Siemens 9410RC User Manual page 115

Inputs / outputs
Analog input behavior
Analog input zero scale and full scale values
Configuring option module analog inputs using ION Setup
7EN05-0336-01
NOTE: When unpowered, your meter's analog inputs act like they are in voltage mode
(high input resistance).
When connected to a current output transducer, this high resistance can create a high
voltage. Standard (i.e., 4 to 20 mA) current transducers have open circuit protection
and are able to handle a high input resistance; however, if non-standard transducers
are used high voltages may be generated. Your meter's analog input has circuitry to
limit this voltage, but it may not be sufficient with a very high-power current source.
EQUIPMENT DAMAGE
Failure to follow these instructions will result in equipment damage.
• Ensure the analog input is configured for the correct voltage or current mode
before connecting or activating the current transducer.
• Do not exceed the device's ratings for maximum limits.
Related Topics
• Specifications
Analog inputs may show a value below zero scale if an open circuit is detected on the
input port.
Configure your analog input's zero and full scale values.
In most cases the output range of the sensor feeding the analog input matches the
hardware limits of your meter's analog input port. In that case, the analog input's zero
scale and full scale values are the same as the sensor's represented range. For
example:
Analog sensor
0 - 50 psi represented by a
4 - 20 mA signal
If the sensor's output range does not match your meter's hardware limits, you must
calculate the full scale and/or zero scale values by analyzing the system.
See the ION Reference, available from www.usa.siemens.com/pds, for detailed
information about the Analog Input module and full scale and zero scale calculations.
You can configure analog inputs using ION Setup.
Analog inputs are available on the optional I/O modules you can connect to the base of
your meter.
Calculate your zero scale and full scale values based on the analog source and the
input range of your meter.
Make sure that the analog input port that you want to use is properly configured and
connected to a valid external analog signal source.
1. Start ION Setup.
NOTICE
Meter's analog input
4 - 20 mA analog input range
9410 series
Analog input values
Full scale = 50 (psi)
Zero scale = 0 (psi)
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