Amplicon Liveline PC27E, Инструкция по эксплуатации

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Page 12 PC27E
4.6 Input Voltage Range Setting
The analog input voltage range can be set by the position of jumper J1. Table 3 shows the
settings for the PC27E.
J1 JUMPER
POSITION
INPUT VOLTAGE RANGE
PC27
0 to +4v
-2 to +2v
-4 to +4v
UP
BP
No Jumper
TABLE 3 ANALOG INPUT VOLTAGE RANGE SETTINGS
4.6.1 Input Attenuators
Although the PC27E has pre-defined input ranges, these can be modified on a
channel by channel basis to allow higher or intermediate input voltages to be handled.
This is accomplished by drilling out a link from the required channel and inserting
appropriate resistors. Each channel is provided with a position for an input series
resistor and single in-line resistor networks for two groups of eight channels.
PLEASE NOTE. IF PROPERLY UNDERTAKEN, THESE MODIFICATIONS WILL
NOT INVALIDATE THE WARRANTY. NO MODIFICATION SHOULD BE MADE TO
A PC27E UNDER EVALUATION.
QA5, QA7
INPUT
MULTIPLEXERS
RN4, RN5
RN2, RN3
Vin
PC27E
SK1
The links corresponding to each input channel are as follows, and can be located using the
diagrams shown in figures 7 and 8, the printed circuit board layouts.