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5BHARDWARE FEATURES
INTRODUCTION
Figure 1-14 Pinout for the RS 232 rear
port (DB9)
Figure 1-15 Pinout for the RS 232 rear port
(fiber optics)
1.5.14.3. RS 485 REAR PORT CONFIGURATION
The following pins are available 1 (Data - ); 2 (Data + ) and 3 (GND – ground)
see Figure 1-16.
Figure 1-16 Pinout for the RS 485 rear port
When connecting the protections in an RS-485 based network, a 120 ohm resistor
should be placed at each end of the network. Do not build RS-485 Y or T network
topologies. It should be a series connection (one equipment to another). If it is
convenient / necessary to have T / Y connections, it must be limited to one meter.
You can find out if an RS-485 is properly configured by using an ohmmeter: The
resistance of the circuit can be measured at any point and its value must be between
100 and 125 ohms. Different values need to be reviewed as they may indicate an
open point (higher resistance) or a short circuit (lower resistance).
Summary of Contents for smART P500
Page 1: ...Instruction Manual Multifunction Protection Relay smART P500...
Page 23: ...2BTABLES INDEX THIS PAGE HAS BEEN LEFT BLANK INTENTIONALLY...
Page 39: ...5BHARDWARE FEATURES INTRODUCTION Figure 1 9 Wye Wye Connection measured neutral...
Page 40: ...5BHARDWARE FEATURES INTRODUCTION Figure 1 10 Wye Wye Connection sensitive neutral...
Page 41: ...5BHARDWARE FEATURES INTRODUCTION Figure 1 11 Open Delta Connection measured neutral...
Page 42: ...5BHARDWARE FEATURES INTRODUCTION Figure 1 12 Open Delta Connection sensitive neutral...
Page 511: ...2BANSI CURVES 0BCURVES FOR TIME CHARACTERISTICS Figure I 6 Moderately ANSI curve...
Page 513: ...2BANSI CURVES 0BCURVES FOR TIME CHARACTERISTICS Figure I 7 Very inverse ANSI curve...
Page 515: ...2BANSI CURVES 0BCURVES FOR TIME CHARACTERISTICS Figure I 8 Extremely inverse ANSI curve...
Page 532: ...4BRECLOSER CURVES 0BCURVES FOR TIME CHARACTERISTICS Figure I 14 Recloser Curves 101 119...
Page 535: ...4BRECLOSER CURVES 0BCURVES FOR TIME CHARACTERISTICS Figure I 15 Recloser Curves 120 142...
Page 538: ...4BRECLOSER CURVES 0BCURVES FOR TIME CHARACTERISTICS Figure I 16 Recloser Curves 151 202...