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Using This Chapter
Form C Switch Description
Basic Operation
Chapter 1
This chapter gives guidelines to get started using the E1463A 32-Channel,
5 Amp Form C Switch module (Form C switch), including:
•
Form C Switch Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
•
Configuring the Form C Switch. . . . . . . . . . . . . . . . . . . . . . . . .14
•
Configuring a Terminal Module . . . . . . . . . . . . . . . . . . . . . . . . .18
•
Protecting Relays and Circuits . . . . . . . . . . . . . . . . . . . . . . . . .23
•
Programming the Form C Switch . . . . . . . . . . . . . . . . . . . . . . .27
The E1463A 32-Channel, 5 Amp, Form C Switch module (Form C switch)
is defined as a VXIbus instrument. VXIbus plug-in modules installed in a
mainframe or used with a command module are treated as independent
instruments each having a unique secondary address.
Each instrument is also assigned a dedicated error queue, input and output
buffers, status registers and, if applicable, dedicated mainframe/command
module memory space for readings or data. An instrument may be
composed of a single plug-in module (such as a counter) or multiple plug-in
modules (for a switchbox or scanning multimeter instrument).
The Form C switch is a C-Size VXIbus and VMEbus register-based product
that can be used for switching, scanning, and control. The switch can
operate in a C-Size VXIbus or VMEbus mainframe. The switch has 32
channels of Form C relays. Each channel includes a relay with common (C),
normally open (NO), and normally closed (NC) contacts.
For the Form C switch, switching consists of opening or closing a channel
relay to provide alternate connections to user devices. Scanning consists
of closing a set of relays, one at a time.
As shown in Figure 1-1, the Form C switch module consists of 32 channels
(channels 00 through 31). Each channel uses a nonlatching relay. Varistors
(MOVs) can be added for relay protection and resistors or fuses can be
added for circuit protection. See "Adding Relay and Circuit Protection" for
more information on protecting relays.
External pull-up resistors can also be added for digital output applications.
See "Digital Output Configuration" for additional information about these
applications.
Chapter 1
Getting Started
Getting Started 11
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