Instruction Manual

Introduction CP372
Page 1 - 10 © 2002 Kontron Modular Computers GmbH ID 25780, Rev. 01
25780.01.VC.021121/111237
P R E L I M I N A R Y
Table 1-4: CP372 Analog Output Specifications
TYPE DESCRIPTION
Output Types / Ranges VOLTAGES: Unipolar: 0 to 15V
0 to 10 V
Bipolar: ± 15V
± 10 V
(Note: Maximum output current for
analog voltages is 5 mA per
channel.)
CURRENT: 0 to 20 mA
(Note: Requires V
ext
for generation.)
V
ext
This external source voltage is required for the generation of analog current
outputs. The V
ext
requirement for each output channel is a function of the
application and is dependent upon the channel source resistance (R
s
). As
such it is possible for each channel of analog current output to have a different
V
ext
requirement.
The absolute specification for a given V
ext
is:
28.0 VDC maximum
6.0 VDC minimum
whereby the actual minimum source voltage required must be determined
based on the actual source resistance. The minimum source voltage indicated
above is required to ensure full scale, 0 to 20 mA, operation.
It is imperative that the application complies with the above specification, oth-
erwise, the CP372 may be damaged or fail to function properly.
For more information refer to chapters 2 and 4.
Channels Standard: 8 channels total
(two clusters of 4 channels each)
Optional: 4 channels total (one cluster of 4 channels)
Channel Connections 8 dedicated connector pins for voltage outputs; 8 dedicated connector pins for
current outputs; 8 analog ground pins distributed over the connector; 4 dedi-
cated pins for common tie points for external source voltages (V
ext
) for current
outputs; and 2 pins for external cluster enable/disable control.
Conversion Continuous serial sampling of the digital 16-bit output words (2 bits address
and 12 bits data) per cluster from the DAC ProComm Controller available for
the DAC (digital serial interface).
The digital to analog converter generates four voltage outputs and updates the
outputs simultaneously.
The initial analog signal value of each output channel after power on is 0V.
Throughput Rate 31.25 kHz per channel
Resolution 12-bit
Accuracy See table 1-5
Output Protection 8 kV ESD; short circuit; and EMI filtering
Isolation 2 kV process to system