ABB TZA 4 Mode D'emploi page 9

Fig. 7 Mains card
Si 2.1 Mains fuse
Fig. 6 Motherboard
1.1 Power supply unit connection
1.4 Jumpers (for loading the EPROMs) 1.5
1.7 Connection of the expansion module 1.8 Input jumpers
1.10 RAM
42/18-40 XL TZA 4, Digital computer / Calculateur de mesure numérique
4.2.1 Motherboard
The entire processing electronics (without power supply unit) is
located on the motherboard.
The input jumpers (1.8) can be plugged in and correspond to
the type and number of the inputs (see commissioning,
Section 6).
An expansion module (4) which is fitted must be removed in or-
der to replug the jumpers.
The serial interface (1.11) is, depending on the order, connec-
ted at the factory by means of solder links. It can be altered on
removing the mains card (2) (4 screws) e.g. from RS-232 C to
RS-422 (see Section 4.3.3).
The latter applies when converting from EPROM 1 (1.5) to
EPROM 2 (1.6).
The 32-pole blade connector (1.9) features design D or F.
4.2.2 Mains card
The mains card (2) is available in the versions:
230 V AC
115 V AC
24 V UC
Access is gained to the mains fuse Si2.1 (see Section 5.2.1 for
data) on removing the mains card from the motherboard.
Potentiometer P 2.1 and jumpers Br 2.1 and Br 2.2 are set by
an internal factory adjustment and may not be changed (voltage
adjustment).
1.2 Crystal unit
EPROM 1 (operating system) 1.6 EPROM 2 (computation programs)
1.11 Serial interface
1.3 Microprocessor
1.9 Blade connector
3.3 Interface connector
9