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VX4101A MultiPaq Instrument User Manual
programmed to connect it to the section above or below to produce a 1 × 60
4-wire multiplexor, a 1 × 120 2-wire multiplexor, or a 1 × 240 1-wire multiplex-
or.
VX4350 64-Channel SPST/SPDT Switching Module. This module provides 64
independent single-pole double-throw relays. A 0 W resistor is placed in series
with the common contact of each relay. This resistor may be replaced by a
resistor with a larger value to limit the current that flows through the relay in
order to protect the relay contacts. Pads are provided for optional metal oxide
varistors (MOVs). These varistors are connected from the common contact to the
normally closed contact, and from the common contact to the normally open
contact of each relay. Using the optional MOVs protects the relay contacts from
over voltage conditions encountered when switching electrical power to
inductive loads. The optional MOVs and current limiting resistors are user
installed, and are not available as factory options.
VX4351 40-Channel, 10 Amp, SPST Switch Module. This module contains 40 SPST
(form A) relays. Each relay may be controlled independently. The contacts of
each relay are connected to one of three 30-pin high current connectors which are
mounted on the module’s front panel. Circuitry is included on the VX4351 to
verify the control signals that are applied to each relay coil driver.
VX4380 256-Crosspoint Relay Matrix Module. This module provides four 4 × 16
2-wire matrix sections. Each section can be configured to connect either the four
rows or the sixteen columns to the section above or below it to produce up to a
16 × 16 2-wire matrix or a 4 × 64 2-wire matrix.
The VX4101A SurePathtMaster provides serial I/O interface for control of
SurePatht relay modules. It also monitors the power fuses of all SurePatht
Relay modules, and provides a serial input interface to identify each module that
it controls.
NOTE. There is a query for the VX4101A which will return a list of the
SurePatht family relay modules that the VX4101A SurePatht Master detects in
the system.