INFICON STC-2002 Thin Film Deposition Controller Operating Manual - Manual (Page 141)

p STC-2002 DEPOSITION CONTROLLER y
SECTION 4.XX e page 139 of 276 ^
A ground post is provided on the rear panel. This point should be connected to the
deposition system ground with the shortest convenient length of heavy gauge wire or flat
braided cable. This connection is not required for normal operation but will make the unit less
susceptible to transient noise and it is highly recommended that it be installed. Refer to
figure below for an example of proper installation.
CHAMBER
CRYSTAL SENSOR
CHAMBER GROUND
WARNING !
The power cord protective grounding conductor must be connected to ground. No user serviceable parts inside. Refer servicing to qualified personnel.
FUSE: 2 x 2.00 AMP QUICK-ACTING (F) 250v 90-264 vac, 50-60 Hz, 230VA MAX
INPUTS / OUTPUTS
SOURCE
SENSORS I/O 4 1/O 3 I/O 2 I/O 1
COMM OPTION
RS232
MEM
instruments
7 5 3 1
8 6 4 2
7 5 3 1
8 6 4 2
EVAPORATOR
POWER SUPPLY
Figure- 4.3: Recommended Grounding
CONNECTOR INSTALLATION
Connector Shielding
In systems with a high electrical noise environment, attention needs to be given when wiring
connectors. A little extra time spent here can save hours of frustration later. Sycon provides mating
connectors with each instrument. For best results, use a shielded multi-conductor cable. On the D-
subminiature connectors that are supplied with the units, the metal shells each come with a set of four
grommets. Pick the grommet for the size cable you are using. After making the desired electrical
connections, remove an additional 3/4 inch of the outer insulation of the cable to expose the cable shield to
the grommet. Because the grommet is conductive, just clamping it between the metal shell is sufficient to
complete the shielding of the cable.
Figure 4.2 shows the Input/Output card card slots (labeled 1, 2, 3 and 4). The typical installation has
slot 1 filled with an input card and slot 2 filled with an output card. Figure 4.2 also shows the Sensor card
slots (labeled in the figure as: A, B, C, D). The standard installation has slot 1 filled. Each sensor card has
2 crystal inputs and 2 identical control voltage outputs. Each of these control voltage outputs are both
isolated and single ended. In a standard STC-2002 (with 1 sensor card), the control voltage outputs may be
configured such that one output is programmed and intended as a process control voltage while the other
control voltage output is programmed and intended for use on a strip chart recorder. Back panel
designations for slot 1 are: "1" and "2" for sensors 1 and 2 in the area labeled "SENSORS" while in the
area labeled "SOURCE", "1/2" indicates source control voltages 1 and 2 on one 9 pin D-sub female.
Back panel designations for slot 2 are: "3" and "4" for sensors 1 and 2 on the second sensor card in the
area labeled "SENSORS" while in the area labeled "SOURCE", "3/4" indicates source control voltages 3
and 4 (1 and 2 on the second sensor card). There are 4 slots for Input and/or Output cards. There are 4 slots
for Sensor cards.