Ethernet interface (X610)
The system module CX2500-1061 supplies PoE-capable devices with power via the Ethernet interface (X610). The required voltage is generated internally in the system module CX2500-1061. An external power supply is not required.
Devices that are not PoE-capable can also be connected to the Ethernet interface (X610). The system module CX2500-1061 checks the connected devices before starting and tests them for PoE capability.
Energy supply
The following methods are available for the energy supply and data rates of up to 100 Mbit/s:
- Mode A: the power is transmitted on the data wires of the Ethernet cable.
With this method, the voltage for the power supply is superimposed on the data signal. The same wire pairs (1/2 and 3/6) are used for the energy supply and the data transmission. - Mode B: the power is transmitted on the free wires of the Ethernet cable.
With this method, the free wire pairs (4/5 and 7/8) are used for the power supply. The data transmission and energy supply are cleanly separated.
Modes A and B are mixed for data rates of 1000 Mbit/s (Gigabit). The data transmission and energy supply are not separated and the voltage for the energy supply is superimposed on the data signal.
PIN | Description | 10, 100 Mbit/s | 1000 Mbit/s (1 Gigabit/s) | ||
|---|---|---|---|---|---|
Mode A | Mode B | Mode A | Mode B | ||
1 | Pair 2 | Rx+ / DC- | Rx+ | TxRx+ / DC- | TxRx+ |
2 | Rx- / DC- | Rx- | TxRx- / DC- | TxRx- | |
3 | Pair 3 | Tx+ / DC+ | Tx+ | TxRx+ / DC+ | TxRx+ |
4 | Pair 1 | - | DC+ | TxRx+ | TxRx+ / DC+ |
5 | - | DC+ | TxRx- | TxRx- / DC+ | |
6 | Pair 3 | Tx- / DC+ | Tx- | TxRx- / DC+ | TxRx- |
7 | Pair 4 | - | DC- | TxRx+ | TxRx+ / DC- |
8 | - | DC- | TxRx- | TxRx- / DC- | |
Requirements for the Ethernet cable
- Mode A: a 4-wire cable is sufficient for 10BASE-T and 100BASE-TX. Data rates of 10 and 100 Mbit/s are supported. An 8-wire cable is required for 1000BASE-T. Data rates of 1000 Mbit/s are supported.
- Mode B: an 8-wire cable is required for 10BASE-T, 100BASE-TX and 1000BASE-T. Speeds of 10, 100 and 1000 Mbit/s are supported.
Always use category Cat5e Ethernet cables to operate as many PoE-capable devices as possible from a wide range of manufacturers. The maximum cable length is 100 m.