Computronic Controls Sentinel 150 - Manual (Page 5)

Sentinel 150 installation, operation & maintenance ci0033 p5/8 issue 4 2015-09-03
Connection terminals (general)
Open frame SNTL(UL)150 models:
Open frame Sentinels use a pair of two-part connectors
with removable screw terminal blocks:

CN1: one 7-way block for connection of the DC Charge
Output, RTC remote temperature sensor, AutoBoost
manual initiate and (UL models only) charge fail output.
Use a 3 mm/0.1 in. flat-head screwdriver to tighten/
loosen the terminals.

CN3: one 3-way block for connection of the mains AC
power supply. Use a 5mm/0.2in flat-head screwdriver
to tighten/loosen the terminals. For details of wire ratings
and fusing, see the AC Input (power supply) section
following.
CN3 AC input terminal numbering varies with model.
Check the product label for connection details:
SNTL150 (standard, non-UL) models: AC supply live,
neutral and ground wires are all connected to CN3:
SNTLUL150 (UL approved) models: AC supply live and
neutral wires are connected to CN3; the AC supply
ground wire must be connected to a separate M4 stud
labelled FG (frame ground) on the metal baseplate:
Enclosed ESNTL150 and ESNTUL150 models
(except ESNTLUL150xxNFPA)
Enclosed ESNTL(UL)150 models have the same circuit
board, terminal numbering and connection requirements
as open-frame SNTL(UL)150 models, but are fitted with
standard (non-removable) screw terminals blocks. Access
to the screw terminals, and access for the wiring harness
(via cable glands), is detailed in the Dimensions and
Assembly section.
Enclosed ESNTLUL150xxNFPA models
Connection on these models through three terminal blocks
on an additional circuit board, which also includes two
additional NFPA 110 compliant alarm outputs.

CN1: a 2-way block for the DC Charge Output. Use a
5mm/0.2in flat-head screwdriver to tighten/loosen the
terminals. See DC Charge Output section following for
details of wire ratings and and fusing.

CN2: a 9-way block for connection of RTC remote
temperature sensor, AutoBoost manual initiate and
three NFPA 110 compliant alarm relay outputs.

CN3: a 3-way block for the AC power supply. Use a
5mm/0.2in flat-head screwdriver to tighten/loosen the
terminals. See AC Input (power supply) section
following for details of wire ratings and fusing.
Terminal arrangement:
All models – wire harness separation
For all models, wire connections for the DC charge output,
DC control signals and AC input supply must be physically
separated, e.g. separate wire harnesses, separately
routed through the case/panel. For enclosed ESNTL
models, use separate cable access ports
(ESNTLUL150xxNFPA model shown below):
Electrical Connection & Configuration
DANGER !
HIGH VOLTS
WARNING: DANGER OF INJURY OR DEATH. During normal operation, Sentinel is
connected to high voltage AC circuits. Before connection, disconnection or handling of
these chargers, ensure isolation of all AC power supplies. Connection or disconnection
with live wiring can also cause hazardous sparking and component damage.