Specifications

298 | OWNER’S GUIDE
HSI-STG-D Cables and Shielding
To reduce the influence of electromagnetic disturbances, shielded twisted pair cables are recommended. Connect the shield to
the isolated GND (Pin4) to get the best result.
The twisted pairs for full bridge, half bridge, voltage and resistance mode are:
Twisted pair 1 EXC+ PIN1 EXC- PIN8
Twisted pair 2 Sense+ PIN6 Sense- PIN3
Twisted pair 3 IN+ PIN2 IN- PIN7
Twisted pair 4 R + PIN5 GND(isolated) PIN4
If TEDS is used also the shield could be used as GNDisolated
For quarter bridge mode:
Twisted pair 1 IN+ PIN2 Sense1 PIN3
Twisted pair 2 R + PIN5 EXC- PIN8
HSI-STG Operation Notes
Free variable gain and excitation
The gain, excitation and offset values of this module are free programmable. So it is possible to normalize any physical sensor
input signal to the ±5V output of the module. By using these settings as power on default, standalone solutions could be easily
realized.
Gain: from 0.5 to 10000. The module input ranges are based on predefined gain values. The module automatically chose the
best gain combination of the internal amplifiers to keep the overall noise and drift as low as possible.
Output offset: Could be programmed from the positive to the negative full scale range except on the input ranges above 1V.
Due to internal structure here the offset could be set from +20 % to – 20 %.
Excitation Voltage: The excitation voltage is programmable from 0 to 12 V in 185 μV steps. Setting the excitation to 0 V for
example allows you to determine the noise of the sensor cabling. The sense terminals have to be connected to the excitation
terminals all the time. Even if the remote sensing is not required.
Excitation current: The current could be programmed from 0.1 mA to 20 mA in 0.3 μA steps. The maximum compliance volt-
age is 12 V. The compliance voltage is automatically balanced around the internal GND. This minimizes the common mode error.
Power On Default function
You can store the latest settings of the module in the internal EE-Prom memory. Once the module restarts, it comes up auto-
matically with these setting. This is important for stand alone applications and for fail-safe reasons.
Filter
The Module has nine selectable low-pass filters from 10 Hz to 100 kHz. The filter characteristic can be set to Butterworth
2nd order or Bessel 2nd order. An additional fixed filter inside this module is a 3rd order Bessel filter with a guaranteed -3 dB
bandwidth of 300 kHz.