Date Code 20011026 Specifications 2-53
SEL-321/321-1 Instruction Manual
Dielectric Strength:
Voltage/Current inputs: 2500 Vac for 10 s
Other: 3000 Vdc for 10 s (excludes EIA-232)
Communications Ports:
EIA-232: 1 Front and 2 Rear
Time-Code Input:
Relay accepts demodulated IRIG-B time-code input.
Operating Temperature Range:
-40° to +85°C (-40° to +185°F)
Relay Weight:
2U Rack unit: 20 lbs. (9.1 kg); shipping weight 32 lbs (14.5 kg)
3U Rack unit: 26.5 lbs (12 kg) ; shipping weight 40.6 lbs (18.5 kg)
Type Tests:
Electromagnetic Compatibility Immunity
Electrostatic Discharge: IEC 61000-4-2–1995, Severity Level 3
Fast Transient
Disturbance: IEC 61000-4-4–1995
Radiated Radio
Frequency: IEC 60255-22-3–1989
Exception:
4.3.2.2 Frequency sweep approx. with
200 frequency steps per octave
IEEE C37.90.2 (Issued for trial use 1987),
10 V/m
Exceptions:
5.5.2 Performed with 200 frequency
steps per octave
5.5.3 Digital Equipment Modulation
Test not performed
5.5.4 Test signal turned off between
frequency steps to simulate
keying
Surge Immunity IEC 61000-4-5–1995, Installation class 4
Note: Using the following
communications cables: C274,
C274 FZ/FD (without IRIG),
C238, C238 FZ/FD (with IRIG)
Surge Withstand: IEEE C37.90.1–1989
1 MHz Burst
Disturbance: IEC 60255-22-1–1988
Environmental
Damp Heat, Cyclic: IEC 60068-2-30–1980, Temp./Humidity
Cycle Test – six day
Vibration: IEC 60255-21-1–1988, Class 1
IEC 60255-21-2–1988, Class 1
Exception:
4.1.4 Vibration Response Amplitude
Tolerance increased to ±25%
(two I/O board version –
rear-panel plug-in connectors
option only)
Safety
Impulse: IEC 60255-5–1977, 0.5 J, 5000 V
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