUT will be activated, and
the SP History will show SP3 21 as the cause for trip. If
temperature for SP3 21 falls below 180 or SP3 22 rises above
180 after the trip has occurred, the SP3 OUT will remain active,
and the SP History will not be altered. All channels continue to be
scanned and compared against SP1 and SP2 setpoint values.
To RESET the SP3 Output and allow continued scanning of SP3
set points, press and hold SCROLL ENTER and DOWN ARROW
keys simultaneously for at least 3 seconds. The display will
indicate the latch has been cleared when the number 3 is no
longer visible on the SETPOINT icon display. The display will
show SETPOINT 1 2 3 (#3 is OFF). The icons for SETPOINT 1
and 2 may also be ON depending on the status of those set
points.

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Setup
To enter the SETUP routines, press the SCROLL ENTER and
CHANNEL SP1-3 buttons simultaneously for 5 seconds. The
display will first show:
While continuing to depress the two buttons, the display will show
progress in the form of dashes until the 5 seconds expires, as
shown here:
After the 5-second delay expires, the user will be required to enter
a passcode. This shows that display (code is on a single sheet of
paper provided with the instructions to the original buyer of the
product):
Use the UP and DOWN buttons to set the correct code and press
the SCROLL ENTER button to enter the SETUP menu. If the
correct code is not entered, the display will show:
After three attempts, the display will return to Normal Scan mode.
Upon entering the correct code, the SETUP menus can be
accessed. The LCD will display:
Use the UP and DOWN buttons to select the desired SETUP
number and press the SCROLL ENTER button. To exit the
SETUP menu, select Setup 0 and press the SCROLL ENTER
button. In the SETUP menu, a zero shortcut can be used to return
to a zero value such as CH 0 or SETUP 0. Press the CHANNEL
SP1-3 button to zero any menu value.
SETUP MENU
The Setup menu is as follows:
Setup 0 = EXIT
Setup 1 = TC TYPE / UNITS
Setup 2 = OFFSET
Setup 3 = SETPOINTS
Setup 4 = GRP / DEV SETUP
Setup 5 = CH SCAN DELAY
Setup 6 = CJ DISPLAY SELECTION
Setup 7 = RTU / BAUD SETUP
Setup 1 TC TYPE / UNITS
Each channel can be individually set to display in units °C or °F
for Type J or K thermocouples or ignored completely. When a
channel is ignored, it is no longer scanned or displayed. Ignored
channels do not appear in other SETUP menus. When the display
shows SETUP 1, pressing the SCROLL ENTER button will
change the display to the entrance and exit display for this setup.
The LCD will first display the Channel Select display:
Use the UP and DOWN buttons to select the desired channel to
set up. (Select CH 0 to exit.) Press the SCROLL ENTER button,
and the display will read:
0 = Ignore
1 = J type for °F
2 = K type for °F
3 = J type for °C
4 = K type for °C
NOTE: All unused channels must have the jumper installed.
Use the UP and DOWN buttons to set the desired channel type.
Press the SCROLL ENTER button to return to the Channel Select
display. Repeat until all channels are configured. Return to CH 0
to exit this setup. Press the UP button to go to SETUP 2.
Setup 2 OFFSET
It is possible to adjust the temperature value for each channel to
match analog gauges or other instrumentation. This OFFSET is
added to the actual scanned temperature. The offset for each
channel is adjustable from -20 to +20 in the units set (for °F or °C)
for that channel. For example, a reading of 100° C with an
OFFSET of 5 would be adjusted to 105° C. This adjusted value is
used for comparison to set points as well as display. At SETUP 2,
press SCROLL ENTER. The LCD will first display the Channel
Select entrance/exit display:

