About the CDD-40N The specification of M18 NPN NO+NC 4wire
The CDD-40N The specification of M18 NPN NO+NC 4wire is part of the ELEHPD Photo Sensor range. Model: CDD-40N Mounting: Diffused type Sensing distance: 40cm Supply voltage:10-30vdc Output: NPN Repeated accuracy: <3% Frequency 1000Hz Ambient temperature -25~+70C Protection degree IP67 Shell material: metal Connection 2m PVC black Cable ELEHPD manufactures and exports low voltage electrical products from Yueqing, Zhejiang, China, supplying distributors, panel builders, M&E contractors and OEM buyers worldwide.
Full catalogue description: The specification of M18 NPN NO+NC 4wire photoelectric sensor CDD-40N
Typical applications
- Motor control centres and pump or fan starters
- Machine building, conveyors, packaging and CNC equipment
- HVAC control panels and building automation
- Water treatment, irrigation and pumping stations
- Panel retrofits replacing electromechanical control gear
How to specify the right Photo Sensor
- Size the contact rating for the inductive load, not just the resistive current (AC-3 duty for motors)
- Check the coil voltage and frequency available in the panel: 24 V DC, 110 V, 230 V or 400 V AC
- Confirm the auxiliary contact count needed for the control and indication circuit
- Match the enclosure rating to the environment (IP20 inside a panel, IP65 on the machine)
Specifications
The specification of M18 NPN NO+NC 4wire photoelectric sensor CDD-40N
Model : CDD-40N
Mounting : Diffused type
Sensing distance : 40cm
Supply voltage :10-30vdc
Output: NPN
Repeated accuracy : <3%
Frequency 1000Hz
Ambient temperature -25~+70C
Protection degree IP67
Shell material : metal
Connection 2m PVC black Cable
| Dimension | M18 |
| Detection mode | |
| Detection distance | 10-30cm |
| Detection range adjustment | potentiometer adjustment |
| Dimensional drawing | |
| Model | DC
type | NPN | NO | |
| NC | |
| NO+NC | CDD-40N |
| PNP | NO | |
| NC | |
| NO+NC | CDD-40P |
AC
type | Two-wire | NO | |
| NC | |
| Three-wire | NO | |
| NC | |
Frequently asked questions about the CDD-40N The specification of M18 NPN NO+NC 4wire
What is the difference between a contactor and a relay?
A contactor is built for switching power circuits repeatedly at high current, often with motor duty ratings (AC-3) and arc-suppressing chambers. A relay switches control signals at low current. In practice: contactor for the motor, relay in the control circuit that drives the contactor coil.
How do I calculate the correct contactor size for a motor?
Use the motor's full-load current, apply the AC-3 rating for the operating voltage, and allow for the number of starts per hour. As a rule of thumb, the contactor's AC-3 rating should be at least equal to the motor FLC, then step up one frame if the duty is heavy.
Do you supply the coil voltage I need?
Coil voltages are specified per order. Send the model number, coil voltage and frequency you require and we will confirm availability and lead time.
Are auxiliary contacts included?
Base models come with the standard auxiliary contact configuration for that frame. Add-on auxiliary blocks and mechanical interlocks can be quoted with the contactor.
Further reading
