Siemens Milltronics SF 500 - Ma I;O Board; Installing;Replacing the Memory Back-Up Battery

Page 16 Milltronics SF 500 – INSTRUCTION MANUAL 7ML19985CN01
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Installation
mA I/O Board
Installing/Replacing the Memory Back-up Battery
The memory battery (3V NEDA 5003LC) has a life expectancy of 10 years. Battery life may
be less in cooler climates. In the event that the SF 500 loses external and battery power, a
capacitor powers the RAM for approximately 5 minutes.
The SF 500 requires no maintenance or cleaning, other than a periodic replacement of
the memory backup battery.
Installation Steps
1. Open the enclosure lid.
2. Slide the battery into the holder.
Be sure to align the + and –
terminals correctly.
3. Close and secure enclosure lid.
auxiliary supply output, isolated 24 V dc at
50 mA, short circuit protected
from customer instrumentation, isolated mA
input, 200Ω
from customer instrumentation, isolated mA
input, 200Ω
to customer instrumentation, isolated mA
output, 750Ω maximum load
to customer instrumentation, isolated mA
output, 750Ω maximum load
Notes:
• Do not install the memory backup battery until the SF 500 is installed, as it begins
operation immediately.
• The unit is supplied with one battery. Insert it into the holder as shown below.
Disconnect power before installing or replacing the battery.