2.12
SEL-311C Relay Instruction Manual Date Code 20060320
Installation
Making Rear-Panel Connections
Making Rear-Panel Connections
Refer to Figure 2.13 and Figure 2.14 for wiring examples of typical
applications.
Tools: Phillips or slotted-tip screwdriver
Parts: All screws are size #6-32. Locking screws can be requested from
the factory.
Ground the relay chassis at terminal Z27.
Wire-Alike Screw
Terminal Connections
All SEL-311C two rack-unit height relays and three rack-unit height relays
without the additional I/O board have SEL-221 Relay wire-alike terminals.
Both SEL-311C standard terminal numbers and SEL-221 terminal numbers
are shown on the rear-panel wiring connections for those models. A properly
programmed SEL-311C may be installed in place of an SEL-221 with no
changes to the terminal numbers in a user’s wiring diagram.
Power Supply
Connect control voltage to the POWER terminals. Note the polarity indicators
on terminals Z25(+) and Z26(–). Control power passes through these terminals
to a fuse and to the switching power supply. The control power circuitry is
isolated from the relay chassis ground.
Refer to Section 1: Introduction & Specifications for power supply ratings.
The relay power supply rating is listed on the serial number sticker on the
relay rear panel.
Output Contacts
Model 0311C00x
Model 0311C00x can be ordered with standard output contacts only. Refer to
Specifications on page 1.10 for output contact ratings.
Standard output contacts are not polarity dependent.
Model 0311C01x
Model 0311C01x has output contacts on two rows of rear-panel screw
terminals:
upper row OUT101 through OUT107, plus ALARM (ordered as standard output
contacts only)
lower row OUT201 through OUT212 (ordered as standard or high-current
interrupting output contacts—all of one type or the other)
Refer to Specifications on page 1.10 for output contact ratings. To determine
the type of output contacts on the extra I/O board of your Model 0311C01x
relay, refer to the part number on the serial number sticker on the relay rear
panel.
NOTE: Do not use the following part
numbers to order SEL-311C Relays.
Contact the SEL factory for ordering
information.
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