Keysight SL1200A Series Operating Instructions Manual page 10

Safety and Regulatory Notices
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Safety relay
• Inside the system
• Responds when the local emergency stop switch or external
emergency stop input via the higher-level safety device are
triggered (2-pin each)
• AC supply of the power stages is interrupted, undervoltage
monitoring triggers, main switch on "Trip" → system is switched
off; power stage enable is withdrawn; 230 V auxiliary voltage and
24 V control voltage are maintained (logic path)
• Increased Safety function (optional)
When the circuit breaker is switched on (main switch OFF), the
safety relay checks all safety-relevant switching components. If
an error is detected, the system cannot be switched on via the
main switch.
Housing ground/functional earth
• On the rear side of the system
• Connection and coupling of housing ground
• Connection for EMC-compliant design
Display Soft Front Panel power stage
• On the front side
• Display is activated when power stage is active/in operation
• No settings needed
Signal lamp (default setting)
• On the top of the system
• Connection via plug
• red:
yellow:
green:
NOTE
NOTE
Scienlab Regenerative AC Emulator – SL1200A Series – Operating Instructions
failure signal
active signal
standby/ready signal
If the status of the configurable buses is
different, several lights can be lit
simultaneously.
In parallel operation (up to 9 systems), in the
event of a fault, the director, and if applicable
the corresponding follower with the fault, goes
into error status (red light). All other systems
switch to the ready status (green light). All
other systems switch to the standby/ready
status (green light).