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L4400 User’s Guide 267
L4433A example program segments, 116
L4433A hardware description, 120
L4433A instrument overview, 114
L4433A SCPI command summary, 115
L4433A simplified schematic (one-wire
mode), 126
L4433A simplified schematic (two-wire
mode), 122
L4433A terminal block (one-wire mode), 128
L4433A terminal block (two-wire mode), 124
L4437A
connector pinouts, 135
power-fail jumper, 130
snubber circuitry, 136
terminal block, 136
L4437A example programs, 133
L4437A hardware description, 134
L4437A SCPI command summary, 132
L4437A simplified schematic, 134
L4437A temperature sensor, 130
L44387 instrument overview, 130
L4445A
channel numbering, 149
channel pairing, 153
continuous drive mode, 152
default and reset states, 158
description, 144
dimensions, 193
distribution boards, 160
drive modes, 151
dual drive mode, 153
example configurations, 145, 146
execution times, 155
I/O Access LED, 146
LED position indicators, 155
open-collector drive mode, 151
pulse drive mode, 154
recovery time, 154
settling time, 154
single drive mode, 152
switch verification, 155
TTL drive mode, 151
L4445A example programs, 194
L4445A SCPI command summary, 142
L4450A
buffered input, 218
buffered output, 216
byte ordering, 220
channel drive voltage, 208
channel numbering and width, 206
channel polarity, 208
channel threshold, 208
channel width, 208
clock output, 224
connector pinouts, 224
counter operations, 222
deleting traces from memory, 218
external pullups, 208
frequency measurements, 223
handshake line drive mode, 210
handshake line output voltage level, 210
handshake line polarity, 210
handshake line threshold, 210
handshaking, 209
handshaking digital data, 209
initiated measurement mode, 223
interrupt lines, 219
memory operations, 216
pattern matching, 221
reading digital data, 206
synchronous handshake mode, 211
totalizer mode, 222
writing digital data, 207
L4450A digital I/O operations, 206
L4450A hardware description, 205
L4450A SCPI command summary, 198
L4451A
analog output adjustments, 257
analog output verification test, 255
calibration count, 252
calibration interval, 248
calibration message, 252
calibration procedure., 253
calibration security, 249
calibration time, 249
connector pinouts, 232
example programs, 228
overload fuse, 224
performance verification, 254
remote sensing, 224
security code, 249
sense terminals, 224
simplified block diagrams, 231
L4451A hardware description, 224
L4451A SCPI command summary, 226
L4452A
analog output, 236
calibration count, 252
calibration interval, 248
calibration message, 252
calibration procedure, 261
calibration security, 249
calibration time, 249
connector pinouts, 244
DAC output adjustment, 262
DAC output verification test, 262
digital I/O, 236
example programs, 241
hardware description, 236
performance test verification, 261
security code, 249
simplified block diagram, 243
totalizer input, 236
L4452A SCPI command summary, 237
labels, 68
LAN, 48
LAN cables, 18
private network connections, 19
site network connections, 20
LAN default states, 45
LAN network
considerations, 17
selecting, 17
LAN reset, 48
LAN settings
editing using the Web interface, 30
latch mode (alarms), 88
LED descriptions, 48
LED position indicators
L4445A, 155
limits
alarms, 84
linking multiple modules, 118
locating instruments, 22
lost calibration code, 250
M
manual scanning, 73
master module, 144
measurement functions
L4421A, 102
memory
stored states, 96
viewing alarm data, 87
memory operations
L4450A, 216
memory storage, 69
monitor mode
applicable instruments, 80
N
network connections
private LAN, 19
site LAN, 20
network considerations, 17
non-sequential scanning
applicable instruments, 79
O
odometer, 98
operating conditions, 3, 66
operating environment, 2
overload fuse
L4451A, 224
P
paths (sequences)
catalog, 95
defining, 89
deleting, 95
executing, 93
executing on alarm, 94
querying definition, 93
valid commands, 90
pattern matching
L4450A, 221
performance test verification
L4452A, 261
performance verification
L4451A, 254
pinouts