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Q520-2xxx (2 channel)
ACTIONI/Q
®
Q520
Loop Powered Multi-Channel T/C Input
Isolating, 2-Wire Transmitter
Provides 2 Isolated Current Loops in Proportion
to 2 Thermocouple Millivolt Inputs
Two 2-Wire Transmitters in a Single Package
Output Linear to T/C Millivolt Input
Standard Input Ranges
Description
The Q520 is a DIN rail mount, thermocouple input, dual channel,
two-wire transmitter. Each channel accepts a thermocouple input
and provides an isolated, 4-20mA output signal, linear to the
millivolt input. Cold junction compensation is provided and each
channel is fully isolated (1800VDC) from input to output and
channel to channel.
All ActionI/Q modules feature SnapLoc plug-in screw terminals for
easy installation and low Mean-Time-To-Repair (MTTR). Two or
more modules can slide together and interlock for solid, high
density mounting (by removing either the foot, or the adjacent
unit's faceplate, for right-hand side or left-hand side mounting,
respectively). The module to be attached will easily slide on to the
side of the mounted unit.
Application
Thermocouple input, two-wire transmitters are used to convert a
specific temperature range into a regulated 4-20mA signal. Two-wire
transmitters are primarily used in remote locations near the sensor
since they reduce the probability of signal errors and save wiring costs
by utilizing the two power wires to send the 4-20mA signal. The current
signal is usually monitored by a control system or data recorder.
High Density DIN Rail Mounting
SnapLocTM Plug-in Terminals
Output Loop Powered from 12 to 35VDC
Calibration
1. Connect the input to a calibrated thermocouple simulator or
millivolt source (thermocouple wire corresponding to the input
range may be required; check your calibrator's capabilities).
Connect the output in series to a voltage source capable of
supplying at least 20mA and a milliamp current meter.
Note: The voltage source (Vs) connnected to the output must be
sufficient to accommodate all other device loads (RL) in the
current loop:
Vs>12V+0.02xRL
2. Set the calibrator to the specified minimum temperature or
equivalent millivolt value and adjust the zero potentiometer for
4mA output.
3. Set the calibrator to the specified maximum temperature or
equivalent millivolt value and adjust the span potentiometer for
20mA output.
4. Repeat steps 2 and 3, as necessary. Note that the output is linear
to mV (not temperature).
Typically, thermocouples are used to measure high temperatures
such as in an oven or furnace. Thermocouple wires can be run a
short distance to a panel, or farther with the use of shielded wire,
without errors caused by noise or lead resistance in the wires. These
sensor wires are usually terminated at the two-wire transmitter and
converted into a 4-20mA signal which is highly immune to noise and
not affected by lead resistance, both of which can cause significant
errors in voltage signals transmitted over long distances.
Operation
Each channel derives its power from a (12-35VDC) source connected in series with the 4-20mA output loop. Typically a 24VDC
source is used for power, allowing 12VDC (600 ohms @ 20mA) for
other devices connected in series in the current loop. The outputs
of the Q520 are isolated from the inputs and protected from
reverse polarity. Zero and span pots are provided for each
channel. Standard input temperature ranges (see Table) are
calibrated to the rated accuracy. One range per module; two
channels per module.
segnaR025Q
slennahC2stupnIstuptuO
10B0-025Q 005ot0;JepyTF° Am02-4
20B0-025Q 0001ot0;JepyTF° Am02-4
30B0-025Q 005ot0;JepyTC° Am02-4
40B0-025Q 005ot0;KepyTF° Am02-4
50B0-025Q 0002ot0;KepyTF° Am02-4
60B0-025Q 0001ot0;KepyTC° Am02-4
70B0-025Q 005ot0;TepyTF° Am02-4
80B0-025Q 052ot0;TepyTC° Am02-4
90B0-025Q 004ot0;KepyTC° Am02-4
01B0-025Q 005ot0;KepyTC° Am02-4
Consult factory for non-standard ranges
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Specifications
r
Input:
Accepts two J, K or T Type thermocouples
Ranges: see Table
Burnout Detection:
Upscale standard; Downscale, option B
Cold-Junction Compensation Error
o
1
C typical, 0 to 80oC ambient;
3oC typical, -40 to 0oC ambient
Output Range:
4-20mA
Supply Voltage Range:
12 to 35VDC, each channel
Output Accuracy:
< 0.1% of full-scale input (mV) typical, < 0.2% max. @23oC including
linearity, repeatability and hysteresis (not including CJC error)
Adjustability:
Front accessed 10 turn pot.,
+ 5% of span for zero and span
Stability:
<0.025%/oC of full-scale max. for full-scale and zero
ESD Susceptibility:
Meets IEC 801-2 level 2 (4kV)
Isolation:
1800VDC or peak AC between input and outputand channel to
channel
Response Time:
100mSec typical (10 to 90%)
Temperature:
Operating: -40 to 80oC (-40 to 176oF)
o
Storage: -40 to 80
C (-40 to 176oF)
Humidity (non-condensing):
Operating: 15 to 90% (@45
o
C)
Wire Terminals:
Socketed screw terminals for 12-22 AWG
Weight:
0.34 lbs
Agency Approvals:
CSA certified per standard C22.2 (File No. LR42272).
UL recognized per standard UL508 (File No. E99775).
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1A
2A
3A detcennoCtoN 3C
4A
5A
6A detcennoCtoN 6C
1lennahC
1lennahC
2lennahC
2lennahC
1C detcennoCtoN
)+(tuptuO&rewoP
2C
)-(tuptuO&rewoP
4C detcennoCtoN
)+(tuptuO&rewoP
5C
)-(tuptuO&rewoP
2lennahC
)-(tupnIC/T
2lennahC
)+(tupnIC/T
1lennahC
)-(tupnIC/T
1lennahC
)+(tupnIC/T
Ordering Information
Models & Accessories
Specify:
1. Model: Q520 (see Table)
2. Option: B (downscale burnout detection), upscale standard
3. Input Range: (see Table)
4. Accessories: (see Accessories)
Accessories
ActionI/Q modules mount on standard TS32 (model MD02) or TS35 (model
MD03) DIN rail. In addition the following accessories are available:
MD02 TS32 DIN rail
MD03 TS35 x 7.5 DIN rail
WV905 24VDC Power Supply (500mA)
H910 24VDC Power Supply (1A)
H915 24VDC Power Supply (2.3A)
Printed on recycled pape
Dimensions
Action Instruments
Chessell
Eurotherm
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