Q.series
Gantner Instruments GmbH
21
4 Connecting the modules → Connecting the base
4 Connecting the modules
This chapter contains the description of the connection variants
and pin assignments.
4.1 Connecting the base
The base is used for supplying the current and voltage to the
module, for synchronization and for the transfer of data. The
module is also electrically connected to the mounting rail (DIN
35 mm rail according to DIN EN 60715) by means of a metal
spring i
n the base. In addition, you can activate the terminating
resistances for the interface at the end of the cable, save the
module configuration in the base and define the restoration of
this configuration when inserting a new module.
First, set the DIP switches in the base to the required position
(4.1.2 to 4.1.3). Then plug the base on and push on further bases
from the right (4.1.4). The power is supplied from the left side
which also provides a direct connect
ion to the PC or PLC if you
are not using any Q.gate or Q.pac.
The end of the interface line must be terminated with two resis-
tances. Otherwise reflections occur on the line and lead to distur-
bances, even to the loss of data
transmission. Refer to
Section 4.1.3, Activating the terminating resistances, page 24.
You can operate the bases in various modes:
• Unconfigured, i.e. the modules are fully configured via a PC
and
softw
are.
• With address configuration, i.e. the addres
s of the modules is
set via the base and all the rest of the configuration takes
place via a PC. An address set by software is not taken into
account in this case.
• With boot configuration (factory setting), i.e. a module can be
repl
aced at any time by one of the same type (hot swap). The
configuration data are saved in the base and are automati-
cally loaded into the module when it is inserted. This means
you can con
tinue with your measurement without further con-
figuration work. Saving the necessary data in the base occurs
automatica
lly via the configuration software test.commander.
Configuring the operating
mode
The configuration of the operating mode occurs using the DIP
switches in the base (Fig. 4-1). DIP switch 7 is currently not
assigned any function and is reserved for later expansions.
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