Barcode Reader User Manual

Specifications Appendix A
SC-2043-SG User Manual A-2 © National Instruments Corporation
Bridge type .................................................................. Half or full (jumper-selectable); with sockets for quarter-
bridge completion
Bridge completion....................................................... Two 2.5 kΩ, ±0.02% ratio tolerance
(±2 ppm/°C tracking TCR resistors)
Offset nulling range .................................................... ±5 mV, referred to input
Power Requirement (from DAQ Board)
2
+5 VDC (±10 %)
Using external excitation ............................................ 570 mA
Using internal 2.5 V excitation ................................... 600–770 mA
3
Physical
Dimensions.................................................................. 4.6 by 20.1 by 12.4 cm (1.8 by 7.9 by 4.9 in.)
I/O connectors
I/O signals ............................................................ 72 labeled screw terminals
DAQ board connector .......................................... Two 50-pin ribbon-cable connectors
Environment
Operating temperature................................................. 0° to 50° C
Storage temperature .................................................... -20° to 75° C
Relative humidity ........................................................ 5% to 90% noncondensing
2
Power requirements assume all eight inputs are used or shorted to their respective excitation return (-EXn) screw terminals.
Open-circuited inputs will increase power requirements.
3
When using internal excitation, the power requirement will depend on number and type of strain gauges. The maximum power
requirement listed (770 mA) assumes eight 120 Ω full-bridge inputs. The minimum power requirement listed (600 mA)
assumes one 350 Ω half-bridge input.