Analog Outputs - Siemens 9410 Series User Manual

9410 series

Analog outputs

Analog output applications
Analog output behavior
Analog output zero scale and full scale values
140
Related Topics
• Option I/O modules configuration
You can use an analog output to send a signal to an analog-controlled valve to modify
a water pipe's valve position in order to change the flow rate.
For analog output operation, your meter takes an input value and scales it to the
appropriate signal value to send out the physical analog output port.
Your meter's analog I/O option modules can output either low voltage or current using
standard analog transducers such as 4 - 20 mA current transducers.
Related Topics
• Option modules
Your meter's analog output, once configured, outputs voltage or current signals. If your
meter's analog output source becomes unavailable (N/A) the analog output level
should go to zero (0 V / 0 mA) under most conditions.
When your meter is powered off or configured to send voltage, the meter registers as a
high impedance.
The electrical signal on the analog output is DC; make sure proper polarity is observed
when wiring external devices to the analog output ports.
An unexpected change of state of the analog outputs can result when the supply
power to the meter is interrupted, during an upgrade of the meter's firmware or
framework or option module firmware or a during an option module reset.
UNINTENDED OPERATION
Failure to follow these instructions can result in death, serious injury, or
equipment damage.
Do not use this device for critical control or protection applications where human or
equipment safety relies on the operation of the control circuit.
Configure your analog output's zero and full scale values.
In most cases your meter's analog output range matches the range of the analog
sensors that your meter's outputs are connected to. In that case, your meter's analog
output zero scale and full scale values are the maximum and minimum values of the
source driving your meter's analog output. These values are used to normalize the
source value to a value between 0 and 1 which is applied to the operating range of the
analog output port to determine the analog output current or voltage. For example:
Source value Analog output values
0 to 120 kW range Full scale = 120 (kW)
100 kW
Zero scale = 0 (kW)
Normalized: 0.83
WARNING
Meter's analog output
4 - 20 mA range
Output: 17.28 mA
Inputs / outputs
Analog sensor
4 - 20 mA range
7EN05-0336-03