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G428-0001
ULTRA SLIMPAK
®
G428-0001
T/C Input Field Configurable Isolator
Provides an Isolated, Linearized DC Output
in Proportion to a Thermocouple Input
Field Configurable Input Ranges
for J, K, T, R, S, E, and B Type Thermocouples
Eliminates Ground Loops
Field Configurable Output Ranges: 0-5V, 0-10V, 0-
1mA, 0-20mA and 4-20mA
Description
The G428 is a DIN rail mount, thermocouple input signal conditioner with 1800VDC isolation between input, output and power.
The field configurable input and output offer flexible, wide
ranging capability for J, K, T, R, S, E and B type thermocouples.
The G428 input can be configured for over 60 thermocouple
temperature ranges (see Table 6). The output is linear to temperature
and can be set for either 0-5V, 0-10V, 0-1mA, 0-20mA or 4-20mA.
Wide ranging, precision zero and span pots allow 50% adjustablity
of offset and span turn-down within each of the ranges. For
example, the 0-1000°C range could be offset and turned down to
provide a 4-20mA signal representing 500-1000°C. Similarly,
adjustment can be referenced to the output range. The example
above could be used to provide a 12-20mA signal from a 750 to
1000°C temperature input.
Application
Three way isolation in the G428 completely eliminates ground
loops from any source. Isolation protects expensive SCADA
systems from ground faults and allows the noise reduction
benefits of grounded thermocouples to be realized.
Ultra Slim Housing for High Density Installations
Flexible Power Supply Accepts 9 to 30 VDC
ASIC Technology for Enhanced Reliability
RoHS Compliant
CAL OK
This yellow LED is continuously on when the device is calibrated.
TROUBLE
This yellow LED is off during the normal operation. Consult factory
if this LED is on, indicating a microprocessor malfunction.
Configuration
The G428 offers 50% input zero and span adjustablity within each
of the fullscale input ranges. Unless otherwise specified, the
factory presets the Model G428 as follows:
Input:
Range:
Output: 4 to 20mA
Burn Out: Upscale
The DC power input accepts any DC source between 9 and 30V;
typically a 12V or 24VDC source is used (see Accessories).
For other I/O ranges, refer to Tables 1 through 6 and reconfigure
switches SW1 and SW2 for the desired input type range and
output.
J-type
0 to 500°C
The G428 is equipped with cold junction compensation (CJC)
circuitry to provide ice-point reference. Upscale or downscale
thermocouple burnout detection is switch selectable.
High density DIN rail mounting offers an extremely compact
solution to save valuable panel space.
Diagnostic LEDs
The G428 is equipped with front panel LEDs for INPUT (green),
TROUBLE (yellow) and CAL OK (yellow). At start-up, both the
INPUT and the CAL OK LEDs flash alternately for 10 seconds.
INPUT
This green LED is lit continuously when the input is within the
specified range. In the full temperature range setting, for the
overrange condition the LED flashes at 8Hz; for the under range
condition it flashes at 4Hz. In a sub-range temperature setting, for
the overrange condition the LED flashes at 1Hz; for the under
range condition it flashes at 0.5Hz.
WARNING: Do not change switch settings with power applied.
Severe damage will result!
1. Choose the desired temperature range from Table 6, then use
Table 1 and 2 to configure the switches (as described in the
following steps) for thermocouple type and range.
2. With DC power off, position input switches 1 and 2 of SW2 for
the desired burnout detection mode.
3. Set positions 4 through 10 of SW2 for the desired thermocouple
range and type.
