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TelePole WR/ Operating & Maintenance Manual Page 24

Input Signals

0 - U9/3 MODE push-button

1 - U9/4 RESET push-button

2 - U9/7 LIGHT push-button

3 - U9/8 low battery

4 - U9/13 not in use

5 - U9/14 calibration mode

6 - U9/17 internal geiger (optional)

7 - U9/18 PC communication

Touch Panel

The touch panel push buttons are connected to the micro-controller chip in the CPU

board via input latch, except the on/off push-button that is connected to the on-off

circuit.

Display (U17, U18)

DRW # 12850-40-00 sheet 2.

The display shows the meter readings and messages.

The display driver (U17) receives clock and serial data from the CPU and transmits it in

parallel to the display in three back planes.

U18 - Rotem’s custom display especially designed for the RAM ION and Telepole

meters. The display includes 3-character 7-segment, 2 decimal points, bar graph and data

segments.

Electro-luminescence (EL, T1, Q1, Q6)

Pressing the LIGHT push-button turns on the display illumination.

U3/6 is set to “1” and activates T1 that supplies 100V AC.

EPROM Circuit (U2, U5) & Extension Card

U2 - 74HC 373, Address A

- A

, latch from AD

- AD

U5 - 27C 256, EPROM contains software code.

The extension card, DRW # 12850-41-00, is installed on the EPROM socket.

The extension card includes EPROM, NOVRAM, Reset and Watchdog circuit.

U2 - NOVRAM: DS1243 8K byte, or DS1244, 32K byte.

The NOVRAM contains: SRAM, clock, calendar and battery back up, used for storing

the SMARTS data.

U3 - MAX1232, watchdog and reset circuit. The micro-controller receives a reset signal

in two cases:

a. When the meter is turned on.

b. In case of software failure.

Pulses are sent from U6/2 to U3/7 as long as operation runs ok. In case of a fault

detection in software, the pulses stop and a reset signal is obtained on U3/6.

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MGP WRM2 Spezifikationen Seite 24