Confidential
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Electrical Connections
The three connectors located on the back of the MMXI controller box are listed below:
Line supply input
The power entry module must be provided with a clean 100VAC at 50-60 Hz. The power
switch and fuse drawer are also incorporated into the power entry module. Under normal
operating conditions, the fuses should not blow. If it is found that a fuse has blown, notify
Multimetrixs. If a fuse needs replacement, it should be replaced with 0.5 Amp fuses only.
Fuse replacement does not require any tools. To replace the fuses, just slide out the
fuse drawer between the power socket and the power switch and slide it back in after
replacing the fuses.
RST Sensor port
The larger Dsub connector is for connection to the Multimetrixs RST Sensor that was
supplied with the MMXI controller. No other devices should be connected to any part of
this port as it could damage the controller and or the connected device. Using this port
with anything other than the supplied Multimetrixs RST sensor may void the warranty and
may be deemed as an attempt to undermine the security of Multimetrixs’ intellectual
property.
RS232 Host port
The smaller (9-Pin) Dsub connector is meant for connection to a host PC for control of
the MMXI box via the serial command protocol described in the following section. The
connector should be wired to the DB9 RS232 port connector of the host PC pin for pin
with a “straight thru” serial cable (Do not use a NULL modem cable). At a minimum, RX,
TX, and Gnd must be connected. When using hardware flow control, the RTS and CTS
signals will become active and the DTR, DSR, and DCD signals are tied together. By
default, flow control is disabled. The default baud rate from the factory is 115200 with 8
data bits, No parity, and 1 stop bit. The baud rate may be changed with serial
commands.
