Siemens 7MB2335, Operating Instructions Manual, Page: 48 / 168

Start-up
4-6
Operating instructions ULTRAMAT 23 gas analyzer
C79000-B5276-C216-03
4.3.3 System Setup with Several Analyzers in Parallel
Both analyzers with internal pump and solenoid valve switching
between sample gas and zero gas for AUTOCAL
The cyclic AUTOCAL of the master device triggers an AUTOCAL in
parallel for the slave device via its digital output SYNC and the digital
input SYNC of the slave device.
The simultaneous connection between the digital output SYNC of the
slave device and the digital input SYNC of the master device
guarantees that zero gas is always passed
simultaneously through
both analyzers.
Cooler
Sample gas
Zero gas for
AUTOCAL
ULTRAMAT 23
master
ULTRAMAT 23
slave
DC 24 V power
supply
SYNC
SYNC
SYNC
SYNC
Digital
input
Digital
input
1)
Fig. 4-1 Example with internal pump and solenoid valve switching
1)
Protective extra-low voltage with safe electrical isolation (SELV)
Example 1