Filter
Top Products
SECTION 14. INSTALLATION AND MAINTENANCE
14-10
Scientific offers the A21REL-12 Four Channel
Relay Driver (12 V coil) and the A6REL-12 Six
Channel Relay Driver with manual override (12
V coil) for use with the CR10.
In other applications it may be desirable to
simply switch power to a device without going
through a relay. Figure 14.10-2 illustrates a
circuit for switching external power to a device
without going through a relay. If the peripheral
to be powered draws in excess of 75 mA at
room temperature (limit of the 2N2907A
medium power transistor), the use of a relay
(Figure 14.10-1) would be required.
Other control port activated circuits are possible
for applications with greater current/voltage
demands than shown in Figures 14.10-1 and 2.
For more information contact Campbell
Scientific's Marketing Department.
FIGURE 14.10-1. Relay Driver Circuit with Relay
FIGURE 14.10-2. Power Switching without Relay