B7AH-R6D58 datasheet(103/121 Pages) OMRON

103 / 121 page

B7A

101

Peripheral Circuits of Modular Model

Input Interface Circuit

The modular model has a minimum ON discrimination voltage of 2.2

V and a maximum OFF discrimination voltage of 0.8 V, which are

suitable for TTL circuits. If sensors are used for input, the following

input circuits are required.

Two-wire DC Sensor Input

If a two-wire DC sensor is used for input, current limit resistor R1 and

leakage current diverter R2 are required as shown in the diagram

below. The following table lists R1 and R2 values for the E2E-XD-N

Two-wire DC Proximity Sensor (with a current leakage of 0.8 mA

maximum, a residual voltage of 3 V maximum, and a minimum con-

trol output current of 3 mA).

Input Interface (E2E-XD-N)

Supply voltage

12 V

24 V

1,800

Ω

5,600

Ω

820

Ω

820

Ω

–

Two-wire DC

proximity sensor

Interior of B7A

Input with B7A and Common Power Supply

(12 to 24 VDC) (10-point Modular Model only)

The 10-point modular model has an input voltage range of 0 to 5

VDC. If a common power supply is connected, current limit resistor

R3 is required as shown in the diagram below. Use the following for-

mula to calculate the value of R3.

R3 =

– 2,200 (

Ω)

Supply voltage VS (V) – 1.4 (V)

Input current (2 x 10–3 (A))

Note:

The 16-point module’s input voltage range is 0 V to the

power supply voltage. Therefore no current limit resis-

tor is required.

–

Vs (12 to 24 VDC)

2.2 k

Ω

Interior of B7A

Noise Protection Circuits

If there is a possibility of noise interference from the power supply, input, and/or output lines, add the following noise protection circuits.

Power supply noise protection circuit

Input noise protection circuit

Output noise protection circuit

12 to

24 VDC

–

B7A

R: 10 to 20

Ω (1/8 W min.)

C: 33

µF min with a dielectric strength of 50 V min

–

B7A

V1N

Input device

Photocoupler

C: 0.1

µF min.

R: Photocoupler input current limit resistor

Load

OUT

B7A

–

Photocoupler

R: Photocoupler input current limit resistor

ZD: VZD = 36 V (with a power consumption

of 1 W min.)

C: 33

µF min. with a dielectric strength of 50 V min.

B7A

–

Input device

ZD: VZD = 36 V

(with a power consumption of 1 W min.)

OUT

B7A

–

ZD: VZD = 36 V

(with a power consumption

of 1 W min.)

Load

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