Flash Proms Containing Software For The Main And Communication Processors; Activation Of Power Changeover Circuit; Installation Test Procedure - jotron WP 900 Manual Del Usuario

Installation Guide
T942C- and T942C/2 Central Unit
1.3.16 FLASH PROMs Containing Software for the Main and Communication
Processors
T942C can use software designed for T941C. To enable this backward compatibility,
however, T942C must be equipped with new software, called LBC. For details see Product
News, OSP, System 5000 No 22 - 1988, Central T942C replaces T941C, C941C and CEI.
1 Press the FLASH PROMs containing the software for the main processor onto IC-
sockets IC13 and IC14. If applicable S942 is not available, use available S941
software in IC14 and corresponding LBC software in IC13.
2 Press the FLASH PROM containing the appropriate S942 software for the
communication processor onto IC-socket IC54.

1.3.17 Activation of Power Changeover Circuit

Activate the RAM back-up battery by closing jumper S03 on the circuit board.
Figure 24. The RAM back-up battery.
Note: The power changeover circuit contains a 3V lithium battery. At any interruption in
the ordinary +5V supply, both the RAM and real-time clock will be supplied by the battery
so that they retain their data.
Data
Current consumption, RAM and real-time clock:
• 3 V battery: typical 2 µA, max 40 µA
Battery life (battery connected):
• 5 V not connected: typical 7 years, min. 0.5 years
• 5 V connected: minimum 10 years
Battery life (battery not connected):
• min. 10 years

1.3.18 Installation Test Procedure

For better indication of whether the system is operating properly or not, a PC equipped
with a terminal emulating program can be connected to connector J09 (see 1.3.13
Connection of PC on page 15). Section 1 on switch SW02 must then be set in position
OFF.
2003-01-08 / Rev.C
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