Agilent Technologies 11713B, Operating And Service Manual, Page: 36 / 114

36 11713B/C Operating and Service Manual
2
Installation
Driving Relays
• To drive ten devices for 11713B, connect attenuator cables at
ATTEN X and Y and switch cables to S9 and S0.
• A total of 10 relays may be on at one time if the total curent is
less than 1.7 A. However, since there are dual transistor and relay
drivers, where one driver is on while the other is off, a total of 20
relays may be controlled.
• Figure 11 below shows the connections for a simplified relay
driving circuit. The circuit is adaptable for simple non- latching
relays.
N O T E
11713C is capable of driving double the amount of devices that 11713B can.
However, the total load current can be consumed is still 1.7 A.
C A U T I O N
If the total load current of 1.7 A is exceeded, damage may result.
Figure 11 Typical connection for relay driving circuit
N O T E
It is also recommended that two 28.7 V zener diodes be connected back-to-back
across the relay coils to reduce voltage transients.