Weidmuller G448 User Manual

Weidmuller Ltd.
10 Spy Court
Markham, ON L3R 5H6
Tel: [phone]
Fax: [phone]

Weidmuller Inc.
821 Southlake Blvd.
Richmond, VA 23236 U.S.A.
Tel: [phone]
Fax: [phone]

ISO 9001 Registered

Electronic Interface Modules

G448 Ultra SlimPak®

Bridge/Strain Gauge Input,
Field Configurable Input Isolator

• field configurable via DIP switches for different input­output combinations

• provides an isolated, DC output in proportional to a
bridge/strain gauge input

• adjustable bridge excitation 1 to 10V with up to
120mA drive

• 11 field configurable input ranges from ±10mV to
±200mV (0.5mV/V to >50mV/V)

• 5 field configurable output ranges 0-5V, 0-10V, 0-1mA
0-20mA and 4-20mA

• flexible power supply accepts 18 to 30Vdc

• ASIC technology for high reliability

• 3 port isolation 1800Vdc between input to output
power

• CSA approved, UL recognized, CE marked

Description

Application

Diagnostic LEDs

The Ultra SlimPak 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 offers 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, 0-20mA or 4-20mA.
This flexibility, combined with an adjustable (1 to 10Vdc) bridge ex-citation source, provides the user a
reliable, accurate instrument to isolate and condition virtually any bridge or strain gauge input.

The Ultra SlimPak G448 field configurable, bridge input signal conditioner is useful in isolating ground loops
and interfacing bridge sensors to data acquisition and control systems.
Three way isolation 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.
High density DIN rail mounting offers an extremely compact solution for saving valuable panel space.

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. If this continues to occur, you may wish to
change your full-scale input range setting.

Table 3:
Bridge excitation
selector-switch settings

Table 2:
Direct or reverse
operation setting

Table 1:
Input range selector­switch settings

Table 4:
Output range
selector-swtich
settings