©
National Instruments Corporation I-1 NI 2501/2503 User Manual
Index

Numbers

1_WIRE_LO_REF signal (table), 1-9
+5 V signal (table), 1-9

A

AB<0..1>± signal (table), 1-9
AB0± signal (table), 1-9
AB0A± signal (table), 1-9
AB0B± signal (table), 1-9
accessories for NI 2501/2503, B-1
amplifier for NI 2501, 1-3
analog bus, 1-2
analog bus connectors, for terminal blocks, B-1
architecture drawings, D-1to D-3

B

block diagrams
NI 2501 module, 2-2
NI 2503 module, 2-3
bulletin board support, F-1

C

CA-1000, B-1
cable, SH68-68S, B-1
calibration data, storing in EEPROM, 1-3
CE Mark Compliance, A-4, A-7
CH<0..23>± signal (table), 1-9
CH<0..47> one-wire signal (table), 1-9
CH<0..11>A± signal (table), 1-9
CH<0..11>Β± signal (table), 1-9
CJS± signal (table), 1-9
COL<0..5>± signal (table), 1-9
cold-junction sensor channel, 1-3
COM<0..3>± signal (table), 1-9
COM<0..1>Α± signal (table), 1-9
COM<0..1>B± signal (table), 1-9
COM0± signal (table), 1-9
common questions, E-1to E-2
connecting signals. See signal connections.
contact protection (caution), 1-10
conventions used in this manual, v
current-loop receivers, C1to C-2
customer communication, F-1to F-2
customizing NI 2501/2503, C1 toC-2

D

debounced switches, 1-2
dynamic characteristics
NI 2501, A-2 toA-3
NI 2503, A-6

E

electrical hazards
exceeding maximum settings (warning), 1-4
static electricity (caution), 1-4
electronic support services, F-1to F-2
e-mail support, F-2
environmental specifications
NI 2501, A-4
NI 2503, A-7
external trigger input, 1-2, 2-6to 2-7
EXT_TRIG_IN signal (table), 1-9, 2-6

F

fax and telephone support numbers, F-2
Fax-on-Demand support, F-2
flyback voltages (caution), 1-10
four-wire multiplexer, 1-7, 2-5