User manual

ADAM-4572 & EKI-122X Series User Manual 30
2.4.4 Connecting to a Host or the Network
The EKI-122X series provides two RJ45 connectors with dual independent Ethernet
networks, and supports 10/100 Mbps transmission speed. The ADAM-4572 and EKI-
122X Series will auto detect current transmission speed on the network and
configure itself accordingly. For normal operation, the ADAM-4572 and EKI-122X
Series can be connected to other hubs or switches through a twisted-pair straight
through the Ethernet cable. For configuration or troubleshooting purposes, user may
need to connect the ADAM-4572 and EKI-122X Series directly to the host PC. In this
operation mode, user can use a crossover Ethernet cable to connect the ADAM-4572
and EKI-122X Series to the host PC’s Ethernet connector.
For advanced model, EKI-1221D and EKI-1222D, provide two Ethernet ports with
one IP address. One port can be used to connect to the network, and the other port
can be used to connect to another Ethernet device (or another EKI-1221D/1222D,
like Daisy-Chain structure).
2.4.5 ADAM-4572 Serial Port Wiring
We recommend that shielded-twisted-pair cables that comply with the EIA RS-485
standard be used with the ADAM network to reduce interference. Only one set of
twisted-pair cables is required to transmit both Data and RTS signals. We advise that
the following standard colors (as indicated on the modules) be used for the communi-
cation lines:
Data+ (Y) -> Yellow
Data- (G) -> Green
Wiring for RS-232 Connection
Figure 2.36 Wiring RS-232 Connection