Date Code 20010518 General Description 2-21
SEL-2020 Instruction Manual
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COMMUNICATIONS PROCESSOR - S/N 95012004 Date: 03/06/95 Time: 13:46:43
FID=SEL-2020-R100-V0-D950324
SELF-TESTS
RAM ROM EEPROM FLASH P.S. SET BATTERY
512 kb OK OK 2048 kb OK OK OK
IRIG-B Input: Present
I/O Board: Installed
Modem: Installed
Port Status Success Rate SET M Database Delays
1 Active 100% None
2 Inactive None
3 Inactive None
4 Inactive None
5 Inactive None
6 Inactive None
7 Inactive None
8 Active None
9 Active None
10 Inactive None
11 Inactive None
12 Inactive None
13 Inactive None
14 Inactive None
15 Inactive None
16 Inactive None
F Active 100% None
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“JOB DONE!”
Refer to Section 4: “Job Done” Examples for additional “Job Done” examples using the
SEL-2020.
SEL-2020 ROBUST DESIGN
The SEL-2020 is designed to provide reliable service in a wide variety of electrical, physical and
environmental conditions.
Wide Temperature Operating Range
The SEL-2020 is designed for operation with an ambient temperature between -40° and +85°C
(-40° and +185°F). The SEL-2020 equipped with the optional internal model is designed for
operation with an ambient temperature between -40° and +70°C (-40° and +158°F).
Wide Voltage Range Power Supply
Three power supply voltage ranges are available. The 125/250 volt power supply will operate
with a voltage range of 85 to 300 Vdc, or 85 to 264 Vac. The 48/125 volt power supply will
operate with a voltage range of 36 to 200 Vdc or 85 to 140 Vac. The 24/48 volt power supply
will operate with a voltage range of 18 to 60 Vdc.
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