SERVO
PRO NANOCHROME Gas
Analyser
101
04416001A / Revision 7
6.2 Master/Secondary Chassis rear panel electrical connections
6.2.1 Digital input
There is one digital input used to start an analysis remotely. Connection between
the analyser and the remote system is made with a shielded twisted cable. In case
of fuse failure, change fuse F12, referring to section 6.1.1.
The shield of the digital input contacts cable must be terminated to the analyser
on
one the “E” ports of the rear connector.
Figure 51 : Digital input connection
WARNING
The digital input terminals are separated from the analyser mains
circuits by reinforced insulation. The terminals must only be
connected to circuits that are themselves separated from mains
voltages by an isolation method that provides at least this level of
protection.
6.2.2 Digital output contacts
There are up to 12 dry contact, unpowered digital outputs. They are connected to
a common port and fused. In the case of fuse failure, change fuse F14, referring
to section 6.1.1.
Port Name
Purpose
E
Earth point for cable screening
R1
–
R8
Range ID contacts
A1
–
A2
Alarm indicators
ST
Status indicator
EX1
Calibration indicator
or
Cycle indicator
Table 23 : Digital Output Contacts
