Barcode Reader User Manual

Chapter 3 Signal Connections

Table 3-2. Pin Assignments for the Lab/1200 I/O Connector (Continued)

Pin Numbers Lab/1200 Connector

Signal Names

38 EXTTRIG

39 EXTUPDATE*

40 EXTCONV*

41 OUTB0

42 GATB0

43 OUTB1

44 GATB1

45 CLKB1

46 OUTB2

47 GATB2

48 CLKB2

49 +5 V†

50 DGND†

† These signals are not routed to screw terminals. All other signals on the I/O connectors are routed directly to

screw terminals (J1–J6) for convenient signal termination.

Table 3-3. MIO (J10) I/O Connectors Signal Summary

Signal Name Pin Number Description

AIGND 2 Analog Input Ground—This pin provides the AC noise current return

point for the analog circuitry and for the onboard excitation supply. It is

also routed to a screw terminal.

AISENSE 19 Analog Input Sense—This pin is the reference node for the conditioned

strain gauge bridge signals. It is also routed to a screw terminal to

provide a reference for analog inputs on channels ACH<8..15>.

AISENSE is directly connected to the excitation supply return and is

earth-grounded. This makes AISENSE a low impedance reference;

therefore, all signals referenced to it MUST be floating.

ACH<0..7> 3, 5, 7, 9, 11,

13, 15, 17

Analog Input Channels 0 through 7—These pins carry the conditioned

strain gauge bridge signals (referenced to AISENSE) to the DAQ board.

They are not routed to screw terminals.

DGND 24

Digital Ground—This pin is the reference for the +5 VDC power supply.

It is also routed to a screw terminal to provide a reference for the digital

signals at the screw terminals.

This pin establishes the DC return path for the onboard excitation supply.

It is not routed to a screw terminal.

+5 V 34 +5 VDC Source—This pin provides DC power for the SC-2043-SG from

the MIO or MIO E Series board. It is not routed to a screw terminal.

Others Others The remaining pins are routed directly to screw terminals to provide easy

access to the additional analog, digital, and counter/timer I/O signals of

the DAQ board. Refer to the Signal Connections chapter in your DAQ

board user manual for pin descriptions.