User manual

Getting Started 11Chapter 1
Chapter 1
Getting Started
Using This Chapter
This chapter describes the E1460A 64-Channel Relay Multiplexer module,
shows how to connect external wiring, and shows how to get started
programming the module using Standard Commands for Programmable
Instruments (SCPI). This chapter includes:
• Multiplexer Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
• Configuring the Multiplexer . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
• Configuring Terminal Modules . . . . . . . . . . . . . . . . . . . . . . . . .23
• Programming the Multiplexer . . . . . . . . . . . . . . . . . . . . . . . . . .29
Multiplexer Description
The E1460A is a VXIbus C-Size register-based product that provides
switching (multiplexing) of up to 64 two-wire channels. Switching consists

of connecting a channel’s HI and/or LO line to COM in that bank. The
multiplexer can operate in a C-Size VXIbus mainframe using a command
module (such as an E1406A Command Module).
Multiplexer
Components
The E1460A 64-Channel Relay Multiplexer module consists of a relay
switch card and a standard screw-type terminal module. The E1460A is also
available with Option A3E that provides a crimp-and-insert terminal housing
and connectors. Various configurations can be set by programming (closing)
certain switch card relays, and/or selection of wire jumpers on the relay
switch card and terminal module.
The E1460A is used when high switch densities such as wire harness/cable
testing, semiconductor testing, and/or printed-circuit board testing is
required. Although it is primarily a dual 32-channel two-wire multiplexer,

the module can be configured to perform one-wire, two-wire, three-wire, and
four-wire functions.
By using switch card wire jumpers, the banks can be changed from 1x32
to groups of 1x16 or 1x8. See "Configuring the Switch Card Wire Jumpers"
for more information.
For a SCPI environment, one or more multiplexer modules can be defined
as a
switchbox or as a scanning multimeter. For a switchbox configuration, 
all multiplexer channels within the instrument can be addressed using a
single interface address. For a scanning multimeter configuration, both the
multimeter and all multiplexer modules within the instrument can be
addressed using a single interface address.