Instruction manual

1-16 / Introduction ControlWaveLP
full load). Output current is rated at 200mA maximum. Supply shutdown is Jumper
selectable. The total power consumption (from 5Vdc) for the FMI/OB Board is 300mW
maximum.
1.3.3.1 FMI/OB Board Fixed I/O Subsystem
The FMI/OB Board contains the 4 fixed I/O subsystems. These are discussed below.
FMI/OB Bd. Discrete Inputs
Discrete Inputs feature optical isolation and surge suppression, the input range is 12 or 24
VAC or VDC ±10%. 1 millisecond or 30 millisecond DI filtering is offered and is factory
configured. The inputs can be configured for isolated or dry contact operation. A 24V DC/DC
field power supply is available to power the dry contact configurations. The power supply
can be disabled via a jumper. There are two rows of terminals. The upper row of terminals
is assigned +DI connections while the lower row is assigned -DI connections. The DI
configuration jumpers should be placed in their ‘A’ position when field powered for dry
contact operation or their ‘B’ position when configured for isolated operation.
FMI/OB interrupt generation circuitry sequentially scans the conditioned DI signals and
generates an interrupt on a change of state provided that the mask bit for the specific input
has been enabled. When an interrupt is generated, the internal scanning circuit stops at
the DI that generated the interrupt. During an interrupt service routine, the number of the
DI that generated the interrupt is outputted on the data bus on data lines DB11-DB8
(MSB-LSB). DI1 = 0, DI2 = 1,…DI16 = 0F hex.
There are 16 DI LEDs (LED CR33 - LED CR48) which can be disabled/enabled with a
jumper (W17). The LEDs are situated adjacent to the DI subsystem Terminal Block (TB1).
DI Operation Summary
Number of Points 16 (TB1)
Input Voltage Range: 12V or 24V
Input Filtering: 1 millisecond or 30 milliseconds
Input Configuration: Contact Closure, externally sourced on a point by point basis -
Jumper configurable
Input Current: 2.5mA ±10%
‘1’ State Voltage: 90% of input voltage range
‘0’ State Voltage: 10% of input voltage range
Interrupt generation: On change of state transition on a point by point basis
Bus access: Sixteen bit wide
Electrical Isolation: 1500VDC
Surge Suppression: 500VDC MOV to CHASSIS
38VDC MOV across input and to FIELD COMMON
Meets ANSI/IEEE C37.90-1978
Terminations: Pluggable (TB1), maximum wire size is 16 gauge
Status Indication: 16 LEDs (one per point) (CR33 - CR48)
FMI/OB Bd. Discrete Outputs
The 8 Discrete Outputs utilize Solid State Relays capable of handling 100mA @ 35V. Surge
suppression is included.