Central Processing Unit (Cpu); Memory; Explosion-Proof Enclosure - Emerson FB1100 Instruction Manual

Emerson FB1100 Flow Computer Instruction Manual
D301752X012
July 2017
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1.3

Central Processing Unit (CPU)

The flow computer's CPU is a NXP
that operates at 4 to 60 MHz depending on the power mode. The CPU runs the Micrium operating
system.
1.3.1

Memory

The flow computer includes both static and flash memory.
Table 1-1: Memory
Memory
8 MB SRAM
128 MB FLASH Holds firmware image and configuration files
1.4

Explosion-proof Enclosure

The FB1100 includes an explosion-proof enclosure. The enclosure consists of the main housing,
two threaded covers, and four conduit entry points.
The four conduit entry points are ¾ in NPT pipe threaded holes that permit entry of field conduit
for I/O and communication wiring. ATEX installations use a ¾ in NPT to M20 thread reducer.
Unused apertures shall be closed with suitable blanking elements.
The FB1100 can operate in an unprotected outdoor environment. Wiring for I/O, communications,
and power enters the enclosure through the four conduit fittings with appropriate protective seals
and connects to the terminal plate.
The front end cap (cover) provides a viewing window for the HMI module. You can access the
terminal plate by removing the rear end cap (cover).
4
Single digital output
Power from a DC power supply, a lithium battery, or an optional lead acid battery/solar
panel combination
Serial communication options for RS-232, RS-422, and RS-485
HMI module with optional display and back light for local operator interaction
Optional Wi-Fi® transceiver (802.11 b/g) for field technician to access the flow computer
from a laptop without physical cable connection
Application software supports AGA3, AGA8, ISO 5167, ISO 6976, and API 21.1 calculations
in either U.S., metric, or other natural gas standard units
Support for one-year autonomous measurement without external power (lithium battery
option)
®
Usage
Holds current states of all variables and historical archives
®
Kinetis K61 series CPU with an ARM
® ®
Cortex M4 processor
Introduction