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Operating Instructions-TM 506
Loading Considerations
With six plug-in modules installed, the TM 506 can
require up to 320 watts from the line at high-line voltage
range settings . Actual power consumed, of course,
depends on the particular module combination selected at
any one time .
3. Pull the PULL ON POWER button on the right side of
the TM 506. Some plug-in modules have independent
power switches, usually labeled OUTPUT, controlling
application of mainframe power to the module . Push this
button to activate the plug-in module .
Family Compatibility
Mechanically, the plug-in modules are very similar to
other Tektronix product families . However, they are not
electrically compatible . Therefore, the TM 506 interface
has barriers on the mating connectors between pins 6 and
7 to ensure that incompatible modules cannot be inserted .
See Fig . 1-1 . A compatible module will have a matching
slot between pins 6 and 7 of its main circuit board edge
connector. This slot and barrier combination is the
primary keying assignment .
TM 500-compatible plug-in modules are also identified
by the white color of the release latch.
Customizing the Interface
The modularity of this instrumentation system provides
for many different functions to be performed by the plug-
in modules . Specific functions are grouped into families or
classes, of which there may be several plug-in module
members. For instance, some classes are Power Supplies,
Signal Sources, Measurement, and so forth . Each modular
member of a functional family will have a second slot
peculiar to its family assignment located in its edge
connector. The TM 506 user can "program" one or more
compartments to accept only members of that family by
installing a second barrier in the interface connector to
match the module's slot location . An entireTM 506can be
"programmed" in this manner to set up instruction
systems for specific work functions. For extra barriers,
order Tektronix Part No . 214-1593-02.
Jumper wires can be used to further specilize the
interface . Compartments can be made to "talk" to each
other by connecting jumpers on the back side of the
BUILDING A SYSTEM
This power capability can best be utilized by carefully
planning the functional combinations of plug-ins, their
external loads, and the resulting power distributions.
Optimum conditions can be (1) equal loads in all five left
hand compartments and full load in the high power
compartment, (2) as much of the consumed power as
possible dissipated in external loads, and (3) operating in
an ambient tempterature of about 25°C .
The TM 506 provides each plug-in module with access
to a pair of heat-sinked, chassis-mounted, series-pass
transistors, one NPN and one PNP. These transistors
allow the plug-in modules to operate in power ranges not
possible if the power were to be dissipated within the
modules.
interface board, using pins 14 through 28 (A-side and B-
side both) of the interconnecting jacks. Seethe following
description of Option 2 . Refer to each plug-in module's
Manual for the I/O assignments of each pin at the rear
interface. Once having made interconnections of a
specialized nature, it is recommended that barriers be
installed on the interconnecting jacks to ensure module
compatibility with the customized wiring .
Rear Panel
The rear subpanel has a connector mounting plate for
BNC and multi-pin connector mountings . Customer or
factory-installed connectors and wiring (see following
description of Option 2) could provide external access to
the interface for external I/O control. This feature makes
the TM 500 Series Modular Instrumentation System very
flexible in bench-top or rackmounted systems.
Option 2. This factory-installed option adds 25-mil
square-pin connectors to the rear of the interconnecting
jacks at all pin locations froms pins 14A and B through
pins 28A and B. This will keep the interface flexible by
making it easy and fast to change customized wiring using
prepared wireswith square-pin receptacles and long-nose
pliers or tweezers . It also protects the circuit board from
damage by repeated soldering and unsoldering of jumper
wires. This option also adds six BNC connectors and one
50-pin connector to the rear panel. These connectors are
not pre-wired. Instead, prepared jumpers, coaxial cables,
and interconnection jack barriers are included in a kit.
This gives a system designer as much flexibility as
possible .
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