System Description - PCB Layout
Fusion4 MSC-L Part No.: 4418309_Rev09
3- 28 Installation & Operation Manual
Honeywell
3.6.1.2 CAN-ARM-MSC
3.6.1.2.1 Functions
The function of the CAN-ARM-MSC board is to provide the minimum I/O
functions required for loading and for enhanced additive injection
processes.
The CAN-ARM-MSC board supports both W&M and non-W&M additive
injection and blending processes.
Following are the functions of the CAN-ARM-MSC board.
Function Description
12 Pulse Input DC (Quad PI) circuit Converts pulse signals from external flow measuring devices into
numeric data that can be read by a FlexConn microprocessor.
7 Analog Input (AI 4-20 mA Active/Passive)
circuits
Converts analog signals received from a single external 4-20 mA trans-
mitter into a signal that can be read by the FlexConn microprocessor.
2 Pulse Output DC (PO DC) circuits Converts logic signals from the FlexConn microprocessor into isolated
switched DC signals.
12 Digital Output Solid State Relay AC (DO-
SSR AC) circuits
Converts logic signals from the FlexConn microprocessor into isolated,
high voltage, switched AC signals.
Analog Output (AO 4-20 mA Passive) cir-
cuit
Converts signals from the FlexConn microprocessor into scaled 4-20 mA
analog signals.
2 COMMS circuits (2-wire) The RS-485 serial communication block, which can be configured as a
2-wire circuit, allows the MSC-L to communicate with external devices
through an RS-485 compliant connection.
An ETHER circuit The Ethernet communication block allows the FlexConn microprocessor
to communicate with external devices through an Ethernet physical com-
pliant
layer.
3 Resistance Temperature Detector (RTD
3-wire or 4-wire) circuits
Converts the temperature data from a remotely connected PT100 RTD
into a resistance value that can be read by the FlexConn microcontroller
and then converted back into a temperature value.
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