Instruction 5700-9001
GDA-1600 16-Channel Controller
35
Inputs may also be configured to accept 4-20mA signals, allowing mixing RTD sensors
and current loops into the same board. Two jumpers per channel determine either a RTD
or 4-20mA input. These dual position jumpers, JP1 – JP16, must both be placed into the
UP position for RTD inputs or both in the DOWN position for 4-20mA inputs (see Figure
4.6).
Channels receiving input data from this board should have the
Data From:
menu set for
Sensor
as described in section 3.2.4. This activates
Cal Mode
menus, described in
section 3.2.9, needed to perform
zero
and
span
calibrations of RTD sensor readings.
Each channel must be calibrated individually by either simulating desired zero/span
calibration resistance values or by placing the channel’s RTD into an actual precision
temperature generator. Ice water is an acceptable method for generating the 0°C zero
temperature value. Upscale span values are best simulated with an RTD calibrator.
Since RTDs are stable and repeatable of over long time periods calibrations normally
only need to be performed upon initial installation. Since the PCB has 8 channels, two
are required for 16 channel applications. JP25 configures inputs for channel groups 1-8
or 9-16.
4.2.6 Optional 4-20mA
Analog Output Board
#
5700-0005
An optional 10 bit 4-20mA analog output board, shown in Figure 4.7, may be connected
to the I
2
C bus. Each channel’s output will transmit 4mA for 0% readings and 20mA for
100% readings. Loop drive capability depends upon the level of the GDA-1600’s
primary DC power supply. With at least 20 volts DC primary power they are capable of
driving 20mA through a 750 Ohm load. Outputs are self powered and DC power should
not be provided by the receiving device.
NOTE:
This PCB requires nominal 24VDC power be connected to TB2 terminals 1 & 2
as shown in Figure 4.7. Suitable power is available from the GDA-1600 Main
I/O board’s TB2 terminal 10 & 12 (see Figure 4.2).
Since the PCB has 8 channels, two are required for 16 channel applications. JP1
configures the outputs for channels groups 1-8 or 9-16.
Содержание GDA-1600
Страница 12: ...GDA 1600 16 Channel Controller Instruction 5700 9001 12 Figure 3 1 Channel Configuration Menus ...
Страница 21: ...Instruction 5700 9001 GDA 1600 16 Channel Controller 21 Figure 3 10 Configuration Menus ...
Страница 28: ...GDA 1600 16 Channel Controller Instruction 5700 9001 28 Figure 4 2 Main PCB ...
Страница 36: ...GDA 1600 16 Channel Controller Instruction 5700 9001 36 Figure 4 7 Analog Output Board ...
Страница 38: ...GDA 1600 16 Channel Controller Instruction 5700 9001 38 Figure 5 2 System Diagnostic Options ...
Страница 53: ...Instruction 5700 9001 GDA 1600 16 Channel Controller 53 ...
