Agilent Technologies 4072A Advanced

Chapter 2 37
Agilent 4072/4073 Preinstallation Guide, Edition 4
Site Preparation
Emergency Off (EMO) System
Figure 2-19 Block diagram of emergency off circuit (208 V option)
Figure 2-20 Block diagram of emergency off circuit (220/240 V option)
relay1
instrument
power outlets
208 V
EMO protector
line
main contactor
ext.alarm 1: [NC]
ext. cntrl
ext.alarm 2:[NO]
cabinet fan (3ea)
+5 V
testhead fan
relay5
fan protector
relay3
relay2
system
switch
relay6
EMO panel
EMO SW
LINE
OFF SW
ON SW
INSTRUMENT POWER
white green
emergency breaker
line
earth
(green)
relay7
relay8
200 V
disconnect
device
power outlet
protector
trans.
for 208 V
power outlet
protector
power outle t
protector
DVM and CMU
power outlets
220 V
controller
power outlets
220 V
M
TH PS
+
relay4
trans.
ac 24 V
EMO de te ct
OVT detect
+-
10 A
10 A
2 A x 2ea
3 A
start MASK
~20 sec
fan speed sensor
fan speed sensor
(includes main breaker)
relay1
instrument
power outlets
220/240 V
EMO protector
neutral
main contactor
ext.alarm 1:[NC]
ext. cntrl
ext.alarm 2:[NO]
cabinet fan (3ea)
+5 V
testhead fan
relay5
fan protector
relay3
relay2
system
switch
relay6
EMO panel
EMO SW
LINE
OFF SW
ON SW
INSTRUMENT POWER
white green
emergency breaker
line
earth
(green)
relay7
relay8
200 V
disconnect
device
power outlet
protector
trans. for
220/240 V
power outlet
protector
controller
power outlets
220/240 V
M
TH PS
+
relay4
trans.
ac 24 V
EMO detect
OVT detect
+-
10 A
10 A
3 A
start MASK
~20 sec
fan speed sensor
fan speed sensor
(includes main breaker)