
MNL000443.doc
Revision 00
09/19/2016
© Versum Materials, Inc. as of the revision and date shown. All rights reserved.
Confidential and Proprietary Data
Page
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The MMMS Network Interface Box consists of a rack enclosure which contains a
RS232 communications processor and a bank of RS-485 converter boards. The cabling
which connects to the cabinet and VMB controllers is terminated to the rear of the RS-
485 converter rack via screw terminals. Each of the 16 ports is provided with a set of
screw terminals. The RS232 communications processor has a single 10BASE-T
Ethernet connection and an AUI type Ethernet connection on its rear apron. This
Ethernet connection is used for connecting the communications processor to the
MMMS Station. The provided AUI port can be used in installations where the
Ethernet connection available is other than 10BASE-T, and accepts a variety of
standard Ethernet converter modules.
The MMMS Network Interface Box was designed to allow front and back access to the
rack mounted components, even if the assembly was wall mounted. To accomplish
this, the box is double hinged, and contains conduit penetration areas on the top and
bottom of the rear stationary section. This conduit area is used for the connections to
the RS-485 signal wires (to the cabinets), Ethernet, and for power connections.