Accom ASWR8150, Техническое руководство

Страница: 71 / 236

Tally Connector
All Tally outputs are opto-isolated open-collector outputs.
Opto-isolators have limited current capability to drive some relays or
tally lamps. An external drive interface is needed for applications that
need greater current than that supplied by the opto-isolator output. (See
Figure 2-11 for an example current driver circuit.) Figure 2-12, below,
shows a tally relay interface using locally available parts, or you can
obtain them from Accom.
Electrical Specifications
The following specifications are for the opto-isolator (device # 4N33)
used in the 8150.
OUTPUT DETECTOR MAXIMUM RATINGS
Collector - Emitter Voltage (V
CEO
): 30 V.
Emitter - Collector Voltage (V
ECO
): 5 V.
Collector Current - Continuous (I
C
): 150 mA.
Power Dissipation (P
D
): 150 mW.
Isolation Surge Voltage (Peak AC Voltage, 60Hz, 1 Second Duration):
7500 V.
Figure 2-12 Typical Tally Output Circuit
8150 Technical Guide Signal Chassis Connector Detail
9100-0212-04 - May 2000
Installation
2-31