Agilent Technologies 8495 Operating And Service Manual page 13

Agilent 8494/95/96G/H Attenuators Operating and Service Manual
Each solenoid requires a drive of 20 V to 30 V with a switching
current of approximately 125 mA
solenoid switching time is less than 20 milliseconds including
settling time. Once switched, the solenoid plungers are held in
place by permanent magnets and the solenoid plungers
automatically disconnect the selected coil drive and connect the
opposite coil drive (see
coil driver circuit design and reduces the amount of heat
dissipated by the solenoid coils since the solenoid coils are
energized only for the 20 milliseconds switching time.
Solenoid driver
Any 75451 dual peripheral AND driver.
TTL Input
1820-0175
+5 VDC
Typical Solenoid IC Driver Circuit
(3 or 4 required)
Switch or relay
contacts
Figure 2 Typical Solenoid Coil Driver Circuits
[1] For serial number prefixes below 1722A, change 125 mA to 110 mA.
[1]
at 24 Vdc per section. The
Figure 1 and Figure
+24 V
+24 Vdc
Typical Solenoid Relay or Switch Driver
(3 or 4 required)
Introduction
2). This simplifies the
Solenoid cable
connector jack
Atten card pin
Solenoid drive pin
Thru-line pin
Atten card pin
Thru-line pin
Solenoid drive pin
1
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