4. Set positions 1 through 8 of SW1 for the desired output signal.
(Table 4)
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Calibration
epyTCTegnaRegnaRerutarepmeT
K
1)F¡8942ot0(C¡0731ot81-
2)F¡2381ot0(C¡0001ot81-
3)F¡239ot0(C¡005ot81-
4)F¡284ot0(C¡052ot81-
5)F¡752ot0(C¡521ot81-
7)F¡8942ot2381(C¡0731ot0001
8)F¡2381ot239(C¡0001ot005
9)F¡239ot284(C¡005ot052
01)F¡284ot752(C¡052ot521
21)F¡2381ot2831(C¡0001ot057
31)F¡239ot707(C¡005ot573
41)F¡2831ot823-(C¡057ot002-
51)F¡284ot823-(C¡052ot002-
61)F¡23ot823-(C¡0ot002-
S,R
1)F¡0023ot221(C¡0671ot05
2)F¡2381ot221(C¡0001ot05
3)F¡239ot221(C¡005ot05
4)F¡284ot221(C¡052ot05
7)F¡0023ot2381(C¡0671ot0001
8)F¡2381ot239(C¡0001ot005
9)F¡239ot284(C¡005ot052
01)F¡284ot752(C¡052ot521
21)F¡2381ot2831(C¡0001ot057
31)F¡239ot707(C¡005ot573
T
3)F¡257ot0(C¡004ot81-
4)F¡284ot0(C¡052ot81-
5)F¡752ot0(C¡521ot81-
9)F¡257ot284(C¡04ot052
01)F¡284ot752(C¡052ot521
31)F¡257ot707(C¡004ot573
41)F¡257ot832-(C¡004ot051-
51)F¡284ot832-(C¡052ot051-
61)F¡23ot832-(C¡0ot051-
1. After configuring the dip switches, connect the input to a
calibrated thermocouple source. Connect the output to the
device (or a load approximately equivalent to the device) and
apply power.
Note: To maximize thermal stability, final calibration should be
performed in the operation installation, allowing approximately 1
to 2 hours for warm up and thermal equilibrium of the system.
2. Set the calibrator to the desired minimum input and adjust the
zero potentiometer for the desired minimum output.
3. Set the calibrator to the desired maximum input and adjust the
span potentiometer for the desired maximum output.
4. Repeat steps 2 and 3, if necessary for best accuracy.
G428 Thermocouple Accuracy
Table 5:
epyTCTegnaRerutarepmeTycaruccA
J
K
K
K
E
T
R
S
B
C¡057ot002-
)F¡2831ot823-(
C¡041ot002-
)F¡022-ot823-(
C¡0521ot041-
)F¡2822ot022-(
C¡0731ot0521
)F¡8942ot2822(
C¡0001ot051-
)F¡2381ot832-(
C¡004ot051-
)F¡257ot832-(
C¡0671ot05
)F¡0023ot221(
C¡0671ot05
)F¡0023ot221(
C¡0281ot005
)F¡8033ot239(
C¡0.2-/+
)F¡6.3-/+(
C¡0.5-/+
)F¡0.9-/+(
C¡0.2-/+
)F¡6.3-/+(
C¡0.4-/+
)F¡2.7-/+(
C¡5.2-/+
)F¡5.4-/+(
C¡0.3-/+
)F¡4.5-/+(
C¡0.6-/+
)F¡8.01-/+(
C¡0.6-/+
)F¡8.01-/+(
C¡0.5-/+
)F¡0.9-/+(
G428 T/C Types
:yeK desolCroNO=1=
G428 Burnout Settings
:yeK desolCroNO=1=
Table 1:
epyT
B
E
J
K
R
S
T
Table 3:
tuonruB
:yeK desolCroNO=1=
G428 Range Settings
2WS
89 01
2WS
12
dewollAtoN
elacspU
elacsnwoD
enoN
Table 4:
G428 Output Settings
tuptuO
12345678
V5ot0
V01ot0
Am1ot0
Am02ot4
Am02ot0
Table 2:
egnaR
4567
1
2
3
4
5
6
7
8
9
01
11
21
31
41
51
61
:yeK desolCroNO=1=
1WS
2WS
epyTCTegnaRegnaRerutarepmeT
6)F¡8033ot239(C¡0281ot005
7)F¡8033ot2381(C¡0281ot0001
8)F¡2381ot239(C¡0001ot005
B
11)F¡8033ot239(C¡0281ot005
21)F¡2381ot2831(C¡0001ot057
2)F¡2381ot0(C¡0001ot81-
3)F¡239ot0(C¡005ot81-
4)F¡284ot0(C¡052ot81-
5)F¡752ot0(C¡521ot81-
8)F¡2381ot239(C¡0001ot005
9)F¡239ot284(C¡005ot052
E
J
01)F¡284ot752(C¡052ot521
21)F¡2381ot2831(C¡0001ot057
31)F¡239ot707(C¡005ot573
41)F¡2831ot832-(C¡057ot051-
51)F¡284ot832-(C¡052ot051-
61)F¡23ot832-(C¡0ot051-
2)F¡2831ot0(C¡057ot81-
3)F¡239ot0(C¡005ot81-
4)F¡284ot0(C¡052ot81-
5)F¡752ot0(C¡521ot81-
8)F¡2831ot239(C¡057ot005
9)F¡239ot284(C¡005ot052
01)F¡284ot752(C¡052ot521
31)F¡239ot707(C¡005ot573
41)F¡2831ot823-(C¡057ot002-
51)F¡284ot823-(C¡052ot002-
61)F¡23ot823-(C¡0ot002-
Table 6: G428 Thermocouple Range Settings
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Figure 1: G428 Factory Cal: J-Type, 0-500°C,
4-20mA, Upscale
Figure 2: Wiring Diagram for G428
Note: All Ultra SlimPak modules are designed to operate in ambient
temperatures from 0 to 55°C when mounted on a horizontal DIN rail. If
five or more modules are mounted on a vertical rail, circulating air or
model HS01 Heat Sink is recommended. Refer to HS01 Technical
Bulletin (#721-0549-00) or contact the factory for assistance.
