Eurotherm G448-0002 Data Sheet

G448-0002

ULTRA SLIMPAK

®

G448-0002

Bridge Input Field Configurable Isolator

Provides an Isolated DC Output

in Proportion to a Bridge/Strain Gauge Input

 Adjustable Excitation 1 to 10V with up to 120mA drive
 Field Configurable Inputs from 10mV to ±200mV

(0.5mV/V to >50mV/V)

 Field Configurable Outputs:

0-5V, 0-10V, 0-1mA, 0-20mA and 4-20mA

Description

The G448 is a DIN rail mount, bridge or strain gauge input signal
conditioner with 1800VDC isolation between input, output and
power. The field configurable input and output offer flexible, wide
ranging capability for bridge or strain gauge input applications
from 0.5mV/V to over 50mV/V.

Wide ranging, precision zero and span pots allow 50% adjustablity
of offset and gain within each of the 11 switch selectable input
ranges. The output can be set for either 0-5V, 0-10V, 0-1mA, 0­20mA or 4-20mA.

Application

Three way isolation in the G448 completely eliminates ground
loops from any source. Isolation protects expensive SCADA
systems from ground faults and provides filtering for noise
reduction which can be a significant problem with small, millivolt,
bridge signals. Wide ranging flexibility allows the user to easily
zero out dead-loads in weighing systems or configure bipolar
input ranges for expansion-compression or vacuum-pressure
bridge applications.

Diagnostic LED

The G448 is equipped with a dual function LED signal monitor. The
green, front mounted LED indicates both DC power and input
signal status. Active DC power is indicated by an illuminated LED.
If the input signal is more than 110% of the full scale range, the LED
will flash at 8Hz. Below -10%, the flash rate is 4Hz.

 Ultra Slim Housing for High Density Installations
 Flexible Power Supply Accepts 9 to 30 VDC
 ASIC Technology for Enhanced Reliability
 RoHS Compliant

Configuration

The G448 has 11 input range switch settings. Trim potentiometers
allow 50% input zero and span adjustablity within each of the 11
full-scale, input ranges.

For example, the 200mV switch setting in Table 1 configures the
input for a 0 to 200mV range. Since the span can be contracted
by 50%, this enables an input span as narrow as 100mV of the
range, or 50%. This span can be positioned anywhere within the
0-200mV range with a zero off-set as large as 50% of the full scale
range (e.g. 100 to 200mV input).

Unless otherwise specified, the factory presets the Model G448 as
follows:

Input Setting: 0 to 50mV

Input Range:

Excitation: 10V

Operation: Direct

Output: 4 to 20mA

The DC power input accepts any DC source between 18 and 30V,
typically a 24VDC source is used (see Accessories).

For other I/O ranges refer to Tables 1 through 4 and reconfigure
switches SW1 and SW2 for the desired input range, function,
excitation and output range.

WARNING: Do not change switch settings with power applied.
Severe damage will result!

0 to 30mV (3mV/V)

Calibration

1. After configuring the DIP switches, connect the input to a
calibrated millivolt source. Connect the output to the device (or
a load equivalent to the device) and apply power. (see Wiring
Diagram, Figure 2 or 3).

Note: To maximize thermal stability, final calibration should be
performed in the operating installation, allowing approximately 1
to 2 hours for warm up and thermal equilibrium of the system.

Excitation (+)

Bridge (+)

2. Set the calibrator to the desired minimum and adjust the zero
potentiometer for the desired minimum output.

3. Set the calibrator to the desired maximum and adjust the span
potentiometer for the desired maximum output.

4. Repeat steps 2 and 3, if necessary for best accuracy.

Table 1: G448 Input Ranges

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tupnI

egnaRegnaR

egnaRegnaR

egnaR

12 34 5



Vm01ot0

 

Vm02ot0



Vm05ot0



Vm001ot0



Vm002ot0



Vm5ot5-



Vm01ot01-



Vm02ot02-



Vm05ot05-



Vm001ot001-



Vm002ot002-

Table 2: G448 Direct

or Reverse Operation

noitarepO

esreveR

:yeK  desolCroNO=1=

Excitation (-)

Bridge (-)

1WS

6

tceriD



Table 3: G448 Bridge

Excitation Settings

egdirB

noitaticxEnoitaticxE

noitaticxEnoitaticxE

noitaticxE

V1.01ot8.9

V2.5ot8.4

V01ot0

V5.2ot0

:yeK  desolCroNO=1=

1WS

78







Table 4: G448 Output Settings

tuptuO

12345678



V5+ot0



V01+ot0

Am1ot0

Am02ot4

Am02ot0

:yeK  desolCroNO=1=



  

2WS



Figure 1: G448 Factory Cal: 0 to 30mV (0 -50mV Switch Settings)

10V Excitation, Direct Operation, 4-20mA Output

Figure 2: Wiring Diagram for G448-0001/0002

(-0001 for reference only, not an active product)

Figure 3: Wiring Diagram for G448-0000

(for reference only, not an active product)

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 4: Mounting Multiple Modules

Specifications

r

Input:

Voltage:

Full Scale Range: 10mV to ±200mV (Table 1).
Impedance: >1M Ohms
Overvoltage:

intermittent 400V, max.;
continuous 264V, max.

Common Mode (Input to Ground):

1800VDC, max.

Zero Turn-Up:

50% of full scale range

Span Turn-Down:

50% of full scale range

Operation:

direct or reverse acting

Output:

Voltage:

Output: 0-5V, 0-10V
Impedance: <10 Ohms
Drive: 10mA, max. (1K Ohms, min. @ 10V)

Current:

Output: 0-1mA, 0-20mA, 4-20mA
Impedance: >100K Ohms
Compliance:

0-1mA; 7.5V, max.(7.5K Ohms, max.)
0-20mA; 12V, max. (600 Ohms, max.)
4-20mA; 12V, max. (600 Ohms, max.)

Bridge Excitation:

1 to 10VDC, 120mA max.

Accuracy (Including Linearity, Hysteresis):

±0.1% typical, ±0.2% maximum of selected

input range at 25°C.
Stability:
±0.025%/°C typical, 0.05%/°C maximum, of

selected full scale input range.

Output Noise (maximum):

0.1% of span, rms, or 10mV whichever is

greater.

Response Time (10 to 90%):

<200mSec., typical.

Common ModeRejection:

DC to 60Hz: ³120dB, ³100dB for 0 -1mA range

Isolation:

1800VDC between input, output & power.

EMC Compliance (CE Mark):

EMC: EN61326-1:2013
Safety: EN61010-2:2013

LED Indication (green):

Input Range (approx.)
>110% input: 8Hz flash
<0% input: 4Hz flash

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:

2.5W typical (one 350 Ohm bridge),
4W max. (four 350 Ohm bridges).

Range: 18 to 30VDC

Weight:

0.54 lbs.

Wire Terminations:

Screw terminals for 12-22 AWG

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: G448-0002

2. Accessories: (see Accessories)

3. Optional Custom Factory Calibration; specify C620 with desired

input and output ranges.

Accessories

Slim Pak “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 (0.5 Amp)

H910 24VDC Power Supply (1 Amp)
H915 24VDC Power Supply (2.3 Amp)

MB03 End Bracket for MD03

C664 I/O Descriptive Tags

Printed on recycled pape

Dimensions

Action Instruments

Chessell

Eurotherm