Communications - GE N60 Instruction Manual

2.2 SPECIFICATIONS
ETHERNET SWITCH (HIGH VOLTAGE, TYPE 2S)
Nominal DC voltage:
Minimum DC voltage:
Maximum DC voltage:
Input Current:
Nominal AC voltage:
2
Minimum AC voltage:
Maximum AC voltage:
Internal fuse:
RS232
Front port:
RS485
1 or 2 rear ports:
Typical distance:
Isolation:
ETHERNET (FIBER)
PARAMETER
10MB MULTI-
Wavelength 820 nm
Connector
Transmit power –20 dBm
Receiver sensitivity –30 dBm
Power budget
Maximum input –7.6 dBm
power
Typical distance 1.65 km
Duplex
Redundancy
The UR-2S and UR-2T only support 100 Mb multimode
ETHERNET (10/100 MB TWISTED PAIR)
Modes:
Connector:
SNTP clock synchronization error: <10 ms (typical)
2-12
110 to 240 V DC
88 V DC
300 V DC
0.9 A DC maximum
100 to 240 V AC, 0.26 to 0.16 A/26 to 39
VA at 50/60 Hz
85 V AC, 0.31 A/22 VA at 50/60 Hz
265 V AC, 0.16 A/42 VA at 50/60 Hz
3 A / 350 V AC, Ceramic, Axial SLO
BLO;
Manufacturer: Conquer; Part number:
SCD-A 003
®
19.2 kbps, Modbus RTU
®
Up to 115 kbps, Modbus RTU, isolated
together at 36 Vpk
1200 m
2 kV
FIBER TYPE
100MB MULTI- 100MB SINGLE-
MODE MODE MODE
1310 nm 1310 nm
ST ST SC
–20 dBm –15 dBm
–30 dBm –30 dBm
10 dB 10 dB 15 dB
–14 dBm –7 dBm
2 km 15 km
full/half full/half full/half
yes yes yes
10 MB, 10/100 MB (auto-detect)
RJ45
N60 Network Stability and Synchrophasor Measurement System
2 PRODUCT DESCRIPTION
ETHERNET SWITCH (LOW VOLTAGE, TYPE 2T)
Nominal voltage: 48 V DC, 0.31 A/15 W
Minimum voltage: 30 V DC, 0.43 A/16 W
Maximum voltage: 60 V DC
Internal fuse: 5 A / 350 V AC, Ceramic, Axial SLO
BLO;
Manufacturer: Conquer; Part number:
SCD-A 005
ETHERNET SWITCH FIBER OPTIC PORTS
Maximum fiber segment length calculation:
The maximum fiber segment length between two adjacent
switches or between a switch and a device is calculated as fol-
lows. First, calculate the optical power budget (OPB) of each
device using the manufacturer's data sheets.
OPB P
=
(
T MIN
where OPB = optical power budget, P
and P = receiver sensitivity.
R
The worst case optical power budget (OPB
lated by taking the lower of the two calculated power budgets, sub-
tracting 1 dB for LED aging, and then subtracting the total insertion
loss. The total insertion loss is calculated by multiplying the num-
ber of connectors in each single fiber path by 0.5 dB. For example,
with a single fiber cable between the two devices, there will be a
minimum of two connections in either transmit or receive fiber
paths for a total insertion loss of 1db for either direction:
Total insertion loss number of connectors 0.5 dB
=
×
2 0.5 dB
=
The worst-case optical power budget between two type 2T or 2S
modules using a single fiber cable is:
OPB OPB 1 dB (LED aging)
= –
WORST
10dB 1dB 1dB 8dB
– – =
To calculate the maximum fiber length, divide the worst-case opti-
cal power budget by the cable attenuation per unit distance speci-
fied in the manufacturer data sheets. For example, typical
attenuation for 62.5/125 μm glass fiber optic cable is approxi-
mately 2.8 dB per km. In our example, this would result in the fol-
lowing maximum fiber length:
Maximum fiber length
=
=
The customer must use the attenuation specified within the manu-
facturer data sheets for accurate calculation of the maximum fiber
length.

2.2.8 COMMUNICATIONS

P
–
) ( )
R MIN
= transmitter output power,
T
) is then calcu-
WORST
×
1.0 dB
=
total insertion loss
–
OPB (in dB)
WORST
------------------------------------------------------ -
cable loss (in dB/km)
8 dB
-------------------------- -
2.8km
=
2.8 dB/km
GE Multilin