Figure 3: Mounting Multiple Modules
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Specifications
r
Inputs:
Sensor Types: J, K, T, R, S, E, B
Input Ranges: See Table 6.
Impedance: >1M Ohms
Bias Current (burnout detection):
<1.5microamp
Overvoltage: ±10V differential
Common Mode (Input to Gnd): 1800VDC, max.
Zero and Span Adjustability:
50% of any selected range
Output:
Voltage
Output: 0-5V, 0-10V
Source Impedance: <10 Ohms
Drive: 10mA, max.
Current
Output: 0-1mA, 0-20mA, 4-20mA
Source Impedance: >100K Ohms
Compliance:
0-1mA; 7.5V, max.(7.5K Ohms)
0-20mA; 12V, max.(600 Ohms)
4-20mA; 12V, max.(600 Ohms)
Accuracy (Including Linearity, Hysteresis):
see Table 5
Stability:
+0.04% of the maximum full scale range
per ºC change in ambient temperature,
maximum.
Response Time (10 to 90%):
500mSec., typical.
Common Mode Rejection:
DC to 60Hz: 120dB
Isolation:
1800VDC between input, output & power.
EMC Compliance (CE Mark):
EMC: EN61326-1:2013
Safety: EN61010-2:2013
LED Indication:
INPUT (Green):
continuously on if input is within
selected range, flashes otherwise
TROUBLE (Yellow):
off during normal device operation.
CAL OK (Yellow):
continuously on in normal device
operation
Thermocouple Burnout Detect:
Field configurable upscale, downscale, or
disabled
Humidity (Non-Condensing):
Operating: 15 to 95% @ 45°C
Soak: 90% for 24 hours @ 65°C
Temperature Range:
Operating: 0 to 55°C (32 to 131°F)
Storage: -25 to 70°C (-13 to 158°F)
Power:
Consumption: 1.5W typical, 2.5W max.
Range: 9 to 30VDC
Terminations and Wire:
Screw terminals for 12-22 AWG. Use
twisted pair for output and power
connections.
Weight:
0.54 lbs
Agency Approvals:
CSA certified per standard C22.2, No. 0-M91
and 142-M1987 (File No. LR42272)
UL recognized per standard UL508
(File No.E99775)
CE Conformance per EMC directive 2004/
108/EC and Low Voltage directive 2006/
95/EC.
RoHS Compliant
Ordering Information
Models & Accessories
Specify:
1. Model: G428-0001
2. Accessories: (see Accessories)
3. Optional Custom Factory Calibration; specify C620 with desired
input and output range.
Accessories
All SlimPak "G" series modules will mount on standard TS32 (model
MD02) or TS35 (model MD03) DIN rail. In addition, the following
accessories are available:
HS01 Heat Sink
MD03 TS35 x 7.5 DIN rail
WV905 24VDC Power Supply (0.5A)
H910 24VDC Power Supply (1A)
H915 24VDC Power Supply (2.3A)
MB03 End Bracket for MD03
C664 I/O Descriptive Tag
Printed on recycled pape
Dimensions
Action Instruments
Chessell
Eurotherm
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