4
Entek IRD 6666 and 6667 Protection Monitors
Monitor Description
There are eight push buttons to the right of the display.
Inputs
The primary 6666 and 6667 terminal connections are described below. For a complete
listing, see “Monitor Backplane” on page 8, “Signal to Terminal Block Wiring (6666
Monitor)” on page 9, and “Signal to Terminal Block Wiring (6667 Monitor)” on page 10.
z
Temperature sensor input for each of the six channels on external terminal block
z
Start-up alarm inhibit signal connections
z
Remote alarm relay reset signal connections
z
First-out alarm signal indicates that a connected monitor has detected an alarm; first-out
Danger alarm signal from another monitor causes this monitor to store the latest “trip
trend” data for later analysis.
Outputs
The primary 6666 and 6667 outputs are described below. For a complete listing of the
backplane outputs, see “Monitor Backplane” on page 8, “Signal to Terminal Block Wiring
(6666 Monitor)” on page 9, and “Signal to Terminal Block Wiring (6667 Monitor)” on page
10.
z
4–20 mA per channel into a maximum load of 600 ohms, scaled so that 20 mA
represents the full scale value for the channel on external terminal block
z
First out event line for each alarm (Alert and Danger) grouped for all six channels.
These lines signal connected monitors of an alarm condition, applying common first
out alarm indications across the connected monitors. In the case of a Danger alarm, this
causes all connected monitors to store their “trip trend” and “trip spectrum” data for
later analysis.
z
Data transferred over MODBUS interface includes overall measurement, 30 minute
trend (1 minute interval), and 30 minute trend prior to trip (1 minute interval).
HLP
Reserved for future use.
LIT
Toggles the display backlight on and off. Under normal conditions, the
monitor turns the backlight off after a period of time. The backlight
automatically turns on and stays on in case of an alarm or input signal
failure. See “Display Backlight” on page 5.
DIS
Toggles the display among the alternate display pages. The monitor has
three display pages. See “Displaying Alternate Pages” on page 6.
RES
Resets the alarm relays. See “Manually Resetting Relays” on page 6.
TST
Reserved for future use.
Up Arrow
Used when configuring the monitor: moves the menu selection highlight,
increases the value for the selected configuration option.
Down Arrow Used when configuring the monitor: moves the menu selection highlight,
decreases the value for the selected configuration option.
SEL
Used when configuring the monitor: selects the highlighted menu option,
accepts the displayed value for the selected configuration option.