Keyence FS-N44P Dual Output PNP Expansion Fiber Sensor Amplifier
The Keyence FS-N44P adds two PNP control outputs to an existing FS-N40 amplifier group. As an expansion unit, it receives power and communication from a main amplifier. This design keeps panel wiring short while doubling detection capacity. Moreover, the built-in external input allows bank switching without extra hardware.
Technical Specifications
A red four-element LED at 660 nm provides the light source. The optical design holds stable emission across long fiber runs. FS-N44P supports eight response modes, from 23 µs (S-HSPD) to 64 ms (TERA). Therefore, one unit serves both high-speed registration and slow, dusty detection tasks.
Response time: 23 µs (S-HSPD) / 50 µs (HSPD) / 250 µs (FINE) / 500 µs (TURBO) / 1 ms (SUPER) / 4 ms (ULTRA) / 16 ms (MEGA) / 64 ms (TERA)
Control outputs: 2 (PNP open-collector)
External input: 1, input time 2 ms (ON) / 20 ms (OFF) or longer
Output rating: 30 V max, 100 mA max per output
Residual voltage: 1.6 V at 10 mA; 2.2 V at 10–100 mA
Unit expansion: up to 16 units (17 total including main; dual-output counts as 2)
Electrical and I/O Details
The amplifier operates on 10 to 30 VDC with 10% ripple P-P or less. It requires a Class 2 or LPS power source. Power draw stays at 990 mW or less, equal to 39 mA at 24 V. ECO ON reduces this to 920 mW, while ECO FULL reaches 830 mW. In addition, each open-collector output sinks 100 mA, which suits most PLC input modules and interface relays.
Mechanical and Environmental Parameters
The unit weighs approximately 73 g. Operating temperature spans -20 to +55 °C with no freezing. Thermal derating applies as more expansion units join the group. Besides, the slim housing mounts on standard DIN rail and fits dense control cabinets.
Installation Guide
First, slide the expansion unit onto the DIN rail to the right of the main amplifier. Next, join it to the previous unit with the expansion connector so power and data flow through. After that, wire both PNP outputs and the external input to the PLC. Finally, set thresholds and response modes through the OLED display, then verify detection with the real workpiece.
Route fiber cables away from high-voltage lines and respect the minimum bend radius. For long output runs, confirm the voltage drop stays within load tolerance.
Packaging List
FAQ
Q1: Can the FS-N44P work without a main unit?
A: No. It is an expansion unit and needs a main amplifier such as the FS-N43P for power and control.
Q2: How many amplifiers can one group hold?
A: A group supports up to 16 expansion units, for 17 total including the main unit. A dual-output model counts as two.
Q3: What does the external input control?
A: It supports bank switching and timing functions. The input accepts signals of 2 ms ON and 20 ms OFF or longer.
Q4: How do the two outputs differ from a single-output model?
A: The dual outputs allow two independent detection channels or complementary switching. This saves rail space compared with two separate units.
Q5: What shipping methods do you offer?
A: We ship by Fedex, UPS, or DHL. Most orders dispatch within 1–3 business days after payment confirmation.
