INFICON SQM-160 Thin Film Deposition Monitor - Manual (Page 47)

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SQM-160 Operating Manual
WARNING
The inputs are not isolated! The voltage level applied
must be limited to between 0 and +5 volts with respect to
Ground.
WARNING
Output relays are rated for 30 V
rms
or 30 V (dc), at 2 A
maximum. Proper fusing and adequate wiring insulation
and separation should be provided to assure these limits
are not exceeded.
Table 3-3 Relay I/O Connections
Pins Function Description
1,2
Relay 1
Crystal Fail Relay Contacts close when all enabled sensors have failed.
3,4
Relay 2
Time Setpoint, Dual
Sensor, or Sensor 2
Relay If Relay 2 is set to TIME in the System menu, contacts close when
timer counts down to zero from its programmed Timer Setpoint value.
If DUAL is selected, contacts close when Sensor 1 fails. If SENS2 is
selected, contacts close when shutter is pushed if Sensor 2 is
programmed for the active film.
5,6
Relay 3
Shutter
Relay Controlled by front panel shutter switch. Contacts close when Shutter
Open is selected. If SENS2 is selected for Relay 2 in the System
menu, the shutter relay contacts close only if Sensor 1 is programmed
for the active film.
7,8
Relay 4
Sampling or
Thickness Setpoint If Sampling is ON in System Menu, contacts close during Sample,
open during Hold. If Sampling is OFF contacts close when Thickness
Setpoint is reached.
9 Zero Timer
Input Grounding this pin zeroes the setpoint timer.
10 Zero Thick
Input Grounding this pin zeroes the thickness display.
11 Close Shutter Input Grounding this pin opens the shutter relay.
12 Open Shutter Input Grounding this pin closes the shutter relay.
13,14,15 Ground