B.9 I/O signal connectors
Warning: To avoid electric shock, all electrical connections to the rear panel must be
separated from hazardous voltages by double or reinforced insulation. Circuits of this
type are classified as safety extra low voltage (SELV). Examples of circuits that are
typically SELV include contact closure inputs and outputs for auto-samplers, and UV,
RI, and fluorescence detector signal outputs for LC-MS systems. The electrical
connections on the rear panel of this mass spectrometer are all SELV.
The instrument's rear panel includes two removable connectors that hold the screw terminals for
I/O signals. These connectors are keyed so they can receive a signal cable inserted only one
way.
Figure B–10: I/O signal connector I
Analog (Out)
Analog (Out)
Ground
Not used
Not used
Stop flow (Out)
Stop flow (Out)
Ground
Switch 2 (Out)
Switch 2 (Out)
January 10, 2022, 715006200 Ver. 01 (previously released as Rev. A)
Page 166
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