19.3
Date Code 20171006 Instruction Manual SEL-400 Series Relays
Remote Data Acquisition
Time-Domain Link (TiDL)
TiDL applications use the SEL-2240 Axion, which is a fully integrated analog
and digital I/O control solution suitable for remote data acquisition. An Axion
node consists of a 10-slot, 4-slot, or dual 4-slot chassis that is configurable to
contain a power module and combinations of CT/PT, digital input (DI), or digital
output (DO) modules.
Each chassis requires a SEL-2243 Power Coupler (see Figure 19.4). This module
supplies power to the rest of the node and transmits the data to the relay through
fiber-optic communication. See the SEL-2240 Axion Instruction Manual for more
information.
The SEL-2244-2 Digital Input Module (see Figure 19.5) 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. For more information on DI mapping, refer to Section 2:
Installation in the product-specific instruction manuals.
Figure 19.3 Axion Chassis
Figure 19.4 SEL-2243 Power Coupler
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