SMC Networks D-H7A1 specifications Safety Instructions, Product specification, Installation

017A/ENGD-#S-TFI95GB

Installation and Maintenance Manual

Solid State Auto-Switch Series D-H7A1, D-H7A2,

D-H7BA, D-H7B, D-H7BW, D-H7NW, D-H7PW

For future reference, please keep this manual in a safe place

This manual should be read in conjunction with the current product catalogue

Problem

3 wire type NPN output

3 wire type PNP output

DC(+)

DC(+)

Brown (Red)

Brown (Red)

OUT

OUT

Switch

Load

Switch

Load

Power

Black (White)

Power

Black (White)

source

source

DC(-)

DC(-)

Safety Instructions

These safety instructions are intended to prevent a hazardous situa- tion and/or equipment damage. These instructions indicate the level of potential hazard by label of “Caution”, “Warning” or “Danger”. To ensure safety, be sure to observe ISO4414 (Note1), JIS B 8370 (Note2) and other safety practices.

Note 1: ISO 4414: Pneumatic fluid power – Recommendations for the application of equipment to transmission and control systems.

Note 2: JIS B 8370: Pneumatic system axiom.

CAUTION : Operator error could result in injury or equipment damage.

WARNING : Operator error could result in serious

2. Only trained personnel should operate pneumatically

operated machinery and equipment.

Compressed air can be dangerous if an operator is unfamiliar

with it. Assembly, handling or repair of pneumatic systems should

be performed by trained and experienced operators.

3. Do not service machinery/equipment or attempt to

remove component until safety is confirmed.

1) Inspection and maintenance of machinery/equipment should

only be performed after confirmation of safe locked-out

control positions.

2) When equipment is to be removed, confirm the safety process

as mentioned above. Switch off air and electrical supplies and

exhaust all residual compressed air in the system.

3) Before machinery/equipment is re-started, ensure all safety

measures to prevent sudden movement of cylinders etc.

	Condition				Stay ON
				(sometimes OFF)
									Indicator	Stay ON
	Stay OFF
								lamp lights
(sometimes ON)
						Stay	OFF
									Normal
	Indicator	Stay OFF
	lamp lights
	Normal
			Source voltage						2 wires/
			or load voltage						3 wires

				Blue (Black)				Blue (Black)
2 wire type (Sink output)						2 wire type (Source output)
				OUT(+)				OUT(+)
					Load				Power
								Brown (Red)
			Brown (Red)						source
							Switch
	Switch				Power			OUT(-)
				OUT(-)	source				Load
		Blue (Black)						Blue (Black)

Fig 4

injury or loss of life.

DANGER : In extreme conditions, there is a possible result of serious injury or loss of life.

WARNING

1.The compatibility of pneumatic equipment is the respon- sibility of the person who designs the pneumatic system or decides its specifications.

Since the products specified here are used in various operating conditions, their compatibility for the specific pneumatic system must be based on specifications or after analysis and/or tests to meet your specific requirements.

1.Product specification

	(Bleed air into the system gradually to create back-pressure,
	i.e. incorporate a soft-start valve).
4. Contact SMC if the product is to be used in any of the
following conditions:
1)	Conditions and environments beyond the given specifica-
	tions, or if product is used outdoors.
2)	Installations in conjunction with atomic energy, railway, air
	navigation, vehicles, medical equipment, food and beverage,
	recreation equipment, emergency stop circuits, press
	applications, or safety equipment.
3)	An application which has the possibility of having negative
	effects on people, property, or animals, requiring special
	safety analysis.

CAUTION

Ensure that the air supply system is filtered to 5 micron.

Normal

Abnormal

3 wires

2 wires

2 wires/

2 wires

3 wires

3

wires

Load

spec.

