4 FC1: General Information
4.2 FC1: Hardware
The FC1 flow computer consists of a rack-mountable card cage with an
operation panel on the front side.
At the rear side, the compulsory CPU board additionally offers one network
LAN interface and two serial RS232/RS422/RS485 interfaces (COM ports).
These interfaces are typically intended for the connection of gas quality
measurement devices or other devices equipped with a protocol interface.
Several different I/O boards can be mounted from the rear side. The FC1
device is available in two housing widths, i.e. with a housing width of 1/3 for
up to four process boards or a housing width of 1/2 for up to seven process
boards. The I/O board configuration is variable; Table 6 shows an overview
of all available I/O boards.
In principle, all board types can be mounted in any slot. There is a restriction
for MSER4 and ESER4 boards only: In case of a device with a housing
width of 1/3, only one MSER4 or ESER4 board can be mounted in slot 4.
A device with a housing width of 1/2 can contain up to two boards of MSER4
or ESER4 type (in slot 6 and slot 7).
ExMFE5 * Input board providing 3 NAMUR inputs for status, LF
or HF pulses or encoder index; 1 analog/HART input;
1 Pt100 input. All inputs are intrinsically safe.
Intended for the connection of gas meters (via pulses
or encoder index), pressure transmitters (4 … 20 mA
or HART), temperature transmitters (resistance input
or HART).
MFE7 * Input board providing 3 inputs (24 V DC) for status,
LF or HF pulses or encoder index; 2 analog/HART
inputs; 1 Pt100 input, 1 RS485 serial interface.
Intended for the connection of gas meters (via pulses
or encoder index), ultrasonic gas meters (RS485
serial interface), pressure transmitters (4 … 20 mA or
HART), temperature transmitters (resistance input or
HART).
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