EUCHNER CES-A-AEA-04B Non-Contact Safety Evaluation Unit
The EUCHNER CES-A-AEA-04B (order no. 072000) is a unicode evaluation unit for the CES-A non-contact safety switch system, supporting up to 4 read heads. It forms part of an interlocking device that prevents dangerous machine functions from occurring while a guard is open, meeting Category 4 / PL e according to EN ISO 13849-1.
Technical Specifications
Safety Function
- Number of read heads supported: max. 4
- Coding: unicode (each actuator uniquely coded; taught-in via jumper; only the last taught-in actuator is detected)
- Safety category: Category 4 / PL e (EN ISO 13849-1)
- Diagnostic coverage: 99%
- PFHD: 1.3 × 10⁻⁸ (at max. 0.1 A) / 1.5 × 10⁻⁸ (at max. 3 A)
- Mission time: 20 years
- Discrepancy time between relay operating points (4 active actuators): max. 400 ms
Electrical
- Operating voltage: 21–24–27 V DC regulated, residual ripple <5%
- Current consumption (relay energized): 150 mA
- Safety contacts: 2 relay contacts (13/14, 23/24), floating, internally monitored
- Monitoring outputs (DIA, O1–O4): semiconductor, p-switching, short-circuit-proof, max. 20 mA
- External fuse (safety circuit): 6 AgG or 6 A circuit breaker (characteristic B or C)
- Rated insulation voltage: Ui 250 V; rated impulse withstand voltage: Uimp 4 kV
- Mechanical life: 10 × 10⁶ operating cycles (relay)
Response and Timing
- Ready delay after power-on: 10–12 s
- Response time after actuator removal (4 active actuators): max. 450 ms
- Start button response delay: 200–300 ms
- Max. switching frequency: 0.25 Hz
- Min. dwell time (actuator outside actuating range): 3 s
Mechanical and Environmental
- Housing material: Plastic PA6.6
- Connection type: screw terminals (0.25–2.5 mm²)
- Mounting: TH 35 mounting rail (EN IEC 60715)
- Degree of protection: IP20
- Degree of contamination: 2
- Ambient temperature (at UB = 24V DC): -20°C to +55°C
- Atmospheric humidity: max. 80% rH, non-condensing
- Gross weight: 0.34 kg
Applications
Used as the central evaluation unit for EUCHNER’s CES-A non-contact coded safety switch system on movable machine guards — interlocking up to 4 guard doors/covers with high-integrity (Category 4/PL e) safety monitoring, suitable for applications requiring UL-approved safety circuits (operation requires a UL Class 2 power supply or equivalent).
Compatible Read Heads
- CES-A-LNA-05V / -10V / -15V / -25V (PVC cable, various lengths)
- CES-A-LNA-05P / -10P / -15P (PUR cable, various lengths)
- CES-A-LNA-SC (M8 plug connector)
- CES-A-LCA-10V
- CES-A-LQA-SC
- CES-A-LMN-SC
Related Products
- EUCHNER CES-A-UEA-04B (equivalent evaluation unit, multicode)
- EUCHNER CES-AZ-UES-04B (evaluation unit with guard locking support)
- EUCHNER CES-A-LNA-10V-071846 (compatible read head, 10m PVC cable)
Need this part or a compatible read head? Contact our sales team for stock confirmation and a fast quote.
