■Main points of difference from previous model

■For your safety
In using the light curtain, please establish a control system to satisfy the below items in order to ensure safety with a total system.

>>Precautions for use

Improved environmental resistance performance and easier operability [New structure]

A seamless structure with least seam area possible is newly developed. The inner unit is protected by a cylindrical inner case.
Seams such as unit and lens surfaces have been greatly reduced, so that particles such as oil mists and dust are prevented from getting in, rising its environmental resistance performance.

Equipped with a digital error indicator

The system constantly checks the light curtain for problems such as incorrect cable wiring, disconnection, short-circuits, internal circuit problems, and incoming light problems. Details of any electrical problems such as at equipment startup will appear on the digital display. The inconvenience of the previous method of counting the number of LED blinks is no longer needed.

It is possible to select from among three types according to the worksite

A wide range of variations are available with protective heights of 230 to 1,910 mm 9.055 to 75.197 in (1,270 mm 50.000 in for the finger protection type). Mixing three types in a series connection is also possible.

A unified response time of 14 ms for all models makes setup easy

A fast response time of 14 ms has been achieved regardless of the number of beam channels, the beam axis pitches and the number of units connected in series. This reduces calculation work required for the safety distance.

Supports both PNP and NPN polarities in a single model

The SF4B series combines PNP transistor output and NPN transistor output in a single model. Overseas equipment that uses PNP, replacement with NPN sensors, factories that are positively grounded, and transfer of equipment overseas are all situations where the control circuits for a single model are suitable for use worldwide.

■Polarity can be changed easily by changing wiring
When the output polarity setting wire (shielded) is connected to 0 V, PNP output is selected, and when it is connected to 24 V, it switches to NPN output.

A muting control function is provided to increase both safety and productivity

The light curtain is equipped with a muting control function that causes the line to stop only when a person passes through the light curtain, and does not stop the line when an object passes through. The muting sensors and muting lamps can be connected directly to the light curtain so that a exclusive controller is not required for muting. This both reduces costs and increases safety and productivity.

Override function allows the line to be restarted smoothly after it has stopped while muting control was active

In case the power turns off while the light curtain has been interrupted by an object or in case the line stops before the muting conditions have been established (if only one muting sensor has been interrupted), the line can be restarted smoothly without having to remove the object that is interrupting the light curtain.

Equipped with a safety circuit that does not require an exclusive safety relay unit

The light curtain has a built-in external device monitoring function (such as for fused relay monitoring) and an interlock function. The safety circuit is constructed so that a separate safety relay unit is not needed, and the control board has become smaller to help to contribute to lower costs.

Beam-axis alignment indicators show the incident light position at a glance

Beam-axis alignment indicators display the beam channels of the light curtain in four blocks. When the beam channel at the bottommost channel (or topmost channel), which is used as a reference for beam-axis alignments, is correctly aligned, the LED blinks red. After this, each block lights red as the beam axes successively become aligned. When all channel beam axes are aligned, all LEDs light green. The display also has a stability indicator (STB) added so that setup can be carried out with greater stability.

Easy to distinguish receiver and emitter

Emitter is in gray; receiver is in black. Whether during startup or maintenance, troubles due to incorrect wiring or false recognition can be greatly reduced. Moreover, model No. can be confirmed from the front face of the light curtain.

Mutual interference is reduced without needing for interference prevention lines

The light curtain is equipped with the ELCA (Extraneous Light Check & Avoid) function. Because it automatically shifts the scan timing of the light curtain in order to avoid interference, it is not necessary to wire interference prevention lines between machineries.

Reducing the number of malfunctions caused by extraneous light

Double scanning method and retry processing are two new functions exclusive to SUNX, which are effective in eliminating the effects of momentary extraneous light from peripheral equipment. The reduction in operating errors caused by extraneous light reduces frequent stopping of machinery.

Handy-controller SFB-HC that enables the user to select a variety of settings [SFB-HC] (Optional)

■Separate muting control function for each beam channel
The handy-controller SFB-HC* (optional) can be used to carry out muting control for specified beam channels only. Because individual beam channel can be specified to suit the object, separate guards to prevent entry do not need to be set up.

■Any valid beam channels can be selected The SF4B series incorporates a fixed blanking function.
The SF4B series is equipped with a fixed blanking function which allows specific beam channels to be selectively interrupted without causing the control output (OSSD) to output the OFF signal. This function is convenient for use with applications in which certain fixed obstacles tend to block specific beam channels.
Furthermore, this function provides greater safety as the control output (OSSD) will automatically output the OFF signal if the fixed obstacles are subsequently removed from the sensing area.

■Non-specified beam channels can be deactivated The SF4B series incorporates a floating blanking function.
1, 2 or 3 non-specified beam channels can be deactivated. If the number of beam channels that are blocked is less than or equal to the set number of beam channels, then the control output (OSSD) will not output the OFF signal. This function is useful in the event when the positions of obstacles within the sensing area must be changed during object rearrangement, or when an object passes through the light curtain’s sensing area.

Note:
When the floating blanking function is used, the size of the min. sensing object is changed.

■Auxiliary output has selectable output configuration

■A variety of other functions can be selected

・Emission intensity control function
This function reduces the amount of emitting light. The two modes, normal mode and short mode, can be selected. The factory setting is set to the normal mode for the emission intensity control function.

・Setting monitoring function
This function allows the user to confirm the details of each light curtain setting.

・Protection function
Unless the password is not input, any setting change of the light curtain cannot be allowed. The factory setting is set to invalid for the protect function.

・Copy function
Allows settings details to be copied into other light curtains. In the event that the same setting must be input into several different light curtains, this function will reduce the time required for the input of settings.

・Muting lamp diagnosis setting
When the muting lamp diagnosis is disabled, the muting function will continue to operate even if the lamp is blown.