ABB REQ650 - Page 56

Table 10. X8/IRIG-B and EIA-485 interface
Type Protocol Cable
Screw terminal, pin row
header
IRIG-B Shielded twisted pair cable
Recommended: CAT 5, Belden RS-485 (9841- 9844) or
Alpha Wire (Alpha 6222-6230)
Screw terminal, pin row
header
Shielded twisted pair cable
Recommended: DESCAFLEX RD-H(ST)H-2x2x0.22mm
2
,
Belden 9729, Belden 9829
Table 11. IRIG-B
Type Value Accuracy
Input impedance 430 Ohm —
Minimum input voltage
HIGH
4.3 V —
Maximum input voltage
LOW
0.8 V —
Table 12. 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 13. Serial rear interface
Type
Counter connector
Serial port (X9) Optical serial port, type ST for IEC 60870-5-103 and DNP
serial
Breaker protection REQ650 1MRK 505 283-BEN -
Product version: 1.2
56 ABB