Power Supply Fuse Replacement; Real-Time Clock Battery Replacement - Siemens SIMPRO-100 Instruction Manual

10
Maintenance & Troubleshooting
10.4 Power Supply Fuse
Replacement
The relay power supply is equipped with a fuse
that you can replace without disassembling the
relay. The fuse holder is located on the relay rear
panel, immediately above the power supply input
terminals, D01 – D03. Using a flat-blade
screwdriver, push the fuse holder in slightly, then
turn counterclockwise. After replacing the fuse,
insert the fuse holder into the hole and, with a
flat-blade screwdriver, turn clockwise to lock it in
place.
Replacement Fuse Specifications: T 2 A 250 V,
high breaking capacity. The following
manufacturers' part numbers are suitable
replacement fuses:
Manufacturer
Schurter, Inc. 0001.2507
Wickman USA, Inc. 181.1200.0.02
Bussman 5505 2A
Littelfuse 215 002
Table 10.7 Manufacturer Part Numbers for Fuses
Contact SEL for replacement fuses if you have
difficulty obtaining an equivalent replacement
locally. Use only high breaking capacity
replacement fuses.
10.5 Real-Time Clock
Battery Replacement
A lithium battery powers the relay clock (date and
time) if the external power source is lost or
removed. The battery is a 3 V lithium coin cell,
Rayovac No. BR2335 or equivalent. At room
temperature (25°C), the battery will operate
nominally for 10 years at rated load. When the
relay is powered from an external source, the
battery only experiences a low self-discharge
rate. Thus, battery life can extend well beyond
130
P/N Comment
Original Equipment
the nominal 10 years because the battery rarely
has to discharge after the relay is installed. The
battery cannot be recharged.
If the relay does not maintain the date and time
after power loss, or if the relay self-tests indicate
an RTC Battery Warning, replace the battery
following the steps listed below.
1. Deenergize the relay.
2. Remove two front-panel retaining screws with
a Phillips screwdriver from the relay front
panel. Carefully remove the relay front panel
from the relay chassis.
3. The relay main board and display are
attached to the inside of the relay front panel.
The battery is located on the upper left-hand
side of the relay main board. Carefully
remove the battery from beneath the clip.
Properly dispose of the old battery; it is not
rechargeable.
4. Install the new battery with the positive (+)
side of the battery facing up.
SIMPRO-100
PRIM-2400C