Overview - Gilson VERITY 1910 MS User Manual

Overview

The auxiliary I/o port (Aux I/o) is located at the rear of the VERITY® 1910 MS Detector. Refer
to Rear Panel Connections on page 24. The port can be used to supply and receive analog
voltages and also to send/receive triggers. The port is a 15-way, D-type male socket and is
shown in more detail in Figure 42.
The port contains two optically isolated digital inputs and two optically isolated digital
outputs. The digital inputs require 10mA to activate, this can be supplied via the 5V reference
also available at the connector. Refer to Auxiliary I/O Port Pin Assignments on page 83. The 5V
output is protected by a resettable fuse which trips at 100mA. The digital outputs are open
collector, and are rated at 50mA. The port also houses four optically isolated analog inputs
and four optically isolated analog outputs. The inputs have an impedance of 100K, and the
outputs can source or sink 10mA. Both the inputs and outputs have ranges of 0 to +1V full
scale.
Warnings
CAUTION
WARNING
WARNING
Both the analog and digital parts share a common ground and all the inputs and outputs
are isolated from the main system ground with components rated to at least 1000V. This is a
protection measure only, and operation with different ground voltages is not recommended.
Auxiliary I/O Port Pin Assignments on page 83 lists the auxiliary port pin numbers and
associated signals, along with a description. Refer to this table if you have been supplied with
an open ended cable for development purposes. Wires will either be colored or numbered as
appropriate identifiers.
82
AUxIlIARY I/o
Figure 42
Auxiliary I/O Port
Any external instrument sending/receiving triggers and/or analog voltages to
the VERITY 1910 MS Detector should not exceed the input/output values stated
here. Gilson is not responsible for any damage to external instrumentation from
improper connections made to the VERITY 1910 MS Detector.
Connecting terminals are separated from mains circuits by reinforced insulation.
The terminals must only be connected to external circuits that are themselves
separated from mains voltages by at least double/reinforced insulation.
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VERITY® 1910 MS DETEcToR