2–14 489 GENERATOR MANAGEMENT RELAY – INSTRUCTION MANUAL
CHAPTER 2: INTRODUCTION
2.2.7 Communications
COMMUNICATIONS PORTS
RS232 port: 1, front panel, non-isolated
RS485 ports: 2, isolated together at 36 Vpk
RS485 baud rates: 300, 1200, 2400, 4800, 9600, 19200
RS232 baud rate: 9600
Parity: None, Odd, Even
Protocol: Modbus
®
RTU / half duplex, DNP 3.0
2.2.8 Testing
PRODUCTION TESTS
Thermal cycling: Operational test at ambient, reducing to –40°C and then
increasing to 60°C
Dielectric strength: 1.9 kV AC for 1 second or 1.6 kV AC for one minute, per UL 508.
DO NOT CONNECT FILTER GROUND TO SAFETY GROUND DURING ANY PRODUCTION TESTS!
TYPE TESTING
The table below lists the 489 type tests:
Standard Test Name Level
EIA 485 RS485 Communications Test 32 units at 4000 ft.
GE Multilin Temperature Cycling –50°C / +80°C
IEC 60068-2-38 Composite Temperature/Humidity 65/–10°C at 93% RH
IEC 60255-5 Dielectric Strength 2300 V AC
IEC 60255-5 Impulse Voltage 5 kV
IEC 60255-5 Insulation Resistance >100 MΩ / 500 V AC / 10 s
IEC 60255-21-1 Sinusoidal Vibration 2 g
IEC 60255-22-2 Electrostatic Discharge: Direct 8 kV
IEC 60255-22-3 Radiated RF Immunity 10 V/m
IEC 60255-22-4 Electrical Fast Transient / Burst Immunity 4 kV
IEC 60255-22-5 Surge Immunity 4 kV / 2 kV
IEC 60255-22-6 Conducted RF Immunity, 150 kHz to 80 MHz 10 V/m
IEC 60255-25 Radiated RF Emission Group 1 Class A
IEC 60255-25 Conducted RF Emission Group 1 Class A
IEC 60529 Ingress of Solid Objects and Water (IP) IP40 (front), IP20 (back)
IEC 61000-4-8 Power frequency magnetic field immunity 30 A/m
IEC 61000-4-11 Voltage Dip; Voltage Interruption 0%, 40%, 100%
IEEE C37.90 Make and carry 30 A DC
IEEE C37.90.1 Fast Transient SWC ±4 kV
IEEE C37.90.1 Oscillatory Transient SWC ±2.5 kV
Courtesy of NationalSwitchgear.com
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