Replace the

Load spec.

check 1

switch

check 2

Normal

Abnormal

Normal

Abnormal

Normal

Abnormal

Wiring

(output) check

Normal

Abnormal

B

A

B

A

C

D

E

B

A

A

F

D

Load spec. check 1 . . .ON voltage > Load voltage - Internal voltage drop

Exterior dimensions

D-H7A1/H7A2/H7B

Indicator lamp

8	5
	.
	6
		9
		29	4. 6
	4. 3	ø3. 5	4
			.
			ø3
5
.	8
11
		10. 5 Most sensitive position

Appropriate tightening torque

Autoswitch

Autoswitch set screw

M3X0. 5x14l

Autoswitch mounting band

(with bracket)

Fig 5

M3 mounting screw correct tightening torque is 0.8~1.0 Nm (8.2~10.2 kgf.cm)S

Setting the switch detection position

Model number	D-H7A1	D-H7NW	D-H7A2	D-H7PW	D-H7B	D-H7BW
						D-H7BA
Wiring style		Three wire type			Two wire type
Output style	NPN type		PNP type			––
Application		IC, Relay, PLC			24V DC Relay, PLC
Source voltage		DC5·12·24V (DC4.5~28V)				––

Load spec. check 2 . . .OFF current > Leak current
A	. . .Switch output parts failure (replace)	D	. . . .Switch failure
B	. . .Correct wiring	E	. . . .Replace cylinder. Detectable magnet field inadequate (No magnet)
C	. . .Replace switch 2 wires R 3 wires	F	. . . .Replace PLC input board or replace switch 2 wire R3 wires

D-H7BW/H7NW/H7PW/H7BA

Indicator lamp

Position the actuator at its stroke end.

Single colour display

Move the auto-switch into the centre of the operating range and ensure that the red LED is ON.

Two colour display

Current consumption		10mA or less					––
Load voltage	DC28V or less			––		DC24V (DC10~28V)
Load current	40mA or less		80mA or less			5~40mA or less
Internal voltage drop	1.5V or less		0.8V or less			4V or less
Leak current		100µA or	less at DC24V			0.8mA or less at DC24V
Operating time			1ms or less
Operating	One colour	Two colour	One colour		Two colour	One colour		Two colour
indicator lamp*
Proof impact			1000m/s2
Insulation resistance			50M Ω or more at DC500V mega
Proof voltage		AC1000V for 1 minute (lead wire, between cases)
Ambient temperature			-10~60°C
Protection structure			IEC529 standard IP67, JISC0920

*One colour: Red diode lights when ON

Two colour: Operating position······Red diode lights Optimum operating position······Green diode lights

Installation	lowing conditions before operation, and note that the internal voltage
Actuators	drop and leak current have a considerable influence on the serial and
	parallel connection of the 2-wire solid state switch.

Fig 1

not start.

Ensure that, if using a load that can generate a surge voltage ie. Relay or Solenoid valve, a built-in surge protection circuit is installed.

If an auto-switch is to be used to generate an inter-lock signal, which requires high reliability, then instigate mechanical protection, or place another switch, double inter-lock style, together. Ensure the correct operation of this Inter-lock frequently.

Ensure, when installing this product, that enough space is available for maintenance to be carried out.

CAUTION

Do not subject this product to any form of impact damage.

Do not lift an actuator, fitted with an auto-switch, by the switch lead, as stress may be applied to the inside of the switch.

Ensure auto-switch mounting screw is tightened to the correct torque (see Mounting of switch bracket).

Do not use this switch in conditions where temperatures are outside of the switch operating Spec.

Protect the switch from weld spatter and accumulation of iron dust etc.

Maintenance

To avoid incorrect operation periodic maintenance should be carried out.

•Check tightness of mounting screw regularly to prevent possible movement of the switch from its set position.

•Regularly check condition of the wiring. Repair insulation damage immediately or replace the switch.

•If a red LED is showing this indicates that the switch has moved from the set position. Re-adjust the switch until the green LED is showing (this is the optimum position).

CAUTION

If detection failure occurs i.e. LED remains ON follow the faultfinding

	5
8 .
	6
		9
		29	4. 6
	4. 3	ø3. 5	4
			.
			ø3
5
.
11	8

Fig 3

Move the Auto-switch into the centre of the operating range and ensure that the green LED is ON.

ON

OFF

Red Green Red

Operating range

Fig 6

Detecting actuator stroke end

Refer to dimensions A & B in the actuator catalogue.

WARNING

To eliminate the possibility of magnetic interference between switch- es, please ensure that, when two or more actuators are used, in parallel, they are kept at least 40mm apart.

