Irig-B Connection; Opto-Input Connections; Output Relay Connections; Ethernet Metallic Connections - GE MiCOM P40 Technical Manual

Chapter 23 - Installation
4.6

IRIG-B CONNECTION

The IRIG-B input and BNC connector have a characteristic impedance of 50 ohms. We recommend that
connections between the IRIG-B equipment and the product are made using coaxial cable of type RG59LSF with a
halogen free, fire retardant sheath.
4.7

OPTO-INPUT CONNECTIONS

These should be wired with 1 mm
Each opto-input has a selectable preset ½ cycle filter. This makes the input immune to noise induced on the wiring.
This can, however slow down the response. If you need to switch off the ½ cycle filter, either use double pole
switching on the input, or screened twisted cable on the input circuit.
Caution:
Protect the opto-inputs and their wiring with a maximum 16 A high rupture capacity
(HRC) type NIT or TIA fuse.
4.8

OUTPUT RELAY CONNECTIONS

These should be wired with 1 mm PVC insulated multi-stranded copper wire terminated with M4 ring terminals.
4.9

ETHERNET METALLIC CONNECTIONS

If the device has a metallic Ethernet connection, it can be connected to either a 10Base-T or a 100Base-TX
Ethernet hub. Due to noise sensitivity, we recommend this type of connection only for short distance connections,
ideally where the products and hubs are in the same cubicle. For increased noise immunity, CAT 6 (category 6) STP
(shielded twisted pair) cable and connectors can be used.
The connector for the Ethernet port is a shielded RJ-45. The pin-out is as follows:
Pin
1
2
3
4
5
6
7
8
4.10

ETHERNET FIBRE CONNECTIONS

We recommend the use of fibre-optic connections for permanent connections in a substation environment. The
100 Mbps fibre optic port uses type ST connectors (one for Tx and one for Rx), compatible with 50/125 µm or
62.5/125 µm multimode fibres at 1300 nm wavelength.
Note:
For models equipped with redundant Ethernet connections the product must be partially dismantled to set the fourth octet of
the second IP address. This ideally, should be done before installation.
602
2
PVC insulated multi-stranded copper wire terminated with M4 ring terminals.
Signal name
TXP
TXN
RXP
-
-
RXN
-
-
Signal definition
Transmit (positive)
Transmit (negative)
Receive (positive)
Not used
Not used
Receive (negative)
Not used
Not used
P446SV-TM-EN-1
P446SV