11
IEC 68-2-30 Damp heat, cyclic (12 + 12-hour cycle).
Humidity, 95% between 25° and 55°C.
IEC 255-5 Impulse voltage test: 0.5 Joule, 5000 Volt.
Logic inputs, output contacts, and power supply.
IEC 255-21-1 Vibration test (sinusoidal).
IEC 255-21-2 Shock and bump tests.
IEC 255-22-1 Electrical disturbance tests for measuring relays and protection
equipment, Part 1: 1 MHz burst disturbance tests.
Logic inputs, output contacts, and power supply.
IEC 801-2 Electrical discharge requirements.
Logic inputs, output contacts, time-code input, power supply, EIA-232 ports, and
modem port.
IEC 801-4 Electrical fast transient/burst requirements.
Logic inputs, output contacts, power supply, and EIA-232 ports.
Serial Ports
1 front-panel/16 rear-panel ports, DB-9 connectors, MOV protected.
(Port 8 dedicated to EIA-232 or optional internal modem).
Real-Time Clock/
Calendar
Battery Type: IEC No. BR2335 Lithium.
Battery Life: 10 years.
Clock Accuracy: ±20 min/yr @ 25°C (without power applied).
±1 min/yr @ 25°C (with power applied).
±1 ms with IRIG-B time-code input.
Baud Rates
300, 600, 1200, 2400, 4800, 9600, 19200, 38400.
Time-Code Input
Connector: Female BNC.
Time Code: Modulated IRIG-B 1000 Vdc isolation.
Demodulated IRIG-B TTL-compatible.
Automatically sets SEL-2020 real-time clock/calendar.
Time-Code Output
Pinout: Pin 4 TTL-level signal.
Pin 6 Chassis ground reference.
Connectors: All 16 rear DB-9 port connectors.
Outputs are generated from IRIG-B input (when present) or generated by CPU from
real-time clock/calendar.
Optional Memory
Base memory: 512 kB RAM, 32 kB EEPROM
Expanded RAM/settings: 1 MB of RAM, 64 kB EEPROM
Expanded RAM/settings, Archive (Flash): 1 MB of RAM, 64 kB EEPROM, 2 MB
Flash
Optional Modem
Internally mounted, “AT” command set compatible; up to 33,600
baud. Complies with Part 68 FCC Rules and Regulations.
300 baud CCITT V.21 and Bell 103
1200 baud CCITT V.22 and Bell 212A
2400 baud CCITT V.22bis
9600 baud CCITT V.32
14400 baud CCITT V.32bis
33600 baud CCITT V.34
RJ-11C rear-panel connector.
May be configured for auto-dial or auto-answer.
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