TD 91684GB
16 April 2015 / Ver. G
Installation Guide
T942C and T942C/2 Central Unit
6
Switches
SW01
Address selector switch for the C-bus. If the setting of SW1 is changed the
Central Unit must be restarted for the change to become effective.
SW02
If the settings of sections 1, 3 or 4 on switch SW2 are changed, the Central
Unit must be restarted for the change to become effective. Section 1 is set to
ON if a PC (connected to connector J09) equipped with PDM or other special
program, is to be used according to the PC line protocol.
If section 1 is set to OFF, a PC equipped with a terminal emulating program
can be used as an aid at the installation test procedure and for service.
Section 2 is used for test pagings (ON = Test pagings on, OFF = Test pagings
off). Section 2 is normally set to OFF.
Section 3 determines if the parameter list is to be read from the non-volatile
memory or from the FLASH PROM (ON = Read from the non-volatile memory,
OFF = Read from the FLASH PROM). Section 3 is normally set to OFF when the
configuration of parameters is done in PCPAR.
Section 4 determines if the non-volatile memory is to be reset or not after
restarting the Central Unit (ON = Reset, OFF = Reset not). Section 4 is normally
set to OFF.
Sections 5 is used for “off licensed mode”.
Sections 6-8 are not used and are set to OFF.
LEDs
LED01A
Green function indicator.
LED01B
Red function indicator.
LED02
BCP communication in progress.
LED03
Paging systems: Synch. data transmission in progress on D-bus.
LED04
Communication in progress between MP and BCP.
LED05
Not used.
LED06
Aux. relay output (on connector J10) is active.
LED07
Not used.
LED08
Indicates transmission to external computer (J09).
LED09
Indicates reception from external computer (J09).
IC-Circuits
IC01
Microprocessor, type 80C188EB.
IC08
Module key.
IC13, IC14
FLASH PROMs, contain the software for IC14: the main processor.
IC22
RAM memory with battery backup.
IC54
FLASH PROM, contains the software for the communication processor.
