Sel 551 - Circuit Board Jumpers and Battery

2.15
Date Code 20110408 Instruction Manual SEL-551 Relay
Installation
Circuit Board Jumpers and Battery
Circuit Board Jumpers and Battery
Control Voltage
Jumpers (SEL-551
With the Conventional
Terminal Blocks
Option)
SEL-551 relays equipped with Conventional Terminal Blocks may be ordered
with either jumper-selectable voltage optoisolated inputs or level-sensitive
optoisolated inputs. Level sensitive inputs are not jumper selectable. See
Specifications, General on page 1.4 for ratings.
The jumper-selectable control voltage models are factory-configured to the
control voltage specified at time of ordering. The jumpers may be changed as
outlined below.
To change the control input voltage range using internal jumpers, take the
following steps:
Step 1. De-energize the relay.
Step 2. Remove the three front-panel screws and the relay front panel.
Step 3. Disconnect the analog signal ribbon cable from the underside
of the relay main board.
Step 4. Grasp the black knob on the front of the drawout assembly, and
pull the assembly from the relay chassis.
Step 5. Locate the control voltage jumpers near the rear edge of the
relay main board. The jumpers are numbered JMP6 through
JMP11. Refer to Figure 2.15.
Step 6. Install or remove jumpers according to Table 2.1 to select the
desired control voltage level.
Step 7. Slide the drawout assembly into the relay chassis.
Step 8. Reconnect the analog signal ribbon cable.
Step 9. Replace the relay front panel.
Step 10. Reenergize the relay.
Output Contact
Jumpers (SEL-551
With the Conventional
Terminal Blocks
Option)
Refer to Figure 2.15. Jumpers JMP1 through JMP5 select the output contact
type for the output contacts. With a jumper in the A position, the
corresponding output contact is an a-type output contact. An a-type output
contact is open when the output contact coil is de-energized and closed when
the output contact coil is energized. With a jumper in the B position, the
corresponding output contact is a b-type output contact. A b-type output
contact is closed when the output contact coil is de-energized and open when
the output contact coil is energized. These jumpers are soldered in place.
The relay contains devices sensitive
to Electrostatic Discharge (ESD).
When working on the relay with the
front panel removed, work surfaces
and personnel must be properly
grounded or equipment damage may
result.
!
CAUTION
Table 2.1 Required Control Voltage Jumper Positions for Applied Nominal Control Voltage (SEL-551 With the
Conventional Terminal Blocks Option)
For use with relays equipped with the jumper-selectable control input voltage option only. Not supported in the
level-sensitive control input option. See product Model Option Table (MOT) for details.
Nominal
Control
Voltage
Optoisolated Input IN1 Jumpers Optoisolated Input IN2 Jumpers
JMP6 JMP7 JMP8 JMP9 JMP10 JMP11
250 Vdc • • • • • • • • • • • •
125 Vdc •—• • • • • •—• • • • •
48 Vdc •—• •—• • • •—• •—• • •
24 Vdc •—• •—• •—• •—• •—• •—•