Siemens ULTRAMAT 23 Operating Instructions Manual page 48

Start-up
4.3.3 System Setup with Several Analyzers in Parallel
Example 1
Sample gas
Zero gas for
AUTOCAL
Fig. 4-1 Example with internal pump and solenoid valve switching
1)
Protective extra-low voltage with safe electrical isolation (SELV)
4-6
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
ULTRAMAT 23
master
1)
DC 24 V power
supply
ULTRAMAT 23
slave
Operating instructions ULTRAMAT 23 gas analyzer
SYNC
SYNC
Digital
input
SYNC
SYNC
Digital
input
C79000-B5276-C216-03