KMPS-1-64 Manual
12/18
KM 8000 Rev. A
Page 10 of 40
Copyright © 2018 Kulite Semiconductor Products, Inc.
All Rights Reserved.
2.4
Temperature Output
The temperature is read off of each sensor and then the raw output is converted to
temperature using a second order conversion
T
out
= A
2
*T
2
+ A
1
*T + A
0
This data is available for each sensor using the TEmperature command. The UNits command
automatically switches the temperature between Fahrenheit and centigrade.
UNit PRessure
arg
Sets or returns the pressure units. Valid values for
arg
are PSi or BAr. All
pressure readings will be expressed in this unit.
UNit
TEmperature arg
Sets or returns the temperature units. Valid values for
arg
are C or F. All
temperature readings will be expressed in this unit.
Table 4 : Units Commands
2.5
Analog Output
The analog output is available in Analog Mode. The channel number to output is selected via
the multiplexer pins. These pins are 3.3 volt tolerant and have a weak pull-up to 3.3 volts. A
pin is selected by pulling down to ground. For instance to select channel 3 pins 1 and 2 would
be pulled to ground and 3, 4, 5, and 6 left to float.
The analog output is from 0.5 to 4.5 volts for any channel. For absolute channels 0.5 volts
represents 0 PSIA and 4.5 volts represents the full scale of the channel. For differential
channels 0.5 represents the negative full scale pressure and 4.5 volts represents positive full
scale pressure.
2.6
Trigger
Triggered acquisition allows the user to simultaneously sample data from many scanners at
the same time. The trigger can be activated by bringing the trigger pin low or by sending a
trigger command. In standard trigger mode the data for all 64 channels is immediately output
after acquisition. In the polled trigger mode the data is taken and stored until polled by the
user. This can be useful to avoid data collision on an RS-485 network.
3 Communication
The KMPS digital output can either be RS-485 or Ethernet output. The advantages of RS-
485 are a simpler wiring scheme (2 vs 4 wires) and the ability to connect multiple units together
along a single bus (daisy chaining). Ethernet output has the advantage of being more easily
connected to existing networks.
Most commands are available in RS-485, TCP, and UDP communication. Those that are only
used in one type are listed separately under that protocol.
For RS485 commands are in the form of $AA X where AA is the address of the scanner and
X is the command. Commands can either be sent as the full word or only the first two
characters. There must be at least one space between the address and the command.
Another space is used between the command and each option.
Summary of Contents for KMPS-1-64 Series
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