Chapter 5: Troubleshooting
63
WARNING
Test Voltages
See Tables 5.2 and 5.3 for voltage supplies generated in the Battery Charge Controller Circuit Board, and
see Figure 5.1 for transmitter test points on the main circuit board. Voltage should be measured between
the ground connector (“Gnd”) and the following test pins.
WARNING –
TO PREVENT DAMAGE TO THE CIRCUIT BOARD, DO NOT SHORT PINS
TOGETHER.
Table 5.2 –Voltage Generated by Power Supplies
Supply
Voltage
Description
Vcc
5V ± 5%
Powers computer & interface circuitry.
V
PP
0V
Flash memory programming supply, 5V when flashing RTU
V
PR
*
5V ± 5%
Output of switching regulator powers computer and supplies 3.3V regulators
V
MSP
3.3V ± 3%
3.3V supply for the MSP430, even with power off
V
CC
5.5
5.5V ± 10%
Analog supply for A/D system, if Analog and/or RTD inputs are present
V
BB
5V ± 5%
Powers NVRAM and real time clock, ~3V when not powered
V
CC
3
3.3V ± 3%
Powers 3.3 volt circuits including MVTs
V
LCD
5V ± 5%
Power for LCD display, only when display is on.
* Class I, Div. 2 with integral 6V or 12V battery charge controller
Table 5.3 –Voltage Generated by Control Signals
Signal
Voltage
Description
IBKL*
0.95 to 2 V
Constant current control when the LCD backlight is on. 5V when backlight off
PFIB
AT
>
1.23V
Power Fail detector for 6V battery systems, shuts down RTU when PFIB
AT
and
PFIP
WR
are less than 1.23V.
R
ESET
N 5V
C
MOS
System active low reset signal.
32K
HZ
0-5V C
MOS
square wave
32.768 KHz real-time clock oscillator output
PFIP
WR
* >
1.23V
Power Fail detector for 12V battery system, shuts down RTU when PFIP
WR
is
less than 1.23V (i.e. when Power+ and are below ~9V).
MSPR
ST
3.3V
C
MOS
MSP430 active low reset signal.
* Class I, Div. 2 with integral 6V or 12V battery charge controller
Summary of Contents for NUFLO 1141C
Page 1: ...Manual No 30165009 Rev 01 NUFLOTM Scanner 1141 RTU Hardware User Manual ...
Page 28: ...Scanner 1141 Hardware User Manual 28 Figure 3 1 Scanner 1141 main circuit board ...
Page 66: ...Scanner 1141 Hardware User Manual 66 ...
Page 67: ...Chapter 6 Parts List and Order Code 67 Chapter 6 Parts List and Order Code Scanner 1141C ...
Page 68: ...Scanner 1141 Hardware User Manual 68 Scanner 1141L ...
Page 69: ...Chapter 6 Parts List and Order Code 69 Scanner 1141G ...
Page 91: ...Appendix A Specifications 91 Outline Dimensions Scanner 1141C ...
Page 92: ...Scanner 1141 Hardware User Manual 92 Scanner 1141L Front and Side Views ...
Page 94: ...Scanner 1141 Hardware User Manual 94 Scanner 1141G ...
Page 96: ...Scanner 1141 Hardware User Manual 96 Drawing 1 Installation ...
Page 97: ...Appendix B Control Drawings 97 Drawing 2 Power Supply ...
Page 98: ...Scanner 1141 Hardware User Manual 98 Drawing 3 Communications Serial Ports ...
Page 99: ...Appendix B Control Drawings 99 Drawing 4 Status Pulse Inputs Outputs ...
Page 100: ...Scanner 1141 Hardware User Manual 100 Drawing 5 RTD Inputs Analog Inputs Outputs ...
Page 101: ...Appendix B Control Drawings 101 Drawing 6 Analog Outputs ...
Page 102: ...Scanner 1141 Hardware User Manual 102 ...
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