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
Table 14. 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
Influencing factors
Ingress protection
Table 15. Ingress protection
Description
Value
IED front
IP 54
IED rear
IP 20
IED sides
IP 40
IED top
IP 40
IED bottom
IP 20
Transformer protection RET650
1MRK 504 137-BEN B
Product version: 1.3
ABB
33
