SEL-2243 Data Sheet
Schweitzer Engineering Laboratories, Inc.
2
Mechanical Installation
Each SEL-2242 chassis/backplane has ten slots, labeled
A
through
J
. Only slots
A
,
B
, and
C
support the SEL-2243
Power Coupler module.
Figure 2
Notch for Module Alignment
To install the power coupler, tip the top of the module
away from the chassis, align the notch on the bottom of
the module (shown in
Figure 2
) with the slot you have
selected in the chassis, and place the module on the bot-
tom lip of the chassis (
Figure 3
). The module is aligned
properly when it rests entirely on the lip of the chassis.
Figure 3
Proper Module Placement
Next, carefully rotate the module into the chassis, mak-
ing sure that the alignment pin fits into the corresponding
slot at the top of the chassis (refer to
Figure 4
). Finally,
press the module firmly into the chassis and tighten the
chassis retaining screw.
Figure 4
Final Module Alignment
Connections
Power
DANGER
Contact with this circuitry may cause electrical shock that can result in
injury or death.
CAUTION
Capacitors should be safely discharged during decommissioning.
The power terminals on the high-voltage power coupler
(1 (+/H) and 2 (–/N)) must connect to 120
/
240 Vac with
the proper polarity or to 125/250 Vdc. The power
terminals on the low-voltage power coupler (1 (+/H) and 2
(–/N)) must connect to 24/48 Vdc. The power terminals
are isolated from the chassis ground. Use 16
–
14 AWG
(1.5–2.5 mm
2
) wire of sufficient current capacity and
insulation voltage ratings to connect to the power
terminals.
Grounding (Earthing)
Connect the ground terminal labeled
GND (3)
on the
power coupler to a rack frame or switchgear ground for
proper safety and performance. Use 14 AWG (2.5 mm
2
)
wire of sufficient current capacity and insulation voltage
ratings that is less than 2 m (6.6 feet) in length for the
ground connection.
EtherCAT Ports
NOTE:
Always ensure that power couplers are not connected to any
Ethernet switches or other Ethernet devices, including RJ45-to-fiber-
optic converters. The power coupler EtherCAT ports are only for direct
connections between power couplers of the same type or to an RTAC
EtherCAT port. Connecting a power coupler to any other Ethernet device
can cause the EtherCAT network to stop communicating completely or
have unpredictable behavior.