Eia(Rs) 485 Connections; Output Relay Connections; Usb Connection - GE Agile P50 Series Technical Manual

P50 Agile P153
Note 1:
Note 2:
2.3.3.7

EIA(RS) 485 Connections

For connecting the EIA (RS485), use 2-core screened cable with a maximum total length of 1000 m or
200 nF total cable capacitance.
A typical cable specification would be:
• Each core: 16/0.2 mm
• Nominal conductor area: 0.5 mm
• Screen: Overall braid, PVC sheathed
There is no electrical connection of the cable screen to the device. The link is provided purely to link
together the two cable screens.
2.3.3.8

Output Relay Connections

These should be wired with 1 mm PVC insulated multi-stranded copper wire terminated with M4 ring
terminals.
2.3.3.9

USB Connection

The IED has a type B USB socket on the front panel. A standard USB printer cable (type A one end,
type B the other end) can be used to connect a local PC to the IED. This cable is the same as that
used for connecting a printer to a PC.
P153/EN M/B
Terminal blocks must not be detached whilst any current transformer (CT) circuit is live. CT shorting
must be achieved by external means; the product does not include this facility.
For 5A CT secondary, we recommend using 2 x 2.5 mm
2 copper conductors, PVC insulated
PVC insulated multi-stranded copper wire.
2
2
per core
10 Installation
10-11