Mid-stoke position sensing

Exercise caution when attempting to detect the piston at mid-position, without stopping, as the switch detection time may be too short, particularly at relatively high actuator speeds. Detectable max. piston speed can be obtained by the following formula:

V (mm/s) = Auto switch operating range (mm)

Load operating time (m/s)

Where possible keep all wiring as short as possible.

CAUTION

If the 2-wire type solid state auto-switch has a large internal voltage drop, and leakage current is also high, it is possible that the load may not operate correctly due to incorrect load spec. Please confirm the fol-

Leak current influence

I.E Voltage generated to the load when the power is turned off.

Voltage generated = Auto-switch leak current x load resistance. If this voltage exceeds the OFF voltage of the load, it is possible that the load may stay ON. In order to match the condition of the controller-input unit and leak current, then auto-switch leak current must be less than input unit OFF current.

Internal voltage drop

Should an internal voltage drop occur, then the load supply voltage will also drop as the switch operates. (Load supply voltage = Source voltage – Internal voltage drop).

When the load supply voltage becomes lower than the switch ON voltage, the load may not operate correctly.

WARNING

Incorrect load voltage

Although the switch will operate correctly, even if the load current is below the limit of the specification, the indicator light will be 'dimmed'. If the load current falls to 3mA, or lower, the operation may

Adjust the auto-switch so that the ON position coincides with the cen- tre of the operating area. If the switch is set to one side or the other of this centre position then inconsistent operation will occur.

Wiring

Do not apply repeated bending or tensile forces to the connecting wiring as this may cause disconnection. Bend radius is approximately R40mm or more.

Connect the load before applying power to the switch, failure to do so may cause excess current to damage the switch.

Ensure wiring is carried out correctly. Not all wiring modes have pro- tection and the switch may be damaged.

Separate signal lines from power/high voltage lines to prevent 'noise'. Ensure all wiring is correctly and fully insulated.

WARNING

DO NOT USE THIS SWITCH IN AN EXPLOSIVE ATMOSPHERE.

Do not use this switch in high magnetic fields, as this will damage the switch and actuator magnet.

Do not use this switch in water-laden atmospheres, oil or chemical laden atmospheres.

chart above (Fig 1).

For applications involving contact with water, elasticity, and welding, contact your nearest SMC Office. (See at the end of this Manual.)

If the hysteresis, between the ON and OFF position of the switch is incorrect please consult SMC.

Hysteresis

Piston moving
		ON position
direction
Piston moving			Hysteresis
direction
	OFF position

Fig 2

Basic wiring (Fig 4)

Lead wire colour in brackets indicates products complying with IEC.

Connection with PLC (sequence controller)

Depending on the PLC input specification, the output design of 3 wire type switches and 2 wire type switches differ. (See below)

PLC input specification	3 wire output type	2 wire connecting type
Sink input	NPN output	Sink output mode
Source input	PNP output	Source output mode

Mounting of switch bracket

Each actuator has a specified mounting bracket to mount the switch to the actuator. The type of bracket depends on the following:

•Type of actuator, and tube O.D. Please consult the current actuator catalogue for details.

When fitting an auto-switch for the first time please ensure that the actuator is fitted with a magnet and that the brackets are correct for the actuator type.

CAUTION

D-H7BA (Improved water resistant type)

Although this switch has improved properties with regard to oil and water resistance, it should not be exposed to cutting oil, which con- tains additives, high-pressure water jets or extremes of temperature.

CAUTION

In all cases do not clean with a solvent solution.

When you enquire about the product, please contact the following

SMC Corporation:
ENGLAND	Phone 01908-563888	TURKEY	Phone 212-2211512
ITALY	Phone 02-92711	GERMANY	Phone 6103-402-0
HOLLAND	Phone 020-5318888	FRANCE	Phone 01-64-76-10-00
SWITZERLAND Phone 052-34-0022		SWEDEN	Phone 08-603 07 00
SPAIN	Phone 945-184100	AUSTRIA	Phone 02262-62-280
	Phone 902-255255	IRELAND	Phone 01-4501822
GREECE	Phone 01-3426076	DENMARK	Phone 8738-0800
FINLAND	Phone 09-68 10 21	NORWAY	Phone 67-12 90 20
BELGIUM	Phone 03-3551464	POLAND	Phone 48-22-6131847