MGP WRM2 Dokumentacja Strona 22

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TelePole WR/ Operating & Maintenance Manual Page 22
7. Electronic Block Diagrams Description
See block & wiring diagram DRW# 12850-50-00.
7.1. Meter
The meter unit includes the CPU and the Power Supply boards.
7.1.1. CPU Board Description
DRW #12850-40-00, PC #1942.
CPU Board Block Diagram
On /Off Circuit (Q3, Q4, Q5)
A momentary short between pin J3/1 and J3/2 switches Q3 and Q4 on.
The battery voltage powers the power supply circuit.
U5/5 is set to 1 (in software), Q3 is switched on, and as a result the meter is turned on.
An additional momentary short between J3/1 and J3/2 sets U5/6 to 0 through Q5. U5/5
is set to 0 and the meter is turned off.
Display
Display
Driver
On / Off
Speaker
CPU
80C32
Communication
EPROM
EEPROM
Touch
Panel
UART &
Communication
Electro-
Luminescence
Extension Card
Decoder
Latch
output
Latch
input
J2
J5
J6
1/2
J4
J3
J1
J6
1/2
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