Metrohm 726 Titroprocessor - Manual (Page 29)

22. . Installation Installation
726 Titroprocessor, Instructions for use 23 23
2.6.3 External bus
The external bus allows external instruments to be controlled by the 726 Ti-
troprocessor. Sample changers and dosing devices such as the 685 Dosi-
mat or the 700 Dosino can communicate bi-directionally with the Titroproc-
essor (=bus master).
External devices must be connected with EBus cables according to the fol-
lowing scheme:
Bus master External device External device
External bus
Each external instrument is identified by an EBus address. When the Titro-
processor is switched on they are automatically identified. An EBus address
must be set for each external device (1…9, A…F; 0 stands for the bus
master).
Address selector
The corresponding EBus address can be set with
a screwdriver. The EBus address selector is usu-
ally located on the rear panel of the external de-
vice.
External device EBus
address
Corresponding
peripherals
Sample changer 1 1 1…2 lifts, 0…4 pumps,
1…4 stirrers
Sample changer 2 2 1…2 lifts, 0…4 pumps,
1…4 stirrers
Dosimat interface 1 1 1…4 Dosimats (B1…B4)
Dosimat interface 2 2 1…4 Dosimats (C1…C4)
Devices such as sample changers which consume a lot of current should
be connected in the first position of the EBus chain. This is particularly im-
portant if the relevant sample changer is equipped with more than one
pump. The 729 Dosimat interfaces should be connected to the 717 Sample
changer.
The 726 Titroprocessor and the Dosimat interfaces must be connected to
the same earth. A line distributor should be used to supply all devices on
the external bus.
The 726 Titroprocessor must be switched off before a pe-
ripheral device is connected.