Date Code 20020129
Installation
2-19
SEL-387E Instruction Manual
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 7: Serial Port
Communications and Commands
or
Section 8: Front-Panel Interface
).
Additional Interface Board
We offer versions of the SEL-387E Relay in a taller case size (3U) to accommodate one
additional circuit board. The additional board mounts below the main board and above the
analog input (transformer) board.
Three interface board types are available. Interface Board 2 has 12 standard output contacts and
8 optoisolated inputs. Interface Board 4 has 4 standard output contacts and 16 optoisolated
inputs. Interface Board 6 has 12 hybrid high current interrupting output contacts and 8
optoisolated inputs. These latter contacts can interrupt as much as 10 A of dc current, as
indicated in the
General Specifications
in
Section 1: Introduction and Specifications
.
Jumpers
As on the main board, the output contacts of Interface Boards 2 and 6 have solder jumpers for
configuring the output as either a form-A (normally open) or form-B (normally closed) contact.
When removing the board to change jumpers, follow the procedure outlined in
Accessing the
Relay Circuit Boards
. Take precautions related to protection of components from damage due
to electrostatic discharge (ESD).
Note:
The level-sensitive optoisolated inputs on both interface boards have no jumpers. You
must specify control voltage at the time of order.
Board Layout
Figure 2.14, Figure 2.15, and Figure 2.16 show the layout of Interface Board 2, Interface Board
4, and Interface Board 6 (conventional terminal block), respectively. Figure 2.17 and Figure
2.18 show the layout of Interface Board 2 and Interface Board 6 (Connectorized), respectively.
The only difference between the two is the row of electronic components that form the
interruption circuits of the high current interrupting contacts on Interface Board 6.
