2-22
Installation
Date Code 20010731
SEL-352-1, -2 Instruction Manual
Because little self-discharge of the battery occurs when an external source powers the relay,
battery life can extend well beyond the nominal 10 years. The battery cannot be recharged.
If the relay does not maintain the date and time after power loss, replace the battery. Follow the
instructions previously described in
Accessing the Relay Circuit Boards
in this section to
remove the relay main board.
CAUTION
!
There is danger of explosion if the battery is incorrectly replaced.
Replace only with Ray-O-Vac
®
no. BR2335 or equivalent
recommended by manufacturer. Dispose of used batteries
according to the manufacturer’s instructions.
Remove the battery from beneath the clip and install a new one. The positive side (+) of the
battery faces up. Reassemble the relay as described in
Accessing the Relay Circuit Boards
. Set
the relay date and time via serial communications port or front panel (see
Section 8: Serial Port
Communications and Commands
or
Section 9: Front-Panel Interface
).
Optional Interface Boards
Different interface boards are available for SEL-352 Relay application flexibility. The number
of inputs, number of outputs, operating speeds, interrupt capabilities, and operation configuration
vary depending on the interface board. This subsection describes each optional I/O board and
shows a partial rear-panel diagram for each optional I/O board. To determine what I/O boards
are installed in an existing relay, issue the
INI
<ENTER>
command. Refer to
Section 8: Serial
Port Communications and Commands
for a complete description of the command. Each I/O
board has a type number associated with it as shown in Table 2.3.
Table 2.3: Interface Board Types
Interface Board
Type
Inputs
Outputs
Main
00
6
7, Standard Independent
Interface 1
21
8
16, Standard Shared-Terminal
Interface 2
42
8
12, Standard Independent
Interface 4
84
16
4, Standard Independent
Interface 5
E5
8
8, Fast Hybrid (High Current
Interrupting)
Interface 6
46
8
12, Hybrid (High Current Interrupting)
Interface Board 1 (16 Outputs, 8 Inputs)
Optoisolated Inputs
All eight control inputs are dry optoisolated inputs and are not polarity dependent. Input options
are 24 Vdc standard or 48, 110, 125, or 250 Vdc level sensitive. Control voltage must be
specified when ordering. To assert an input, apply control voltage to the terminals assigned to
that input. Each input is individually isolated, and a terminal pair is brought out for each input.
Содержание SEL-352-1
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