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.
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