Emerson Edition 4 Manuel D’Utilisation
3-3
Rosemount Tank Radar REX
Chapter 3 Description of 3900 REX
Installation Manual
308014EN, Edition 4
May 2013
May 2013
3.1.2
Analog Processing Card - APC
The APC is used for filtering and multiplexing of analog input signals. By
keeping the analog circuitry on a separate card a high Signal to Noise
Ratio is achieved.
keeping the analog circuitry on a separate card a high Signal to Noise
Ratio is achieved.
3.1.3
Transmitter Interface Card - TIC
The Transmitter Interface Card (TIC) is required for intrinsically safe
auxiliary inputs. The TIC includes:
auxiliary inputs. The TIC includes:
•
Two supply zener barriers and two return zener barriers for 4-20
mA current loops.
mA current loops.
•
One supply zener barrier for a Slave Data Acquisition Unit or a
Remote Display Unit.
Remote Display Unit.
•
Signal/supply connection for optional Temperature Multiplexer
Card (TMC).
Card (TMC).
3.1.4
Temperature Multiplexer Card - TMC
The Temperature Multiplexer Card (TMC) is used to connect up to 6
temperature sensors. Both spot and average sensors are supported.
temperature sensors. Both spot and average sensors are supported.
3.1.5
Relay Output Card - ROC
The Relay Output Card (ROC) contains two relays. It allows controlling
external devices such as valves, pumps, heating coils, overfill protection
according to TÜV etc.
external devices such as valves, pumps, heating coils, overfill protection
according to TÜV etc.
3.1.6
Field Communication Card - FCC
The Field Communication Card (FCC) handles communication with
external devices. There are different versions of the FCC card allowing
you to use various types of communication protocols and even emulate
other types of gauges.
external devices. There are different versions of the FCC card allowing
you to use various types of communication protocols and even emulate
other types of gauges.