
BusWorks® Model 989EN U
ser’s Manual Modbus TCP/IP Digital I/O & Counters
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Acromag, Inc. Tel:248-295-0880 Fax:248-624-9234 Email:
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1
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6
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8
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PINS: 1 TO 3
2 TO 6
3 TO 1
6 TO 2
RJ45 (Clip Side Down)
RJ45 (Clip Side Down)
FOR DIRECT PC TO
ETHERNET MODULE
CONNECTIONS
CROSSOVER CABLE
FOR MDI TO MDI
OR MDI-X TO MDI-X
CROSSOVER
CONNECTIONS
From the factory, the 989EN unit has a default IP address setting of
128.1.1.100, and a class C subnet mask of 255.255.255.0. This defines a
restricted default address domain that your current network cannot address
directly, unless you first create an exclusive subnet targeted to the 989EN.
This typically involves a process by which you either change the address of
your current network interface card (which will temporarily disable it from
your own network), install a second network interface card, or obtain an
unused PC or laptop with a NIC installed. In any case, you must set the
address of your network interface card to an address within the default
address domain. That is, an address from 128.1.1.0 to 128.1.1.255, except
for 128.1.1.100, which is the default address of the 989EN itself. Once you
are able to address the unit at its default address, you can then reconfigure
its IP address setting to an address more meaningful to your own network.
Application Note 8500-734 is downloadable from the Acromag website and
covers this process in greater detail.
D E F
A C T
S T
R U N
Acromag
Acromag
Acromag
E TH E R N E T
E TH E R N E T
LIN K
HOST PC
(Use Regular or Crossover Cable)
CAT-5 UTP CABLE
UP TO 100 METERS
Acromag 989EN-4016
Ethernet Module.
The ethernet port of this
module is wired MDI-X, but
supports automatic crossover.
HOST PC CONNECTED DIRECTLY TO A MODULE
Refer to the Accessory Cables section at the back of this manual for more
information on accessory cables including patch and crossover cables
available from Acromag and other vendors.
TIP:
You can significantly enhance the EMI/RFI performance of your
network connections by using Category 5E STP cable (Shielded Twisted
Pair) with shielded RJ45 plug connectors. This will also help to protect your
installation from damage due to ESD (Electro-Static Discharge). The use of
shielded cable is strongly recommended for installations in harsh industrial
environments and/or in the presence of strong electrical fields.
CONNECTIONS
Network
A crossover cable simply
connects the differential
transmit pair on each end, to
the receive pair on the
opposite end.
Use a standard (direct) cable
when connecting to a hub or
switch port, which are
generally wired MDI-X.