Limit Setting Warning - HP 4262A Operating And Service Manual

Model 4262A
Section III
Paragraphs 3-52 and 3-53
(7) COMPARATOR ENABLE Switch: This
switch enables the Option 004 to compare
measured data with HIGH and LOW limits
under a fixed range condition (LCR or D/Q
RANGE switch set to MANUAL). If LCR
RANGE switch or D/Q switch is set to
AUTO, depressing COMPARATOR EN¬
ABLE switch changes LCR or D/Q RANGE
switch setting to MANUAL.
If AUTO key of LCR or D/Q RANGE
switch is depressed while COMPARATOR
ENABLE switch is ON, one measurement
cycle is done in AUTO ranging and the
range is fixed to that selected in this meas¬
urement cycle.
3-52. LIMIT Setting Warning:
If HIGH
LIMIT setting is lower than LOW LIMIT setting,
HIGH and LOW lamps of decision output
repeatedly turn ON and OFF to warn operator to
change LIMIT setting.
3-53. DATA OUTPUT Connector Decision Output:
Decision outputs in TTL open collector signal and
in relay contact are supplied through COMPARA¬
TOR OUTPUT connector on the rear panel. Signal
pin assignment is given in Figure 3-44.
WARNING I
DO NOT APPLY AC LINE VOLT¬
AGE TO RELAY OUTPUT CON¬
NECTOR PIN TO SWITCH LINE
CURRENT. For such relay appli¬
cations, remotely control an ex¬
ternal relay with relay output.
Relay Contact Ratings
AC DC
Contact Resistance lOOmfi lOOmft
Maximum Permissible
Power
30VA 20W
Maximum Permissible
Voltage
110V 30V
Maximum Permissible
Current
0.3A 1A
Actuation Life
> 10 million
> 1 million
Decision Output Data Format
Decisions
Relay output pins TTL output pins
DQ LCR
13 i?
DQ LCR
14 18
DQ LCR
39 43
DQ LCR
15 19
DQ LCR
16 20
DQ LCR
41 45
HI
s o
0
H
L
L
IN 0 0 s
L
L H
LO
0 s 0
L H L
S: Short O: Open
Referenced to common (pin 38 or 42).
TTL Output sink current: 30mA max.
3-31