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Setup (continued)_________________________________________________
Use the UP and DOWN buttons to select the desired channel to
set up. (Select CH 0 to exit.) Press SCROLL ENTER, and the
LCD will read:
Use the UP and DOWN buttons to adjust the offset for the
channel being set. Press the SCROLL ENTER button to go back
to the channel display. Go to CH 0 to exit by pressing SCROLL
ENTER. Press the UP button to go to SETUP 3.
Setup 3 SETPOINTS
Press the SCROLL ENTER button to get into the setpoint setup.
The LCD will first display the Channel Select entrance/exit
display:
Use the UP and DOWN buttons to select the desired channel to
setup. Press the SCROLL ENTER button and the LCD will read:
SP# indicates the output that the setpoint is tied to. For example,
SP 1 is tied to Output 1 (SP1 OUT). Use the UP and DOWN
buttons to set the desired set point. Press the SCROLL ENTER
button to accept the entry. Repeat for SP2 and SP3, and you will
return to the Channel Select display. Repeat until all set points
are entered.
Note that entering Ø (zero) for a setpoint will disable the output for
that particular channel. With zero as the set point, open
thermocouple will not cause that output to activate. In this way,
channels can be grouped, if desired. Further, an alarm before
shutdown feature can be implemented by setting the set points
progressively higher. For example, if SP1 = 900 and SP2 = 1000,
Output 1 (SP1 OUT) could be wired to an Alarm Input and Output
2 to a Shutdown Input on an annunciator. The range of
adjustment is 0-1999 in the Units (°F or °C) chosen for those
channels. Once all set points have been entered or checked, go
to the CH 0 entrance/exit display. Press the SCROLL ENTER
button to exit. Then press UP to go to Setup 4.
Setup 4 GRP / DEV SETUP
At the Setup 4, press the SCROLL ENTER button. The LCD will
first display the Number of Channels in the first group to Average.
All first group settings have the letter A. The second group
settings have the letter B:
If the group is set to Ø (zero), the function is disabled. The first
group must start with Channel 1. For an example on a 16
cylinder engine, group will be set to 16. The first 16 channels will
be in the group. The group can be all 24 channels. If a second
group is used, it starts with the first channel after the first group.
Use the UP and DOWN buttons to select the number of channels
that will be grouped in the averaging group. Enter Ø (zero) to
disable this feature. Press the SCROLL ENTER button. Next
enter the allowable deviation. This is a temperature adjustable
from 0–255 in the Units (°F or °C) chosen for the channels:
If any of the grouped channels (beginning with channel 1)
deviates from the average of the other channels by the amount
entered, Output 1will be energized. Use the UP and DOWN
buttons to enter an amount. Press the SCROLL ENTER button.
Next enter the enable value. This is a temperaturesetpoint for
enablingthe group/deviation function. If the temperatureof the
channelselectedin the next setting exceeds this enabledset
point, the group/deviationfunction becomes active:
Use UP and DOWN to enter a value. Press the SCROLL ENTER
button and enter the enable channel:
If this channel value is set to Ø (zero), any of the grouped
channels will enable the group/deviation function when any of
the channels reaches the EN value. If this channel value is set
to any other value (1-24), then ONLY that channel will enable
the deviation function when it reaches the EN value. The
enabling channel does not have to be in the group. Use the UP
and DOWN buttons to enter a value.
Press SCROLLENTER, andthe displaywill go to grpb for the
second group. If a second group is not desired, the grpb setting
should be set to zero.With a setting of zero. pressingscroll enter
will bring back the setup 4 display. If a second group is used, it is
done like the first group.
Setup 5 CH SCAN DELAY
At Setup 5, press SCROLL ENTER. The LCD will display the
current display delay between channels during Normal Scan. This
delay is also the update delay for the temperaturereadings. The
channels are still scanned within 2 seconds and trip point
comparisons are made, but the actual display of the temperature
is delayed by this time.

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Setup (continued)__________________________________________________
Use the UP and DOWN buttons to enter the desired Channel Scan
Delay value (settable from 0 to 10 sec.). This is only for the display.
Press the SCROLLENTERbutton to return toSetup 5. Press the UP
button to go to Setup 6.
Setup 6 CJ DISPLAY Selection
At Setpoint 6, press the SCROLL ENTER button. The LCD will dis-
play the Cold Junction Sensor Display setting:
0 = Disable display
1 = °F
2 = °C
Use the UP and DOWN buttons to set the display or display units,
then press SCROLL ENTER. Press the UP button to go to Setup 7.
Setup 7 RTU / BAUD
At Setpoint 7, press the SCROLL ENTER button. The LCD will dis-
play the current RTU Node address assigned to the TDXM-DC:
Use the UP and DOWN buttons to enter the desired RTU Node
Number. This is adjustable from 0-255. Press the SCROLL ENTER
button and enter the baud rate and number of stop bits selection:
0 = 9600 Baud, N,8,1
1 = 19.2 KBaud, N,8,1
2 = 38.4 KBaud, N,8,1
3 = 9600 Baud, N,8,2
4 = 19.2 KBaud, N,8,2
5 = 38.4 KBaud, N,8,2
Use the UP and DOWN buttons to set the desired baud rate and
number of stop bits. Press SCROLLENTER to go back to Setpoint 7
display. Press the UP button to go to Setup 8.
Setup 8 Unit Number
At Setpoint 8, press SCROLL ENTER the display will show:
This is the prefixfor the unit number. It can be set from Ø (zero) to 99
using the UP and DOWN buttons. Once this is set, pressing SCROLL
ENTER will give the following display:
This is the suffix for the unit number. It can be set from 0–9999 using
the UP and DOWN buttons.
Within this, the unit number can be set up to 999999. The unit
number is only displayed here but is available as MODBUS registers
for remote communications.

