User`s manual

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EX7000-OEM Preparation for Use 17
OPEN-COLLECTOR VS. TTL DRIVE LINES
The RDBs of the EX7000-OEM may have varying quantities of open-collector and TTL drive
lines, depending on the model ordered. This property is linked to the relay drive connector banks,
as illustrated in
Figure 3-3. The following table indicates how banks are used according the part
number assigned.
Part Number Bank 0 Bank 1 Bank 2
-000 Open-collector Open-collector Open-collector
-001 TTL Open-collector Open-collector
-002 TTL TTL Open-collector
-003 TTL TTL TTL
CAUTION
It is imperative that TTL banks only have TTL devices connected to them. Connecting an
open-collector device to a TTL port will result in damage to the RDB and, potentially, to
other equipment in the test system. Failure to comply with this warning will result in voiding
the manufacturer’s warranty.
NETWORK CONFIGURATION
With its default network configuration, the EX7000-OEM will attempt to locate a DHCP server. If
one is found, the IP address assigned by the DHCP server will be used. Otherwise, after a timeout
of 20 seconds, the unit will attempt to obtain an IP address by using AutoIP.
NOTE At any time, the EX7000-OEM can be returned to a known, default network configuration by
using the LCI (LAN Configuration Initialize) mechanism. See Reset Button for more information.
AutoIP is a mechanism for finding an unused IP address in the range 169.254.X.Y, where X is in
the range 1 through 254 and Y is in the range 0 through 255. The device will first attempt to obtain
the specific address 169.254.X.Y, where X and Y are the second-to-last and last octets (bytes) of
the device’s MAC address. However, X will be set to 1 if it is 0 in the MAC address, and to 254 if
it is 255 in the MAC address. This is in accordance with the AutoIP standard (RFC 3927). If this
address is already in use, the unit will attempt to obtain other IP addresses in a pseudorandom
fashion until it finds one that is available.
To illustrate the AutoIP mechanism,
Table 2-1 lists the AutoIP default address for some example
MAC addresses.
MAC Address AutoIP Default Address
00:0D:3F:01:00:01 169.254.1.1
00:0D:3F:01:01:01 169.254.1.1
00:0D:3F:01:A3:28 169.254.163.40
00:0D:3F:01:FE:FE 169.254.254.254
00:0D:3F:01:FF:FE 169.254.254.254
TABLE 2-1: AUTOIP DEFAULT ADDRESS ASSIGNMENT
If a static IP address assignment is preferred, one can be optionally assigned via the embedded
web page interface. This is done by clicking the Network Configuration link, disabling DHCP
and AutoIP, enabling Static, and then assigning a static IP address, subnet mask, and gateway
address, and, optionally up to three DNS servers. For more information, see
Network
Configuration in
Section 4.