The Panasonic EX-21A is a ultra-compact Photoelectric Sensor: Ultra-compact Photoelectric Sensor, Thru-beam, 1 m, NPN.
Compact photoelectric sensors are the standard way to detect parts on conveyors, in feeders and in assembly machines; the sensing mode, range and output type decide where a model can be used.
More Panasonic sensors, PLCs and servo parts: Panasonic range.
Technical data
| Model | EX-21A |
|---|---|
| Series | Ultra-compact Photoelectric Sensor EX-20 Ver.2 |
| Sensing range | 1 m |
| Sensing object | Min. dia. 2.6 mm opaque object (Setting distance between emitter and receiver: 1 m) |
| Repeatability (perpendicular to sensing axis) | 0.05 mm or less |
| Supply voltage | 12 to 24 V DC ± 10 % Ripple P-P 10 % or less |
| Current consumption | Emitter: 10 mA or less Receiver: 10 mA or less |
| Output | NPN open-collector transistor |
| Output: Utilization category | DC-12 or DC-13 |
| Output: Short-circuit protection | Incorporated |
| Response time | 0.5 ms or less |
| Operation indicator | Orange LED (lights up when the output is ON) (located on the receiver) |
| Stability indicator | Green LED (lights up under stable light received condition or stable dark condition), located on the receiver |
| Protection | IP67 (IEC) |
| Ambient temperature | -25 to +55 degrees -13 to +131 degrees Fahrenheit (No dew condensation or icing allowed), Storage: -30 to +70 degrees -22 to +158 degrees Fahrenheit |
At a glance
- Product details: Thru-beam[Front sensing]
- Emitting element: Red LED (modulated)
- Material: Enclosure: Polyethylene terephthalate Lens: Polyalylate
- Sensing object: Min. dia. 2.6 mm opaque object (Setting distance between emitter and receiver: 1 m)
Typical applications
- Counting and position checks
- Electronic component handling
- Assembly and packaging machines
- Replacement of an identical sensor on an existing machine
- Part presence detection on conveyors and feeders
Compatibility and replacement
Order with the complete Panasonic part number EX-21A; suffixes such as -P (PNP output), -C5 (5 m cable), -J (connector) or -R (rear sensing) change the version, so check the label of the old part.
The values in the table come from the official Panasonic Industry product data; if your old unit shows different values, send us a photo of its label and we will check it.
Before you replace it
- Sensing mode (thru-beam, retroreflective, diffuse)
- Cable or connector type
- NPN or PNP output
Frequently asked questions
What is the protection rating?
IP67 (IEC), according to the Panasonic product data.
What cable does it have?
0.1 mm2 3-core (emitter: 2-core) cabtyre cable, 2 m long, according to the Panasonic product data.
What is the response time?
0.5 ms or less, according to the Panasonic product data.
Can I get the datasheet?
The official manufacturer data is the source of the technical values above; we can send the datasheet with the quotation on request.
Can I get a price and delivery time?
Prices are quoted on request. Send the order number, quantity and delivery country on WhatsApp and we will reply with price and delivery time; air shipping is usually 5 to 7 days once ready, with a 1-year warranty.
Before you order
Compare the complete order number on the old unit with this page, including the suffix: in most ranges the last characters set the coil voltage, current range or version. If the label is worn, send us a photo and we will identify the part.
RendatSP ships from Yiwu, China, to factories worldwide; air delivery usually takes 5 to 7 days once the part is ready. The part is new and original with a 1-year warranty (shipping, payment and warranty). For a quotation, message us on WhatsApp with the order number and quantity. We also have agents in Saudi Arabia, Iraq, the UAE, Egypt, Oman, Libya, Morocco, Mauritania, Yemen, Algeria and Jordan.