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Map of Setup

Section 10 00-02-0511
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Map of Setup (continued)

Section 10 00-02-0511
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Deviation from Average
TDXM-DC –Deviation from Average Calculations
This example is for a 6-cylinder engine.
Figure 1
Figure 2
Deviation from Average
Calculations1
TDXM-DC
Channels
Enabling Chan nel
grPA= 6
Absolute (1 –((2+3+4+5+6)/5))
1
Included
Absolute (2 –((1+3+4+5+6)/5))
2
Absolute (3 –((1+2+4+5+6)/5))
3
Absolute (4 –((1+2+3+5+6)/5))
4
Absolute (5 –((1+2+3+4+6)/5))
5
Absolute (6 –((1+2+3+4+5)/5))
6
Troubleshooting Tips
If a temperature reading is incorrect, check the following:
1. Setup 1 –TC Type and Units correct?
2. Cold junction reading reasonable?
3. Install a jumper in place of the TC, should read the same as cold junction temperature.
4. Check for proper and recommended wiring practices.
A. Shielded thermocouple grade extension wire.
B. No splices involving metals other than TC type metals?
C. TC wire separation from other wiring.
5. Check for possible grounded thermocouple problems.
6. Check DC power voltage to see proper range of voltage and possible noise.
If the display shows all dashes (----------), it means all channels are set to ignore and the cold junction display is
disabled.
7. If the SP3 Latch model does not unlatch, check the following:
A. Be sure the display is in the scan mode. The unlatch operation cannot be performed while
viewing the history displays.
B. Verify that the channel in the SP3 history has cleared. To do this exit the SP history and use the
arrow keys to navigate to the channel in the scan display mode. Take note of the current
temperature and press and hold Channel SP1-3 to verify the temperature setpoint SP3 for the
channel. (See mode details on CHANNEL SP1-3 key function.)
Notes:
Figure 1, these numbers represent the data from the channels. The values that are derived are not
visible. The deviation from average calculation compares each channel to the rest of the group’s
averaged value.
Figure 1, the setting group (grPA) selects how many channels are included, from channel 1 for the
first group. The second group/starts with the first channel after the first group. These channels will be
involved in the deviation from average calculation.
Figure 2, the setpoint represents the enabling threshold (EnA or Enb). The current represents the
enabling channel(s) (EChA or EChb) (0=any channel in the group). When the enabling channel(s)
exceed the enabling threshold, the deviation from average calculations will take place.
When a channel’s deviation exceeds the deviation (dEvA or dEvb) set point, the deviated channel will
be recorded in the history.

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Grouping Errors
Because of the flexible nature of the TDXM-DC, the setup can cause conflicts when settings are made. If there is
a conflict which will cause problems in the Group/deviation function, there will be error codes displayed. The
display will show one of the values below:
Group #1
Error 11 - Channel 1 disabled
Error 12 - Too few channels
Error 13 - Inconsistent engineering units
Error 14 - Channels skipped/disabled
Error 15 - Deviation value set to 0
Group #2
Error 21 - Channel 1 disabled
Error 22 - Too few channels
Error 23 - Inconsistent engineering units
Error 24 - Channels skipped/disabled
Error 25 - Deviation value set to 0
Error 26 - Group size goes past the 24th channel
CJ Error
If a cold junction sensor fails, the display will show: CJError. Output 3 (SP3. out) will be de-energized to the
tripped state, and SP1 out and SP2 out will turn on. The SP1, SP2 and SP3 histories will show the number 61.
The TDXM-DC will no longer scan channels or allow use of the keypad. If this happens, the unit should be
replaced.
Watchdog Error
If an internal processor or other hardware failure occurs, the display will show the number 60. If this happens, the
TDXM-DC will no longer scan channels or allow use of the keypad. If this happens the unit should be replaced.

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Specifications
Power Input (Operating Voltages): 10–32 VDC, 4.2 W max
Sensor Inputs: Up to 24 type J or K grounded or ungrounded thermocouples*
Outputs: Two (2) Outputs 0.5 A, 350 VDC, FET-sink to ground to trip
One (1) Form C Solid State Relay Output 0.125 A, 350 VDC/240 VAC
NOTE: The form C relay output is de-energized for a trip condition. The NC terminal is
closed and the NO terminal is open for trip.
Communications: RS485 Serial Port, Modbus RTU slave
Operating, Storage, and Display Temperature: -40° F to 185° F (-40° C to 85° C)
Sensor Scan Rate: Scans all channels in 2 seconds
Range:
Type J: 0° F - 1538° F (0° C - 837° C)
Type K: 0° F - 1999° F (0° C - 1093° C)
Display Type: Custom 7-segment, 7-character type with temperature units’ indication and setpoint trip indication
Accuracy:
Cold junction: Better than ±1.0° F (±0.5° C)
Type J or K: ±2° F (±1° C); 100° F - 1999° F (38° C - 1093° C).
Cold Junction Compensation: -40°F to 185° F (-40° C to 85° C).
Open Thermocouple Detection: Drives channel reading high
NOTE: ANSI MCQ6.1 states limits of error for thermocouples.
Type J - 32° F -1382° F (0° C - 750° C) ±4.4° F (±2.2° C) or ±0.75%.
Type K - 35° F - 2282° F (0° C - 1250° C) ±4.4° F (±2.2° C) or ±0.75% whichever is
greater.
Third-Party Approvals: CSA Class I, Division 2, Groups C and D
* We recommend the use of ungrounded thermocouples. Errors in readings with grounded thermocouples can
be the result of differences in grounding between different devices.

Section 10 00-02-0511
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Section 10 00-02-0511
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Notes