Omron S8AS, User Manual

Page: 21 / 146

3
Overview of Features and Functions
Section 1-1
■
S8AS-24006
@
(240 W, 6 Branch Outputs)
■
S8AS-48008
@
(480 W, 8 Branch Outputs)
Power Supply and Branch Outputs
The power supply section incorporates the highly praised AC-DC conversion
circuit of the S8VS Switch Mode Power Supply in order to produce stable 24-
VDC power.
The branch output circuits consist of the protection circuits and tripping cir-
cuits of the S8M Digital Circuit Protector. They support various safety func-
tions, such as overvoltage protection, overcurrent protection, and short-circuit
protection, as well as maintenance functions, such as monitoring using the
seven-segment display, error indications, and various alarm outputs.
Models that support communications can be monitored from a host computer
using RS-485 communications.
Branch Output Tripping Circuits
No-contact Switching The S8AS built-in circuit protectors differ from conventional mechanical con-
tact-type circuit protectors in that they use no-contact transistor relay switch-
ing. Without the contact life of mechanical circuit protectors, semiconductor
relays are able to provide a much longer lifetime. Digital processing also pro-
vides other benefits, such as being able to specify detailed overcurrent detec-
tion conditions.
115 mm
160 mm for models
with 6 branch outputs
230 mm for models with 8 branch outputs
115 mm
Conventional contact-
style circuit protector
S8AS built-in circuit
protector
Overcurrent tripping
mechanism
Overcurrent
detection circuit