ON / OFF Input Sensor Controller NPS (Discontinued Products)

Specifications

Notes:

1)Where measurement conditions have not been specified precisely, the conditions used were an ambient temperature of +20 ℃ +68 ℉.

2)In NPS-C7W, two output indicators, Sensor 1 output indicator and Sensor 2 output indicator, have been incorporated.

Dimensions

• Unit: mm in

NPS-□

Note:1) The above drawing illustrates the dimensions of NPS-CT7.The dimensions of NPS-C7 and NPS-C7W are identical to those given above.2) The front panel of each model is different.Refer to "Cautions For Use" for more details of the front panels.

Assembly dimensions with attached protection cover

I/O Circuit and Wiring diagrams

NPS-C7
NPS-CT7

I/O circuit diagram

Terminal arrangement diagram

Note:Response time of the NPN open-collector transistor output of NPS-C7 and NPS-CT7 is 5 μs. If a relay or a micro-switch (mechanical contact) is connected, its bounce may result in output chattering. Take care of this aspect, especially when the timer function is used.

NPS-C7W

I/O circuit diagram

Terminal arrangement diagram

Functional description

Block diagrams (The diagrams below explain NPS’s operation in a simple manner. The actual circuits may differ slightly.)

NPS-C7

NPS-C7W

NPS-CT7

Timer functions (NPS-CT7 only)

• NPS-CT7has three types of convenient built-in timer functions.
• ON-delay (OND)
  <Function>Neglects short output signals.
  <Application>As only long signals are extracted, this function is useful for detecting if a line is choked or for sensing only objects taking a long time to travel.

• OFF-delay (OFD)
  <Function>Extends the output signal for a fixed period of time
  <Application>This function is useful if the output signal is so short that the connected device cannot respond.

• ONE SHOT (OSD)
  <Function>Outputs a fixed width signal upon sensing.
  <Application>This function is useful when the input specifications of the connected device require a signal of fixed width. Of course, it is also useful for extending a short width signal to a desired width.

Various other applications are possible.

Selection switch and timer operation

Timer period: T =Switchable, either 40 ms approx. to 1 sec. approx., or 0.4 sec. approx. to 10 sec. approx.

External synchronization function (NPS-C7, NPS-CT7 only)

The output is disabled when the external synchronization input is Low [mode selection switch on NORM. (Note)] or is High [mode selection switch on INV. (Note)].

• Gate trigger

Note:

SinceNPS-C7 is not incorporated with the selection switch, the output is disabled only when the external synchronization input is Low.

The sensor signal is judged at the instant the external synchronization input rises up or falls down. This sensor is ideal for cap presence detection that would have required two controllers in the past.

Example: Detecting presence of cap on bottle

• Edge trigger (NPS-CT7 only)

Note:

As the output time‘t’is only 5 μs approx., extend it by using the OFFdelay timer or the ONE SHOT timer.

Mounting

• To mount NPS with screws, use M4 screws.
  The tightening torque should be 0.78 N•m or less.

Wiring

• Make sure that the power supply is off while wiring.
• Verify that the supply voltage variation is within the rating.

• Short-circuit protection plate

The short-circuit protection plate is attached to terminal No. 1 to prevent AC short-circuit. Flip the plate up, connect the wire to terminal No. 1, and then flip it down.

(The short-circuit protection plate is attached at the time of shipment from our factory.)

The short bar saves wiring when a common power supply is used for the AC supply terminal and the load supply of the relay contact output.

(The short bar is attached between the terminal Nos. 1 and 2 at the time of shipment from our factory. To use a separate power supply for the output relay, make sure to remove it.)

Typical wiring diagram

• Short bar

• Dimensions of suitable crimp terminals

(Unit: mm in)

Note:

Use crimp terminals having insulation sleeves.
Recommended crimp terminal: Nominal size 1.25-3.0

• NPS-C7andNPS-CT7do not incorporate a short-circuit protection at the NPN open-collector transistor output.
  Do not connect them directly to a power supply or a capacitive load.
• The response time of the NPN open-collector transistor output of NPS-CT7 or NPS-CT7 is 5 μs. If a relay or a micro-switch (mechanical contact) is connected, take care since its bounce may result in output chattering.
• Do not run the wires together with high-voltage lines or power lines or put them in the same raceway. This can cause malfunction due to induction.

Others

• Do not use during the initial transient time (0.5 sec.) after the power supply is switched on.
• Avoid dust, dirt, and steam.
• Take care that the controller does not come in direct contact with water, oil, grease, or organic solvents, such as, thinner, etc.