Computronic Controls Sentinel 300P - Manual (Page 4)

Sentinel 300P installation, operation & maintenance ci0039 p4/12 issue 9 2015-09-04
Dimensions and Assembly
CAUTION: Sentinel 300P chargers should be handled by the circuit board cover (SNTL models) or steel
enclosure (ESNTL models). Care should be taken not to handle static sensitive components through exposed
circuit boards and terminals.
SNTL300P models
Overall:
W 158 mm / 6.22 in.
H 208 mm / 8.19 in.
D 84 mm / 3.31 in.
Fixing holes:
X 150 mm / 5.91 in.
Y 150 mm / 5.91 in.
Weight:
1.1 kg / 2.5 lb

These chargers are designed for mounting in a
vertical plane inside an enclosed control panel
or housing. Mounting orientation should be as
shown above, with electrical connection
terminals lowermost.

For safe heat dissipation, mount Sentinel in
the orientation shown, with a minimum air-gap
clearance of 40mm/1.5 in. above/below and
25mm/1 in. at the sides. Consideration must be
given to ventilation for proper heat dissipation.

For surface mounting, use the 2 centre slots (Ø
6mm/0.24in.) or 4 corner slots (Ø 6mm/0.24in.).
Ensure that the mounting studs/bolts/nuts/
screws adequately support the charger, and are
tightened sufficiently to not to become loose
during normal use, e.g. due to engine/equipment
vibration.

Optional clip for DIN rail mounting (2 required for
each charger), part number 045-0001.
ESNTL300P models
Overall:
W 165mm / 6.50 in.
H1 300 mm / 11.81 in.
H2 80 mm / 3.15 in.
D1 125 mm / 4.92 in.
D2 130 mm / 5.12 in.
Fixing holes:
X 63.5 mm / 2.50 in.
Y 285.5 mm / 11.25 in.
Weight:
2.0 – 2.1 kg / 4.4 – 4.6 lb

These chargers are designed for wall or frame mounting in the
orientation shown above, with enclosure air vents uppermost.
For safe heat dissipation, allow a minimum air-gap clearance
of 40mm/ 1.5 in. above/below and 25mm/1 in. at the sides.
Consideration must be given to ventilation for proper heat
dissipation.

Mounting is via the enclosure back-plate, using 4 holes/slots
(Ø 6mm/0.24in.) on the upper and lower edges. Ensure that the
mounting studs/bolts/nuts/ screws adequately support the charger
weight, and are tightened sufficiently to not to become loose during
normal use, e.g. due to engine/equipment vibration.

Access to the electrical connection terminals is via a hinged lower
front plate. Remove the 2 x securing screws (marked S above),
and then rotate the hinged section through 90 degrees.

Electrical cable harness entry is via knock-out ports on either side of
the enclosure, which must be carefully removed from the enclosure
sides. A suitable cable-gland (20mm/0.8in. diam.) must be used to
prevent damage to cables and stop unwanted entry into the inner
part of charger. Wiring for DC charge output (connector CN1),
DC control (CN2) and AC supply input (CN3) must be physically
separate, e.g. using separate wire harnesses and case access ports:
see page 5 section Wire Harness Separation.

Connect the charger wiring as detailed in the following Electrical
Connection section. When wiring is complete, and before using the
charger, re-secure the hinged front section using the 2 fixing screws.