2.39
Date Code 20171021 Instruction Manual SEL-421 Relay
Installation
Connection
The SEL-2243 has sufficient power capacity to accommodate an entire Axion
node. The terminal strip at the bottom of the unit (shown in Figure 2.39) is the
connection point for incoming power. All Axion modules have a 55-position IEC
C-style connector that provides a communications and power interface to the
backplane. See the SEL-2240 Axion Instruction Manual for more information.
SEL-2244-2 Digital Input Module
The SEL-2244-2 Digital Input Module (see Figure 2.40) consists of 24 optoiso-
lated inputs that are not polarity dependent. These inputs can be configured to
respond to ac or dc control signals. The TiDL system maps as many as 72 DI
points to the relay in the 300, 400, and 500 I/O board levels, based on the mod-
ules that occur in the network. Only the first 12 of 24 inputs are used in each
module to help distribute the I/O around the network more efficiently. The inputs
are mapped to the relay inputs based on the order in which the DI module occurs
in the TiDL network.
There can be multiple DI modules in an Axion node, and the order of the DI
modules will proceed from left to right in the node to determine the mapping of
the inputs.
The first DI module that exists in the system, for example, on PORT 6A, will map
to IN301–IN312, and if a second module is available on PORT 6A, it will map to
IN313–IN324. If a second module does not exist on PORT 6A, IN313–IN324 will be
mapped from the next module appearing in the TiDL system. Mapping order
determination starts with PORT 6A and ends with the last port, PORT 6H.
Figure 2.39 SEL-2243 Power Coupler
First SEL-2244-2 DI Module IN301–IN312
Second SEL-2244-2 DI Module IN313–IN324
Third SEL-2244-2 DI Module IN401–IN412
Fourth SEL-2244-2 DI Module IN413–IN424
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