Instruction manual

ControlWaveLP Introduction / 1-15
1.3.3 The Fixed Multifunction Input/Output Board (see Figure 1-2)
The Fixed Multifunction Input/Output Board (FMI/OB) is a multilayer board that measures
approximately 8.5” wide by 11” long. FMI/OBs contain a PC/104 interface, four I/O modules,
electrical isolation to field devices, surge suppression, pluggable terminations, and status
LEDs for Discrete I/O, CPU, and communication functions. The four I/O modules provide
the following general field interfaces:
● 16 Discrete Inputs
● 8 Discrete Outputs
● 4 High Speed Counters
● 8 Analog Inputs
There are eight (8) pluggable terminal blocks for the four (4) fixed I/O modules and four (4)
expansion I/O modules. Four (4) mass termination connectors (P3, P4, P5 & P6) are
provided to interconnect the 4 expansion I/O modules to the pluggable terminators (TB5,
TB6, TB7 & TB8 respectively). A PC/104 bus connection (P1 & P2) provide access to the
fixed I/O and the expansion I/O. A Power Supply Sequencer Board (PSSB) interface
connector (P9) is provided on the bottom of the FMI/OB Board. Four sets of mounting post
are provided for expansion I/O LED Boards.
Pluggable terminations are 3.81mm on center. There is a maximum of 32 points per I/O
subsystem. Terminations are arranged in two groups (16 + points & 16 - points).
A 104-pin PC/104 bus interface, composed of 64-pin connector P1 and 40-pin connector P2
interconnects the fixed and expansion I/O subsystems. Mounting posts are provided to
support the first I/O expansion card. Four 40-pin expansion connectors (P3 - P6) are
provided. Connectors P3, P4, P5 and P6 are electrically connected to connectors TB5, TB6,
TB7 and TB8 respectively. Each connector is provided with a pluggable 32 point Terminal
Block that supports a maximum wire size of 16 gauge.
68-pin connector P7 and P10 accommodate the interface (power and signal) between the
FMI/OB and the CPU Boards. These connectors contain the PC/104 signals, the CPU status
and Comm. status LED signals, and the MC, PFIN and WDOG signals.
The FMI/OB has four mounting holes that accommodate panel mount/electrical connection
to the chassis. Six mounting holes accommodate mounting the CPU Board beneath the
FMI/OB Board. The top of the FMI/OB Board is notched to accommodate the PSSB’s
connectors TB1 & TB2 and switch SW1. Two (2) screw slots are provided on the FMI/OB
Board to accommodate mounting the PSSB Board. The PSSB Board mounts beneath the
FMI/OB Board (between the CPU and FMI/OB) and is stood-off from the edge of the
FMI/OB Board with 3/8” stand-offs.
An external battery monitor is composed of an analog to digital converter and a bus
interface. The bus interface is located on the FMI/OB. The analog-to-digital converter, opto
couplers and support circuitry are located on the Power Supply Sequencer Board (PSSB).
The signals EXTBAT_CLK, EXTBAT_DOUT, and EXTBATCE interface to the optocouplers
via the PSSB connector P9. The power Supply sequencer circuit resets the CPU Board at or
below 10.9V for a +12V system or 21.5V for a +24V system.
Two on-board Field Power Supplies are provided; one for DI and HSC operation and one for
AI operation. These supplies operate from a 10.6 to 30 Vdc input. The output voltages are
electrically isolated (500Vdc) and are regulated at 24V ±5% (i.e., 22.8V to 25.2V) (10mA to