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3.1
OPTIONAL RELAYS
Optional relay contacts are “dry”, meaning that the
installer must provide the voltage to the common terminal
of the relay output.
AC voltage should not be switched directly using the
Eclipse relays. The use of an external relay is required if
AC voltage must be switched by the Eclipse relays.
In order to change alarm relay settings from the factory
default settings, it is recommended to utilize a HART
Field Communicator. Contact the factory for further
assistance.
NOTE
Refer to “Alarm Relays” in the Specifications
section of this manual for important information
regarding alarm relays.
The relay board must temporarily be removed from
the Eclipse termination compartment to connect the
relay output field wiring cables. After the relay wiring
is connected, re-install the relay board using the three
captive screws. Refer to Figure 3.
WIRING PROCEDURE
Ensure that all cables are terminated properly. PointWatch
Eclipse screw terminal torque range is 3.5–4.4 in.-lbs.
(0.4–0.5 N·m).
Conductor insulation should be stripped off with a bare
conductor length of 0.2 inch (5 mm) minimum and 0.7
inch (18 mm) maximum.
Cable shield, if used, should be properly terminated. If
not terminated, clip the shield wire off short and insulate
it within the detector housing to prevent the shield wire
from accidentally contacting the detector housing or any
other wire.
Figure 4 shows the wiring terminal strip located inside the
detector’s integral junction box.
Figure 5 shows the wiring terminal configuration for the
Eclipse CO
2
without relays.
Figure 6 shows the wiring terminal configuration for the
Eclipse CO
2
with relays.
Figures 7 through 10 show the 4-20 mA output of the
Eclipse detector in various wiring schemes.
Figure 11 shows the Eclipse wired for benchtop testing/
programming using HART protocol.
NOTE
The Eclipse housing must be electrically
connected to earth ground. A dedicated earth
ground lug is provided for this purpose.
REMOTE CALIBRATION WIRING
If it is desired to initiate calibration using the remote
calibrate line, the use of the Det-Tronics Model PIRTB
Termination Box is highly recommended for optimum
ease of installation and calibration. The PIRTB module
includes a magnetic reed switch, indicating LED, and
wiring terminal block. Refer to “Remote Calibration
Option” in the “Description” section of this manual for
details.
Figure 12 shows the location of the wiring terminals, reed
switch and LED inside the calibration termination box.
See Figure 13 for wiring details.
WARNING
Do not attempt to physically connect or touch
the calibration lead wire to DCV common in the
field to begin calibration. This practice is often
less than precise, and may result in a spark or
other undesirable results. For optimum ease of
installation and calibration, always utilize a Det-
Tronics junction box with magnetic reed-switch,
indicating LED, and termination block (Model
PIRTB).
Figure 3—Eclipse Wiring Termination Compartment
with Optional Relay Board Removed
FACTORY INSTALLED WIRING
TO RELAY BOARD
(DO NOT REMOVE)
CAPTIVE SCREWS (3)
RELAY TERMINAL BLOCK
A2133