Accom ASWR8150, Technical Manual

Page: 70 / 236

GPI Outputs
All GPI outputs work as solid state opto-isolated switch closures.
Opto-isolators have limited drive current capability, so some form of
external drive interface is needed for applications that need greater
current than that supplied by the opto-isolator output. Figure 2-11,
below, shows an example current driver circuit you can build. The
2N2222 general purpose transistor provides up to 650mW of drive.
Check all applicable data sheets for the external devices shown below
before building your current driver.
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 2-11 Typical GPI Output Circuit
Signal Chassis Connector Detail 8150 Technical Guide
2-30
Installation
9100-0212-04 - May 2000