Resistor Bridge (Strain Gauge) - WAGO 750 Series Manual

38 Process Image
4.2.4

Resistor Bridge (Strain Gauge)

For Strain Gauge (SG) measurements, the I/O module outputs the measured
values as a process value standardized to 25000.
Example: The defined measuring range of −15 mV ... +15 mV corresponds to a
possible process value of −25000 ... +25000.
The voltage values are represented at a resolution that depends on the
measuring range:
• 1 digit per 0.0006 mV (SG – U
• 1 digit per 0.0012 mV (SG – U
• 1 digit per 0.0024 mV (SG – U
• 1 digit per 0.0048 mV (SG – U
• 1 digit per 0.0096 mV (SG – U
• 1 digit per 0.0144 mV (SG – U
• 1 digit per 0.20 mV (SG – U
• 1 digit per 0.20 mV (SG S – U
• 1 digit per 0.40 mV (SG – U
• 1 digit per 0.60 mV (SG – U
in one word (16 bits).
Voltage values below 0 mV are represented in two's complement binary.
The voltage underranges and overranges relate to manufacturer range violations.
Representation in the tables: Corresponding monitoring must be switched
on!
The "Underflow", "Overflow", "Underrange" and "Overrange" areas require that
the corresponding monitoring is switched on (see Section "Diagnostics" >
"Behavior in the Event of an Error").
Manual
Version 1.0.0
750-1491 2AI Resistor Bridge (Strain Gauge)
±15 mV)
d
±30 mV)
d
±60 mV)
d
±120 mV)
d
±240 mV)
d
±360 mV)
d
+5 V internal)
ref
±5 V external)
ref
±10 V external)
ref
±15 V external)
ref
WAGO I/O System 750