Signal Output Connections; Figure 22 Monitor Rear Panel Connections - Michell Instruments Easidew Online User Manual

Easidew Online User's Manual
2.14

Signal Output Connections

The Easidew Online system has three signal outputs, Alarm 1 (ALr1), Alarm 2 (ALr2)
and the re-transmitted input signal (4-20 mA or 0-20 mA current loop signal depending
upon instrument confi guration).
Figure 22 shows the relevant rear panel connections. Table 3 shows a summary of all
the electrical connections to the monitor.
Alarm Outputs
Alarm 1 is a single pole make contact. Connect incoming signal lines to terminal 16
(common) and terminal 17 (normally open).
Alarm 2 comprises a set of changeover contacts. Connect incoming signal lines to
terminal 9 (common), terminal 8 (normally open) and terminal 7 (normally closed).
Michell Instruments
The signal outputs will be connected to external systems that
can potentially infl uence the operation of the process.
Alarm level signals could be at mains potential so it is essential
that, before connecting these signal lines, checks are made
to ensure that these inputs are not live and that it is safe to
Figure 22 Monitor Rear Panel Connections
handle them.
INSTALLATION
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