Real-time clock, Communication ports, Interface – Basler Electric BE1-851 User Manual
Page 27: Display, Isolation, Surge withstand capability, Oscillatory, Fast transient, Radio frequency interference (rfi), Electrostatic discharge (esd)
Real-Time Clock
Accuracy ......................................................................... 1 second per day at 25°C (free running) or ±2
milliseconds (with IRIG synchronization)
Resolution ....................................................................... 1 millisecond
Date and Time Setting Provisions .................................. Front panel, communications port, and IRIG. Leap
year correction provided.
Clock Power Supply Holdup Capacitor........................... 8 to 24 hours, depending on conditions
Clock Power Supply Holdup Battery............................... Greater than 5 years
Backup Battery (Optional) .............................................. Lithium battery 3.6 Vdc, 0.95 AH,
Basler Electric p/n: 9318700012 or
Applied Power p/n: BM551902
Communication Ports
Interface
Front RS-232 .................................................................. 300 to 19,200 baud, 8N1, full duplex
Rear RS-232 ................................................................... 300 to 19,200 baud, 8N1, full duplex
Rear RS-485 ................................................................... 300 to 19,200 baud, 8N1, half duplex
Display
Type ................................................................................ Two line, 16 characters alphanumeric LCD (liquid
crystal display) with light emitting diode (LED)
backlight.
Operating Temperature .................................................. −40°C (−40°F) to +70°C (+158°F)
Display contrast may be impaired at temperatures
below −20°C (−4°F).
Isolation
All circuits to Ground ...................................................... 2,828 Vdc (excludes communication ports)
Input Circuits to Output Circuits ...................................... 2,000 Vac or 2,828 Vdc
Communication Ports to Ground .................................... 700 Vdc for one minute
Surge Withstand Capability
Oscillatory
Qualified to IEEE C37.90.1-2002, Standard Surge Withstand Capability (SWC) Tests for Protective
Relays and Relay Systems.
Fast Transient
Qualified to IEEE C37.90.1-2002, Standard Surge Withstand Capability (SWC) Tests for Protective
Relays and Relay Systems.
Radio Frequency Interference (RFI)
Type tested using a five-watt, hand-held transceiver in the ranges of 144 and 440 MHz with the antenna
placed six inches from the relay. Qualified to C37.90.2-1995, Standard For Withstand Capability Of Relay
Systems To Radiated Electromagnetic Interference From Transceivers.
Electrostatic Discharge (ESD)
8 KV contact discharges and 15 KV air discharges applied in accordance with IEC EN61000-4-2 criterion.
Shock
In standard tests, the relay has withstood 2 g in each of three mutually perpendicular planes shock
without structural damage or degradation of performance.
Vibration
In standard tests, the relay has withstood 2 g in each of three mutually perpendicular planes, swept over
the range of 10 to 500 Hz for a total of six sweeps, 15 minutes each sweep, without structural damage or
degradation of performance.
9289900990 Rev R
BE1-851 General Information
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