ABB REL650 series, Technical Manual

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Table 644: IRIG-B
Type Value Accuracy
Input impedance 430 Ohm -
Minimum input voltage
HIGH
4.3 V -
Maximum input voltage
LOW
0.8 V -
Table 645: EIA-485 interface
Type Value Conditions
Minimum differential
driver output voltage
1.5 V –
Maximum output current 60 mA -
Minimum differential
receiver input voltage
0.2 V -
Supported bit rates 300, 600, 1200, 2400,
4800, 9600, 19200,
38400, 57600, 115200
-
Maximum number of 650
IEDs supported on the
same bus
32 -
Max. cable length 925 m (3000 ft) Cable: AWG24 or better, stub lines shall be avoided
Table 646: Serial rear interface
Type Counter connector
Serial port (X9) Optical serial port, type ST for IEC 60870-5-103 and
DNP serial
Table 647: Optical serial port (X9)
Wave length Fibre type Connector
Permitted path attenuation
1)
820 nm MM 62,5/125 µm
glass fibre core
ST 6.8 dB (approx. 1700m length with 4 db /
km fibre attenuation)
820 nm MM 50/125 µm
glass fibre core
ST 2.4 dB (approx. 600m length with 4 db / km
fibre attenuation)
1) Maximum allowed attenuation caused by fibre
19.8 Enclosure class
1MRK 506 335-UUS A
Section 19
Technical data
805
Technical manual