2.9
Date Code 20170601 Instruction Manual SEL-387-0, -5, -6 Relay
Installation
Rear-Panel Connections
Prewired Connectors
The wiring harness kit contains several prewired connectors for relay current
inputs, power, and ground connections. These prewired connectors include the
following:
➤ (4) six position CT shorting connectors for current inputs IAW1,
IBW1, and ICW1; IAW2, IBW2, and ICW2; IAW3, IBW3, and ICW3; and
IAW4, IBW4, and ICW4. For these connectors select a wire size
from AWG 16 to 10.
➤ (1) connector for POWER inputs (+ and –). For these connectors
select a wire size from AWG 18 to 14.
➤ (1) spade connector for chassis GROUND connection.
Unwired Connectors
With the wiring harness kit are the following unwired connectors for the relay
optoisolated inputs, contact outputs, and EIA-485 communications port
connections:
➤ (2) eight position female plug in connectors for output contacts
OUT101 through OUT104 and OUT105 through ALARM.
➤ (2) six position female plug in connectors for optoisolated
inputs IN101 through IN103 and IN104 through IN106.
➤ (1) eight position female plug in connector for the EIA-485
serial port connection SERIAL PORT 1 and the demodulated
IRIG-B input. Alternatively, you can bring IRIG-B through
SERIAL PORT 2.
➤ (4) six position female plug in connectors for interface board
output contacts OUT201 through OUT203, OUT204 through
OUT206, OUT207 through OUT209, and OUT210 through OUT212.
➤ (2) eight position female plug-in connectors for interface board
optoisolated inputs IN201 through IN204 and IN205 through
IN208.
Connections
Frame Ground
For safety and performance, ground the relay chassis at terminal GND (Z27).
Connectorized relays provide a 0.250-inch-by-0.023-inch spade connector for
this connection. If the tab on the chassis is removed, the chassis ground
connection can be made with the size #6-32 screw. The grounding terminal of
either relay version connects directly to relay chassis ground.
Power Supply
Connect rear panel terminals marked + (Z25) and – (Z26) to a source of control
voltage. Control power passes through these terminals to a fuse(s) and to the
switching power supply. The control power circuitry is isolated from the frame
ground. The 24/48 V power supply is polarity sensitive. Refer to Section 1:
Introduction and Specifications for power supply voltage ranges.
NOTE: These unwired connectors
accept wire sizes AWG 24 to 12. To
install these connectors, you will need
a wire stripping tool and small, slotted
tip screwdriver. Strip 0.31 inches
(8 mm) insulation from the wires and
install the wires in the connectors.
Secure each connector to the relay
chassis with the screws located on
each connector end.
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