Approach direction
Horizontal
Can be adjusted in 90° steps
Safety switchThe device may be operated only in conjunction with the actuator CET-A-….
Important: The actuator must be ordered separately.
Multicode evaluation unitEvery suitable actuator is detected by the switch.
Solenoid operating voltage
- DC 24 V +10% -15%
Guard locking type
| CET4 | Open-circuit current principle guard locking by solenoid force. Activation of the guard locking by applying voltage to the guard locking solenoid. The door position is also monitored. The door monitoring output OUT D is set to HIGH as soon as the actuator is above the extended plunger (state: door closed, guard locking not active). The output OUT D remains set also with guard locking active. |
LED function display
| LED State | Status LED |
| LED DIA | Diagnostic LED |
| LED 1 rd | freely configurable |
| LED 2 gn | illuminates when door is closed |
Additional connections
| OUT | Monitoring output (semiconductor) |
| OUT D | Door monitoring output |
| RST | Reset input |
Category according to EN ISO 13849-1Due to two redundantly designed 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:
Dimension drawing
Block diagram
CET: Transponder-coded safety switch with guard locking
Dimension drawingBlock diagram
Technical dataApprovals
Mechanical values and environment
| Housing material | |
| Slide | Stainless steel |
| Safety switch housing | Die-cast aluminum |
| Weight | |
| Net | 1 kg |
| Ambient temperature | |
| At UB = 24V DC | -20 … 55 °C |
| Degree of protection | IP67 |
| Resilience to vibration | In acc. with EN IEC 60947-5-2 |
| Mechanical life | 1 x 106 |
| Installation orientation | Any |
| Degree of freedom | |
| Z | ±4 mm |
| Y | ±5 mm |
| X | ±5 mm |
| Ready delay | 10 s |
| Switching frequency | max.0,5 Hz |
| Connection | 2 plug connectors M12, 5 and 8-pin |
| Approach speed | 20 m/min |
| Guard locking principle | Open-circuit current principle |
| Locking force Fmax | 6500 N |
| Locking force FZh | 5000 N |
Electrical connection ratings
| Operating voltage DC | |
| UB | 24 V DC -15% … 15% Reverse polarity protected, regulated, residual ripple < 5%, PELV |
| LED | 24 V DC -15% … 10% |
| Current consumption | |
| ICM | 480 mA |
| IB | 80 mA |
| Utilization category according to EN 60947-5-2 | |
| DC-13 | 24V 200mA |
| Solenoid operating voltage DC | |
| UCM | 24 V DC -15% … +10% Reverse polarity protected, regulated, residual ripple < 5%, PELV |
| Fusing | |
| External (operating voltage UB) | 0,25 … 8 A |
| External (solenoid operating voltage UCM) | 0,5 … 8 A |
| Power consumption | |
| Solenoid | max.14 W |
| EMC protection requirements | In acc. with EN IEC 60947-5-3 |
| Solenoid duty cycle | 100 % |
| Degree of contamination (external, according to EN 60947-1) | 3 |
| Connecting cable | 30V DC, 2A |
| Safety class | |
| EN IEC 61140 | III |
| Switching load | |
| According to UL | 24V DC, class 2 |
| Safety outputs OA/OB | |
| Type of output | 2 semiconductor outputs, p-switching, short circuit-proof |
| Switching current | |
| Per safety output OA / OB | 1 … 200 mA |
| Output voltage | |
| High U(OA) / U(OB) | UB-1,5V … UB V DC |
| Low U(OA) / U(OB) | 0 … 1 V DC |
| Off-state current Ir | max.0,25 mA |
| Risk time according to EN 60947-5-3 | |
| Single device | max.400 ms |
| Delay per device | 5 ms |
| Switch-on time | 400 ms |
| Discrepancy time | |
| Both safety outputs | max.10 ms |
| Monitoring output OUT | |
| Type of output | p-switching, short circuit-proof |
| Switching current | |
| OUT | 1 … 50 mA |
| Output voltage | |
| OUT | 0,8xUB … UB V DC |
| Switching delay from state change | max.400 ms |
| Monitoring output OUT D | |
| Type of output | p-switching, short circuit-proof |
| Switching current | |
| OUT D | 1 … 50 mA |
| Output voltage | |
| OUT D | 0,8xUB … UB V DC |
| Switching delay from state change | max.700 ms |
Work area
| Repeat accuracy R | 10 % |
Other
| For the approval according to UL the following applies | Operation only with UL class 2 power supply, or equivalent measures see operating instructions |
Reliability values according to EN ISO 13849-1
| Monitoring of guard locking and the safety guard position | |
| Category | |
| Head upward | 3 |
| Head downward or horizontal | 4 |
| Performance Level | PL e |
| PFHD | |
| Head upward | 4.29 x 10-8 |
| Head downward or horizontal | 3.1 x 10-9 |
| Mission time | 20 y |
