OVERVIEW
WBPEEUI240756A0
1 - 1
SECTION 1 - INTRODUCTION
OVERVIEW
The IMFEC12 High Level Analog Input (FEC) module inputs 15
channels of analog signals only to the multifunction processor
(MFP) or multifunction controller (MFC) module.
The IMFEC11 High Level Analog Input (FEC) module inputs 15
channels of analog or frequency shift keyed (FSK) digital sig-
nals to the MFP or MFC module. The IMFEC11 module per-
forms all the functions of the IMFEC12 module and also
provides communication with the Bailey-Fischer & Porter line
of FSK digital smart transmitters and other smart devices in a
field bus or point-to-point configuration.
Figure
shows how the FEC module fits within the INFI 90
OPEN system.
INTENDED USER
Installation and application personnel should have a solid
background in electronic instrumentation and process control.
They should be familiar with proper grounding and safety pro-
cedures for electronic instrumentation. Operators should have
a knowledge of the process and should read and understand
this instruction before placing the module in operation.
HARDWARE DESCRIPTION
The FEC module is an intelligent module, with on-board micro-
processor, memory, analog-to-digital converter and communi-
cation circuitry. The module is a single printed circuit board
that occupies one slot in a module mounting unit (MMU). Two
captive latches on the module faceplate secure it to the module
mounting unit.
The module has three card edge connectors for external signals
(transmitter inputs and communication), system communica-
tion (I/O expander bus) and power. The module receives input
through a cable connection to a termination unit (TU) or termi-
nation module (TM). Wiring from the field devices connect to
terminal blocks on the termination unit or termination mod-
ule. The IMFEC11 circuit board has 18 jumpers; three jumpers
that allow selecting the mode of operation and communication
(J2, J3 and J4) and 15 jumpers that select voltage/current
input (J6 through J20). A dipswitch setting (S1) holds the I/O
expander bus address of the module.