4.3 Receiver Specifications
Supply Voltage at the Device
+24 V DC ±15% (use a SELV-rated power supply according to EN IEC
60950)
Power supply must meet the requirements of IEC 60204-1 and IEC
61496-1.
Status Indicators
Bi-color (red/green) Status indicator: indicates general system and
output status
Tri-color (red/green/yellow) Zone Status indicators: indicate condition
(clear, weak, or blocked beam) of a defined group of beams and also
shows the scan code at start up
Output Signal Switching Devices (OSSDs)
Two redundant solid-state 24 V DC, 0.5 A maximum sourcing OSSD
(Output Signal Switching Device) safety outputs (use optional interface
solutions for AC or larger DC loads)
ON-State voltage: > Vin - 1.5 V DC
OFF-State voltage: 0 V DC typical, 1 V DC maximum (no load)
OFF-State, maximum allowed external voltage: 1.5 V DC
2
Maximum load capacitance: 1.0 µF
Maximum cable resistance to load: 5 ohms per wire
Maximum leakage current: 50 µA (with open 0 V)
OSSD test pulse width: 200 µs typical
OSSD test pulse period: 200 ms typical
Switching current: 0 A minimum; 0.5 A maximum (per OSSD)
Weak Beam Strength Output
Current-sourcing (PNP) solid-state output, 100 mA at 24 V DC
Supply Current (no load)
58 mA typical
82 mA maximum
3
Exclusive of OSSD1 and OSSD2 loads (up to additional 0.5 A each)
Residual Ripple
±10% maximum
Response Time
on page 8
Recovery Time
Blocked to Clear (OSSDs Off to On; varies with total number of sensing
beams and whether Sync beam is blocked).
on page 8
Controls and Adjustments
Scan Code Selection: 2 dual position switches, located in removable
cordset assembly, to select between scan codes (code 1 or 2). Factory
default position is code 1.
2
The maximum voltage allowed on the OSSDs in the OFF-state without a lockout occurring. This voltage may occur, for example, from the input structure of a safety relay module
connected to the S4B OSSDs.
3
Maximum current occurs at a supply voltage of 20 V DC.
S4B Safety Light Curtain
14
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