CET-AR

Your advantages

Safety switch with guard locking and safe guard lock monitoring
Integrated CES-AR electronics

A special evaluation unit is not required
Possible to connect up to 20 devices (CES-AR, CET-AR, MGB-AR,…) in series in an AR chain

Safety category 4 and PL e according to EN ISO 13849-1 in case of horizontal mounting, or head downward
Two safe semiconductor outputs and monitoring output OUT
Safety outputs with pulsing
Input (optional) for the connection of feedback loop and start button

Design and functionality

In the CET-AR-… the advantages of the CET-AR-… are combined with the guard locking function of the CET-AX-… The CET-AR-… forms a complete safety solution (PL e according to EN ISO 13849-1). Depending on the version a start button and feedback loop can be connected. As a result the CET-AR-… includes everything that is necessary to secure a safety guard. It could not be easier!

more information

Connection to safe control systems or safety relays

Do not use a control system or safety relay with pulsing for monitoring short circuits or switch off the pulsing function in these devices. The switch generates its own clock signals on the output lines OA/OB. A downstream device must tolerate these test pulses, which may have a length of up to 1ms.

The inputs on the downstream device must be suitable for positive-switching devices (pnp outputs), as the two outputs on the safety switch deliver a level of +24 V in the switched-on state.

OUT output

The semiconductor output OUT is switched if the safety guard is closed (actuator in the operating distance). It is not allowed to be used for safety functions. The OUT outputs on the individual switches can, however, not be polled if connected in series using a Y-distributor. Evaluation is only possible on parallel wiring to the control cabinet.

RST input

The switches in a chain in a fault state can be reset using the RST input. To do this, a voltage of 24 V is applied to the RST input for at least 3 seconds. It is not necessary to disconnect the supply of power to reset a fault.

Usage as individual switch or switch chain

The safety switch CET-AR can be operated as a compact individual switch or in a switch chain with max. 20 devices.

If a single CET-AR is used, connect the switch as shown in figure above. The OUT output can also be connected here to a control system as a monitoring output.

The switches are connected in series using plug connectors and Y-distributors. The first switch in the chain must always be fitted with a bridging plug. If a safety guard is opened or if a fault occurs on one of the switches, the system shuts down the machine. A higher level control system can, however, not detect which safety guard is open or on which switch a fault has occurred. A special AR evaluation unit is required.

Non-contact safety switch CET-AR-..., M12, with double insertion slide

Read head with guard locking and integrated evaluation electronics
Locking force up to 6500 N
Up to 20 switches in series
Short circuit monitoring
2 safety outputs (semiconductor outputs)
Up to category 4 / PL e according to EN ISO 13849-1
With double insertion slide
With 2 plug connectors M12

Approach direction

Horizontal

Can be adjusted in 90° steps

Safety switches

The safety switch CET is only allowed to be operated in conjunction with the actuator CET-A-BWK-50X.

Important:The actuator must be ordered separately.

Unicode evaluation

Each actuator is unique. The evaluation unit detects only the actuator that has been taught-in. Additional actuators can be taught-in. Only the last actuator taught-in is detected. New actuators are taught by connecting the teach-in input to U_B (only version with teach-in input).

Multicode evaluation unit

Every suitable actuator is detected by the evaluation unit.

Solenoid operating voltage

DC 24 V +10% -15%

Guard locking types

CET1	Guard locking by spring force, release by applying voltage to the guard locking solenoid.

LED function display

State LED	Status LED
DIA LED	Diagnostics LED
LED 1 red	freely configurable
LED 2 green	freely configurable

Additional connections

OUT	Monitoring output (semiconductor)
RST	Reset input

Category according to EN ISO 13849-1

Due to two redundant design semiconductor outputs (safety outputs) with internal monitoring suitable for:

Category 4 / PL e according to EN ISO 13849-1

Important:To achieve the stated category in accordance with EN ISO 13849-1, both safety outputs (OA and OB) must be evaluated.

The category is dependent on the installation position of the safety switch:

Plug connector (view of connection side)	PIN	Designation		Function	Wire color connection cable
2 x M12	S 1.1	IB		Enable input for channel 2	WH
	S 1.2	U_B		Operating voltage AR electronics, 24 V DC	BN
	S 1.3	OA		Safety output, channel 1	GN
	S 1.4	OB		Safety output, channel 2	YE
	S 1.5	OUT		Door monitoring output	GY
	S 1.6	IA		Enable input for channel 1	PK
	S 1.7	0 V U_B		Operating voltage AR electronics 0 V	BU
	S 1.8	RST		Reset input	RD

	S 2.1	O V U_CM		Operating voltage, locking element O V	BN
Depending on version	S 2.2		LED 1	LED 1 red, freely configurable 2), 24 V DC	WH
	S 2.2	OUT D		Door monitoring output (only CET3-AR and CET4-AR)	WH
	S 2.3	LED 1	LED 2	LED 1 red or LED 2 green, freely configurable 2), 24 V DC	BU
	S 2.4	U_CM		Operating voltage guard locking solenoid, 24 V DC	BK
	S 2.5	J		Version with teach-in input: To teach-in a new actuator, connect to 24 V DC; in normal operation connect to 0 V.	GY
		Y		Version with feedback loop: if the feedback loop is not used, connect to 24 V DC
		-		Version without feedback loop and without teach-in input: This connection must be connected to 0 V.

Order numbers:

Unicode

106 275 CET1-AR-CDA-AH-50X-SG-106275

Multicode

109 231 CET1-AR-CDA-CH-50X-SG-109231

Non-contact safety switch CET-AR...

with 2 plug connectors M12

Dimension drawing

Wiring diagrams

Connection example for separate operation, version with teach-in input

Connection example for separate operation, version without feedback loop and without teach-in input

Non-contact safety switch CET-AR-..., M12, with escape release

Read head with guard locking and integrated evaluation electronics
Locking force up to 6500 N
Up to 20 switches in series
Short circuit monitoring
2 safety outputs (semiconductor outputs)
Up to category 4 / PL e according to EN ISO 13849-1
With escape release
With 2 plug connectors M12

Escape release

Is used for the manual release of the guard locking from within the danger area without tools.