Specifications

MESA CONTROL UNITS
There are three basic models of the MESA Control Unit: the MESA 4, the MESA 16 and the MESA 32. They
contain Power Supplies and an Expansion Motherboard. The Control Module and Expansion Interface Mod-
ules plug into the Motherboard so that one Control Module can control up to 32 Expansion Chassis.
The System shown in Fig. 1 has a MESA 16 Control Unit and four Expansion Chassis arranged and addressed
as a 32x16 Matrix. This leaves 12 additional ports to expand the system by adding twelve Expansion Chassis.
MESA 4 CONTROL UNIT
MESA 16 CONTROL UNIT
This is a 19" rack mountable chassis, 3.5" high and 12" deep
which will accept any of the Control Interfaces and 4 Expansion
Ports to control 4 Expansion Chassis. The Power Supply has
sufficient logic power to drive all 4 Expansion Chassis and re-
lay power to energize up to 200 relays at one time.
This is a 19" rack mountable chassis, 3.5" high and 12" deep
which will accept any of the Control Interfaces and 16 Expan-
sion Ports to control up to 16 Expansion Chassis as shown in
Fig. 1. The Power Supply has sufficient logic power to drive all
16 Expansion Chassis and relay power to energize up to 200
relays at one time.
MESA 32 CONTROL UNIT
This is a 19" rack mountable chassis, 7" high and 15" deep
which will accept any of the Control Interfaces and 32 Expan-
sion Ports to control up to 32 Expansion Chassis. The Power
Supply has sufficient logic power to drive all 32 Expansion Chas-
sis and relay power to energize up to 200 relays at one time.
RELAY POWER REQUIREMENTS
The 12 volt relay power supplied with the MESA Control Units is sufficient for most Matrix or Multiplex operations.
However, some applications require a larger number of switches to be closed. For these cases, two options are offered:
Auxiliary Power Supply or Powered Expansion Chassis.
POWERED EXPANSION CHASSIS
This is a separate 19" rack mounting chassis, 3.5" high and 12"
deep with +5 volt logic power for up to 32 Expansion Chassis
and relay power to energize up to 500 relays.
MESA-2
AUX-1 POWER SUPPLY
Where the power requirement in individual Expansion Chassis
is very high, each Expansion Chassis can be supplied with its
own relay power supply capable of energizing up to 200 relays
per Expansion Chassis.
CONTROL MODULES
The Control Modules are plug compatible with all the MESA control Units and have the same command
structures for Control and Switch Selections.
The commands for Mode Control are Latch, Unlatch, Matrix Mode, Mux Mode, Clear or Status Request.
The standard commands for selecting a Switchpoint are to select Matrix, Module and Switch.
These modules are available to control the MESA Units from TTL, IEEE488 BUS, RS232 Serial Port or 10Base-
T Ethernet LAN.
They include standard or special firmware for different configurations such as:
In a Matrix configuration, the command can be Input # and Output # selection for the crosspoint.
In a Multiplexer application, the command can be Channel # selection for one switch selection only.
LX/128-E #0 LX/128-E #1
LX/128-E #3 LX/128-E #2
0 thru 15 16 thru 31
0
thru
7
8
thru
15
0123456789
10111213
14
15
Expansion Ports
Mesa 16 Control Chassis
Remote Control
AC Input
DC
Power
Supply
Manual
Control
Expansion Interface Cable
Expansion Interface Cable
Fig. 1
MESA TO EXPANSION CHASSIS DISTANCE
Individual Expansion Chassis are normally supplied with 6 foot cables. The expansion chassis can be provided with ribbon
cables up to a length of 20 feet on request. Expansion chassis may be located up to 200 feet from the MESA if a better type
of cable is used. To discuss these options please contact CYTEC's sales staff.