Question 1: What is the function of the two knobs on the E3Z-D61?

One is the motion selection switch, which switches between the blackout ON and the incoming light ON, and the other switch is a sensitivity adjustment knob for adjusting the detection distance.

Question 2: Does the E3Z-R61 come with a retroreflective sheeting?

A series of retro-reflective sensors and reflectors are available separately. The reflector type can be selected according to the customer’s detection distance.

E3Z photoelectric sensor

Note: Set the distance between the sensor and the reflector to be greater than ().

Question 3: How to connect the E3Z-T61 output to the OMRON PLC?


Brown – power + pole



Brown – power + pole – PLC COM end


Black–PLC input point


Question 4: What is the E3Z series naming convention?


1 T-optical type; R-retroreflective type; D-diffuse reflection type

2 6-NPN output; 8-PNP output

3 1-wire lead-out; 2-wire lead-out; 6-connector type; 7-connector type

4 K-shell material has improved oil resistance on E3Z-□□□, can be used in harsh environments. H-only diffuse reflection type sensitivity adjustment knob, no sensitivity to radiation type and retroreflective type Adjusting the knob, L-ON/D-ON of E3Z-□□□H is switched by wiring, which is an economical product of E3Z-□□□

5 G0- has a light stop function; M3J- is an oil resistant type connector relay type

Question 5: How does the signal output from the E3Z-D61NPN translate into the PNP signal input PLC?

The logic of the pull-up resistor output logic and the NPN output between the brown and the signal is reversed, that is, the PLC input is OFF when the transistor is turned on, and the PLC input is ON when there is no conduction.

The value of the pull-up resistor is determined by the minimum ON voltage of the PLC and the internal resistance of the PLC input point.


Minimum ON voltage of PLC = power supply voltage of encoder * {PLC input point internal resistance / (PLC input point internal resistance + pull-up resistance)}

Question 6: What are the functions of BGS and FGS in the distance-set E3Z-LS series?

The distance-set photoelectric sensor is less affected by the surface state and color of the measured object, and is more suitable for detecting the position of the object than the ordinary diffuse reflection type photoelectric sensor.

The distance setting type can be set to the background suppression function (BGS) or the foreground suppression function (FGS).

BGS: Background objects that are farther than the set distance are not detected;

FGS: Objects that are closer than the set distance will not be detected.

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