West Control Solutions SG 45 - Manual (Page 23)

. 6 Functions
The signal data flow of transmitter SG 45 is shown in the following diagram:
6.1 Measuring input INP
Measuring range Configuration S.tYP
0.5 mV/V (5 mV) 60
1 mV/V (10 mV) 61
2 mV/V (20 mV) 62
4 mV/V (40 mV) 63
Input for bridge circuit (3 possibilities):
· Bridge supply + mV input (4-wire)
· Bridge supply + mV input + Sense input (for measuring the bridge voltage applied to the sensor) (6-wire):
· Bridge supply + mV input + calibration output (for defined change of the bridge resistance): Using a built-in switch, a
known resistor is switched in parallel to one of the 4 bridge resistors, configurable via CAL..M.
+
Automatic 4 or 6-wire detection after start-up
Automatic detection, if the sense signal is connected: This function is active during start-up (after switch-on or re-con -
figuration).
See circuit example on page 9.
+
Due to 6-wire connection, errors caused by voltage drops on the supply leads are prevented.
Functions
SG 45 Measuring input INP 23