DD-670 Series Plug-In Slot Photoelectric Switch
The slot sensor your maintenance team will thank you for: unplug the failed unit, plug in the spare, restart the line.
- Plug-in connector body — replacement without rewiring
- 5 mm detection slot (7 mm slot width), infrared through-beam
- 5 housing styles incl. two close-mounting types
- NPN or PNP × indicator logic: N / P / NA / R versions
- Light-ON / Dark-ON set by the connector (L) terminal
Designed Around the Two Minutes That Matter
Over a slot sensor's life, the expensive minutes are not the ones spent detecting flags — they are the ones spent replacing it while a line waits. Lead-wire sensors turn that into an electrician job: open the cabinet, disconnect, re-terminate, test. The DD-670 series moves the interface to a plug-in connector on the sensor body itself, so the harness never moves and the swap is a hand operation.
The ordering matrix is deliberately regular: 5 housing styles (standard, L-type, T-type and two close-mounting bodies for side-by-side arrays) × 4 output/indicator versions (NPN or PNP, indicator on light-received or beam-blocked) = 20 part numbers. On top of that, the (L) terminal lets any unit run Light-ON or Dark-ON by wiring alone — one spare covers both logics.
One physical unit, two logics: the (L) terminal decides Dark-ON or Light-ON at the harness, independent of the part number.
Model Selection Table — 20 Part Numbers
| Models | Detection Method / Housing | Detection Slot | Output Versions |
|---|---|---|---|
| DD-670N / P / NA / R | Through-beam slot, plug-in connector — standard housing | 5 mm slot (7 mm slot width) | N=NPN·Light-ON ind. / P=PNP·Light-ON ind. / NA=NPN·Dark-ON ind. / R=PNP·Dark-ON ind. |
| DD-671N / P / NA / R | Through-beam slot, plug-in connector — L-type housing | 5 mm slot (7 mm slot width) | Same four output/indicator versions |
| DD-672N / P / NA / R | Through-beam slot, plug-in connector — T-type housing | 5 mm slot (7 mm slot width) | Same four output/indicator versions |
| DD-673N / P / NA / R | Through-beam slot, plug-in connector — close-mounting type 1 | 5 mm slot (7 mm slot width) | Same four output/indicator versions |
| DD-674N / P / NA / R | Through-beam slot, plug-in connector — close-mounting type 2 | 5 mm slot (7 mm slot width) | Same four output/indicator versions |
Light source: infrared. Operation logic on every model: (L) terminal open = Dark-ON, (L) shorted to V+ = Light-ON. Response frequency, supply voltage, current and IP rating are not published for this series — contact the factory to confirm against your application.
Note: general-purpose detection sensors, not IEC 61496-certified safety components — do not use them alone for personnel protection.
Typical Applications
Home / Origin Position on Automated Machines
A flag through the 5 mm slot gives a repeatable reference; a failed unit is unplugged and replaced in seconds during production.
Cam & Indexing-Table Flag Detection
Classic photomicrosensor duty — the through-beam slot reads each vane pass regardless of flag colour or finish.
Feeder Full/Empty Signalling
A paddle or flag interrupting the slot reports hopper state to the line controller.
Harness-Built OEM Equipment
Pre-terminated harnesses plug straight onto the sensors at final assembly — no per-sensor wiring station needed.
Frequently Asked Questions
What is the practical benefit of the plug-in connector body?
Replacement without rewiring. The harness stays fixed to the machine; the sensor body unplugs and a spare plugs in — a line operator can do it during a short stop, without opening the control cabinet or calling an electrician.
What do the suffixes N, P, NA and R mean?
They combine output transistor and indicator logic: N = NPN with the indicator lit when light is received; P = PNP, indicator on light received; NA = NPN with the indicator lit when the beam is blocked; R = PNP, indicator on beam blocked. Pick NPN/PNP to match your controller input and the indicator behaviour your technicians prefer at commissioning.
Can one part number cover both Light-ON and Dark-ON logic?
Yes — that is the point of the (L) terminal on the connector. Leave (L) open for Dark-ON operation (output energises when the beam is blocked), or short (L) to V+ for Light-ON (output energises when the beam is received). Maintenance can stock one spare per output type and cover both logics.
Which housing style should I choose?
DD-670 is the standard body; DD-671 (L-type) and DD-672 (T-type) re-orient the slot and mounting for different bracket geometries; DD-673 and DD-674 are close-mounting styles for placing several sensors side by side at narrow pitch. All five share the 5 mm slot and the same output matrix.
What flag dimensions suit the slot?
The detection slot is 5 mm with a 7 mm slot width, using an infrared emitter/receiver pair facing each other. Confirm your interrupter flag passes freely inside 5 mm; for thicker or fluttering flags step up to the 13 mm DD-303N/DD-403N.
Where are the response time, supply voltage and IP rating?
The published catalogue data for this series covers detection method, slot size, light source and the output/logic matrix. Response frequency, supply range, current and IP rating are not published — ask the factory to confirm these figures against your application before design-in. We would rather say 'contact us' than print a guess.
Is the DD-670 a safety sensor?
No. It is a general-purpose position/presence sensor, not an IEC 61496-certified safety component, and must not be used alone for personnel protection.
Can you quote mixed housings and outputs in one order?
Yes — the 20-model matrix is stocked as one family, so mixed part numbers can ship together. Contact the factory with the split; samples, OEM marking and certification documents are available on request.