Configuration
Entek IRD 6652 DSP Protection Monitor
31
Note:
The 6652 DSP maintains a minimum of 1 volt and a maximum of 24 volts difference
between the TX LO and the TX HI values, so it is not possible for the TX LO value to be
greater than the TX HI value.
RELAYS submenu
The RELAYS submenu has the following options. These options apply to both channels of
the monitor.
Note:
The LATCHED option also affects all status messages that apply to alarms, including the
TX FAIL message. This means you must press
RES
to clear the status message if
LATCHED is set to YES.
Failsafe operation
Failsafe operation means that when in alarm, the relay contacts are in their “normal,” de-
energized, or “shelf-state” positions. In other words, normally closed relays are closed in
alarm, and normally open relays are open in alarm. With failsafe operation, a power failure
equals an alarm. The following are true of a relay in failsafe condition:
l
The relay is energized when power is applied to the unit.
l
The relay in a nonalarmed condition has power applied to the coil.
l
In alarmed condition, power is removed from the relay coil, causing the relay to change
state.
Factory menu
→
RANGES
→
RELAYS
FAILSAFE
LATCHED
DELAYS
VOTING
EXIT
MAPPING
SET
MAPPING
This option is not yet available.
FAILSAFE
Choose failsafe or nonfailsafe operation for the alarm relays (Alert,
Danger, Eccentricity). Failsafe operation is explained below this table.
You can choose failsafe for all alarm relays (ADE), two alarm relays (AD-
or A-E or -DE), only one alarm relay (-D- or A-- or --E), or no alarm
relays (NO). Note that the System OK relay is always in a failsafe
condition.
LATCHED
Choose whether the monitor stays in the alarm state even when the signal
condition that caused the alarm has ended (NO, YES). YES means the
operator must press the
RES
button on the monitor to acknowledge the
alarm and reset the relays. NO means the monitor resets the relay once the
alarm condition has passed. See the note below this table.
DELAYS
Display the DELAYS submenu (page 32) for alarm delays such as the
global alarm delay or the start-up period.
VOTING
This option is not yet available.
EXIT
Return to the RANGES menu. The monitor remembers the current values
for menu options, but does not write them to memory until you exit the
Factory menu.
