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Page 78
Pointek CLS500 – INSTRUCTION MANUA
7ML19985GG03
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Appendix A
1. Set the rotary switch to 7.
2. Press and hold the RED (+) or BLUE (–) button to select contact open or contact
closed,
3. If required, adjust menu selections 13, 14, 15 and 16 which set the criteria and
threshold that have to be met for a change in output signal.
(In Free Programming Mode only, press and hold both buttons to disable Digital
Signalling Mode.)
Digital Fault Signalling
Controls the solid-state switch response to a fault/failure and allows you to select either
FailSafe High (FSH), or FailSafe Low (FSL).
In FailSafe High mode in normal conditions, the switch is on and contact closed, as long
as the conditions do not cause the switch to close in response to settings at menu 17. If a
fault is detected the switch will be off and contact open. This setting provides no current
in a fault situation, and high current (20 mA) in normal conditions
In FailSafe Low mode in normal conditions, the switch is off and contact open, as long as
the conditions do not cause the switch to close in response to settings at menu 17. If a
fault is detected the switch will be on and contact closed. This setting provides high
current (20 mA) in a fault situation, and no current in normal conditions.
Notes:
•
Factory setting FSH links menus 17 and 18, and sets them to enable digital fault
signalling. (In Free Programming Mode, available at menu 1E, all menu items are
independent.)
•
Menu 18 has precedence over the settings on Menu 17, but if no fault exists, the
switch will respond to the setting in menu 17.
FailSafe HIgh
FailSafe Low
no fault
fault
no fault
fault
uncovered
covered uncovered
covered
uncovered
covered uncovered covered
20 mA
closed
4 mA
open
3.6 mA
open
4 mA
open
20 mA
closed
22 mA
closed