Section 2 - Installation
7
2.2.1 Setting Relays for Latching or Non-Latching Behavior
A latching relay stays in an alarm state even after the vibration has dropped
below the setpoint level for that relay. A non latching relay moves from its alarm
state to its non-alarm state once the vibration drops back below the setpoint level
for that relay. Table 2.1 describes how to set jumpers W7 and W8 to control
latching and non latching behavior for the Alert and Danger relays.
TABLE 2.1: Latching/Non-latching Jumper
Settings
OPTION JUMPER SETTING
install remove
Alert latching* W8
Alert nonlatching W8
Danger latching* W7
Danger nonlatching W7
* Factory default setting
2.2.2 Setting Relays for Normally Energized or Normally De-energized
Behavior
The Normally Energized/De-energized option controls whether power is applied to
the relay coil during an alarm state or during a non-alarm condition. For normally
de-energized relays, no power is applied to the relay coil during non-alarm
conditions. Power is applied during alarm conditions. For normally energized
relays, power is applied to the relay coil during non-alarm conditions. Power is
removed during alarm conditions. Normally energized relays are useful when you
want to shut a machine off when vibration monitoring stops due to loss of
monitor power. Table 2.2 shows how to set jumpers W5 and W6 for Normally De-
energized or Normally Energized Alert and Danger Relays.
TABLE 2.2: Normally Energized and
Normally De-energized Jumper Settings
OPTION JUMPER SETTING
install remove
Alert Normally De-energized* W6
Alert Normally Energized W6
Danger Normally De-energized* W5
Danger Normally Energized W5
* Factory default setting
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