Instruction manual

ControlWaveLP Introduction / 1-17
There are 8 LEDs (CR49 - CR56), located adjacent to the DO Terminal Block (TB2). These
LEDs (which can be disabled by a jumper) indicate the status of the logic state of the
Discrete Outputs.
DO Operation Summary
Number of Points: 8 (TB2)
Output Type: Open Drain
Max. Operating Voltage: 38VDC
Max. Operating Frequency: 20 Hz
Sink Current: 100mA Maximum
Electrical Isolation: 1500VDC
Surge Suppression: 500VDC MOV to CHASSIS
38VDC MOV across input
Meets ANSI/IEEE C37.90-1978
Terminations: Pluggable (TB2), maximum wire size is 16 gauge
Status indication: 8 LEDs (one per point) (CR49 - CR56)
Bus Access: 16 Bits Wide
FMI/OB Bd. Analog Inputs
The Analog Input module is composed of signal conditioning circuitry, analog multiplexers
to select the field analog inputs and the reference voltages to the instrumentation amplifier,
an analog to digital converter, opto-isolation circuitry, control circuitry and the bus
interface. The board is designed to support eight (8) 1-5V or 4-20mA isolated inputs or 4-
20mA loops powered from a field source. An isolated DC/DC converter powers the ADC,
instrumentation amplifier and multiplexers. Optocouplers are used for the control circuitry.
The common mode range for the Analog Inputs is 38VDC. The input signals and on board
reference voltages are attenuated with forty to one attenuators. A low pass filter sets the
cutoff frequency to 3 Hz. Analog multiplexers select one of the four channels or the
reference voltages. An instrumentation amplifier converts the differential signal to a single
ended signal and amplifies the signal 10X and is followed by a 4X gain circuit. Four
potentiometers are required to set the 1V and 5V references and to adjust the offset and
gain of the 4X circuit.
A 14 bit Analog to Digital Converter (ADC) is used to digitize the conditioned signals. Op-
tocouplers are used for data and control signals. The serial digitized data is assembled into
a 14 bit parallel value which is placed on the system data bus.
There are eight sets of configuration jumpers (W20A/W20B - W27A/W27B) used to
configure Analog Inputs AI1 - AI8.
AI Operation Summary
Number of Points: 8 (TB3)
Input Configuration: Isolated Voltage Input: 1-5V
Isolated Current Input: 4-20mA
Powered Current Loop: 4-20mA
Accuracy: 0.1% of span @ 25°C
0.2% of span - -20°C to +70°C
0.3% of span - -40°C to +70°C
Isolated Voltage/Current
Common Mode Range: 38VDC referenced to isolated common.