Dynacord DPM 8016, Руководство по эксплуатации, Страница: 19 / 40

The following diagram shows the assignment of the Ethernet connector. The diagram shows
the connector from the contact side.
Figure 6.4: Assignment of the Ethernet connector
In both Ethernet standards, the maximum length of a connected cable is 100 meters, with two
twisted wire pairs used in each cable. For 10Base-T, a category 3 cable (unshielded, CAT-3)
must be used, and for 100Base-TX, a category 5 cable (shielded, CAT-5) must be used. When
connecting the DPM 8016 using a patch cable in conjunction with a hub/switch, the cable
wiring must be one to one, i.e., the wire of the cable at pin 1 for one connector is connected
with pin 1 on the other connector; the same process applies to the other pins. The two
standards T568A and T568B are used for the colors of the cable wires, although standard
T568B is more widely used.
LED status lights
The Ethernet interface of the DPM 8016 controller has an orange and a green LED to display
the status of the Ethernet connection. If no network cable is connected, both LEDs remain
unlit. The orange connectivity LED on the left side of the Ethernet interface illuminates once
the DPM 8016 controller has established an Ethernet connection with another device (e.g.,
another DPM 8016 controller or an Ethernet switch). The green network traffic LED on the
right side of the Ethernet interface briefly illuminates each time Ethernet data is transferred.
Crossover cable
When using a crossover cable to connect a DPM 8016 controller with a PC directly, wire-pair 2
must be swapped with wire-pair 3. This creates the necessary switch of sending and receiving
lines; with a hub/switch, this exchange is performed internally.
REMOTE CAN BUS
The DPM 8016 controller has two RJ-45 jacks for the REMOTE CAN BUS. The jacks are
switched in parallel, and act as an input and for looping the remote network. Standard RJ-45
network cables can be used for cabling within the rack.
For longer cable lengths, observe the CAN guidelines. The CAN bus requires a 120 Ω
connecting jack at both ends. The CAN bus allows different data rates to be used, where the
data rate is indirectly proportional to the bus length. If the network has only a minimal extent,
data rates of up to 500 kbit/s are possible. In larger networks, the data rate will be decreased
(down to the minimum data rate of 10 kbit/s).
Notice!
The data rate is preset to 10 kbit/s.
The following table explains the relationship between data rates and bus lengths/network
size. Bus lengths of over 1000 meters should be implemented only with CAN repeaters.
Data rate (in kbit/s) Bus length (in meters)
500 100
250 250
6.3
DPM 8016 Connections | en 19
Operation manual 16-Dec-13 | 02 | F01U259190