5B01

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GENERAL DESCRIPTION

Model 5B01 Backplane

- The 5B01 diagrammed in Figure 1, is

a 16 channel backplane that provides single-ended, high level

analog input/output pins on the system connector. It is pin

compatible with Analog Devices’ 3B Series applications. (Note,

however, that 5B Series modules provide a +5V output swing

rather than the +10V swing provided by 3B Series modules.)

Model 5B01 System Connectors

– Signal connections between

the 5B01 backplane and the associated measurement and

control system are made at P1 and P2. These connectors are

identical electrically. The redundant connectors may be useful if

a 5B01 is used for both analog input and analog output and the

data acquisition system has separate input and output

connectors. A signal path is provided for each channel and, in

addition, a number of grounding pins are present in the

connector pin-out to provide inter-channel shield conductors in

the ribbon cable. In some cases, discussed below, the ground

conductors will not provide an accurate signal reference, so a

SENSE pin is also provided in the pin-out. Several jumper and

component options on the backplane provide optimum ground

connections for various circumstances.

Model 5B01 Grounding

– Each 5B01 backplane is factory

configured with Jumpers W1, W3, and W4 installed. Jumper

W1 grounds the shield wires in the ribbon cable (Pins 3, 6, 12,

15, 18, 21, and 24) at the 5B01 backplane. This will usually be

the primary ground connection between the 5B01 and the

measurement system. This connection is required if output

modules will be used on the backplane. It is also required is

there is no high impedance sense input (input Low of a

differential or pseudo-differential system) available on the

measurement system. Jumper W3 connects the sense input, if

available, to Pin 25 so that the 5B01’s ground is read. It can be

left in place at all times. Jumper W4 connects +5VDC power

common to input/output common (backplane measurement

ground). A connection between power common and

input/output common is important for the 5B Series modules to

function properly, however, if this connection is made elsewhere

in your system the best place is usually near the A/D or D/A

converters), W4 should be cut, since a ground loop could result.

Model 5B01 Inter-channel Bridge Jumpers

– The 5B01 gives

the user the capability of directing the voltage output of any

input module to an adjacent output module (e.g., Model 5B39)

simply by placing a jumper between the pins of the two

modules (input to channel n, output from channel n+1). This

feature can be used to provide an isolated current output from

an isolated input module, giving two levels of 1500 V rms

isolation. Model AC1344 provides ten jumpers.

.

Figure 2