DI-500/510 Series and DI-750/760 Series Hardware Manual
Getting Started
10
For example, in the previous 64-channel example, the first or top bank of 32 channels now become channels A1
through A32 and the second (the bottom bank on portable models) bank of 32 channels become channels B1 through
B32.
The “channel 28” ambiguity disappears, the channel in question is either channel A28 or channel B28. Note that the
above table is for stand-alone instruments only. If you have several DI-500/510 or DI-750/760 Series instruments
multiplexed together, refer to the following section for labeling information.
Increasing the Total Analog Input Channel Capacity
The 37-pin connectors (labeled AUXILIARY PORT and EXPANSION on DI-500-16, DI-750-16, DI-510-48, and
DI-760-48 instruments, or EXPANSION IN and EXPANSION OUT on all other instruments) are used for system
expansion. Additional DI-500/510 and DI-750/760 Series instruments can be “daisy chained” together to increase
channel capacity. Up to 240 analog channels can be acquired by connecting combinations of DI-500/510 and DI-750/
760 Series instruments together. The following illustration shows a typical 128 channel configuration, consisting of a
DI-510-64 (64 input portable instrument) and a DI-510-64-X (64 input portable expansion unit):
When several instruments are connected together, one instrument becomes the “master” instrument and all others
become “slave” instruments. The “master” is always defined as the instrument connected directly to the PC. A
“slave” is defined as an instrument that is connected to the master (or not connected directly to the PC). Note that it is
possible to have any number of slave instruments in a configuration (up to 240 total channels), but always only one
master instrument. The expansion cable is always connected from the EXPANSION OUT port to the EXPANSION
IN port of the next instrument, moving in a direction away from the PC.
The DI-500-16, DI-750-16, DI-510-48, and DI-760-48 are master instruments only. They can be expanded (by adding
slave instruments) but they can never be used as a slave instrument.
All of the expansion instruments in the DI-500/510 and DI-750/760 Series (i.e., DI-510-32-X and DI-760-32-X) are
slave instruments. They have no printer port so they can never be configured as a master instrument (connected
directly to the PC) and cannot be used alone (they must be connected to a master instrument).
The DI-510-32, DI-760-32, DI-510-64, and DI-760-64 Instruments can be used as masters or as slaves. They can be
connected directly to the PC as stand-alone master instruments or they can be connected as slave channel expansion
Printer Port
To Printer Port of PC
Expansion IN
Expansion OUT
"Master"
DI-510-64
Expansion IN
Expansion OUT
"Slave"
DI-510-64-X
Expa
nsion Cab
le
Free Datasheet http://www.datasheet4u.com/
