Siemens SITRANS FUH1010, Product Instruction Manual, Page: 106 / 264

Functions
7.6 Expanded I/O Option
FUH1010 IP65 NEMA 4X Precision Volume
Operating Instructions, 01/2013, A5E32122003-AA
105
Expanded I/O Module Option
The Expanded I/O Module Option provides expanded Io analog outputs. It is implemented
through the use of a 1010N-7 Expanded I/O Module occupying the same position as the
1010N-2 I/O Module. This option allows users to drive up to four additional 4-20mA loop-
powered instrumentation outputs.
Note
The flow meter menu does not indicate that these supplementary outputs are present and
available. The outputs, in addition to being loop-powered, are isolated from one another as
well as the flow meter.
Expanded I/O Module Option Identification
To verify that your flow meter has the Expanded I/O Module Option installed check the
following:
The designation C should be part of the flow meter MLFB part number.
For example: 7ME36003C...
1010N-2 I/O Module
The conventional 1010N-2 I/O module provides the following:
●
Two self-powered, isolated 4-20mA current loops (signals Io1 and Io2) that are
assignable and spannable by the user to many flow meter variables such as flow, sonic
velocity, signal strength, etc. These self-powered outputs also provide an industry-
standard fault indication by dropping to 2mA if assigned to flow rate and under fault
conditions. Note that these outputs, though isolated from the system, are NOT isolated
from each other.
● Two 0-10 VDC outputs (signals Vo1 and Vo2) that are also assignable and spannable by
the user as above. These are also self-powered, but are not isolated from the system.
● Two 0-5000 Hz Pgen signals (Pgen1 and Pgen2) also assignable and spannable by the
user. These are TTL level pulses.
The 1010N/DN class of flow meters has a total of six analog outputs as indicated above. In
addition (refer to Installation Drawings 1010N-2-7 and 1010N-7-7):
●
Alarms/Status/Totalizer pulses are generally presented as relay closures as either
Mercury Wetted Form 1A or Dry Reed Form C relays.
● Analog inputs, when provided, are in the form of 4-20mA non-isolated inputs.
● The meter also has four non-isolated Totalizer command lines providing Totalizer Clear
and Totalizer Hold (NoTot) functionality.