EUCHNER CES-AZ-AES-02B Safety Relay

Order No.: 104775

It belongs to the CES-AZ series, a Transponder Non-Contact Safety Evaluation Unit (integrated safety relay). It adopts Unicode (single coding), which only recognizes the uniquely taught actuator. It supports up to 2 read heads.

Key Specifications

Max. number of read heads: 2 (CES-A-L… series read heads)

Safety level: Category 4 / PL e (EN ISO 13849-1)

Safety outputs: 2 relay safety outputs, each with 2 internally series-connected NO contacts for redundancy

Coding type: Unicode (single coding); only the last taught actuator will be identified.

Multi-code alternative: CES-AZ-UES-02B (Order No. 105140, Multicode)

Additional interfaces: Start button monitoring (falling edge detection), external contactor feedback loop, TST test input, DIA diagnostic output, O1/O2 semiconductor status outputs

Mounting: 35 mm DIN rail

Protection class: IP20 (only for cabinet installation)

Power supply: DC 24V (21~27V DC regulated power supply, ripple <5%)

Power consumption: Approx. 150 mA with relay energized

Terminals: Plug-in coded terminals, wire cross-section 0.25–2.5 mm²

Operating temperature: -20℃ ~ +55℃, no condensation, relative humidity ≤80%

Gross weight: 0.299 kg

HS Customs Code: 85364110

ECLASS: 27-27-24-03 Safety-related transponder switch

Terminal Definition

UB / 0V: DC24V power supply

J1, J2: Teach-in jumpers (to write actuator coding)

H11/H12, H21/H22: Signal for read head 1 & read head 2

SH1, SH2: Shield grounding for read heads

TST: Self-test input

S: Start button input (falling edge detection)

Y1/Y2: External feedback loop

13/14, 23/24: Two groups of safety relay outputs

DIA: Diagnostic output; O1/O2: Semiconductor status outputs for read heads

RESET pushbutton; LED indicators: Power, H1, H2, OUT safety status, DIA fault diagnosis

Series Comparison Table

Application Scenarios

Core Feature

One evaluation unit monitors 2 safety gates/protection points simultaneously. The Unicode exclusive coding prevents bypass and replacement, ideal for high tamper-proof requirements. It works with non-locking CES read heads and locking CEM/CET safety interlocks (EN 1088).

1. Machine Tool Industry (Most Common)
2. Machining centers, CNC milling machines & lathes: Dual front + side safety doors. Immediate safe stop once any door opens. Paired with CET locking read heads to keep doors locked until spindle coasts to rest.
3. Grinding machines, high-speed saws & punch presses: Two protective covers for high-speed rotating and reciprocating motions, meeting PL e safety requirements.
4. Laser cutting & plasma cutting machines: Upper and lower material loading doors; laser emission is only enabled when both doors are fully closed.
5. Automated Production Lines & Assembly Equipment
6. Robot workcells (fencing): Two access gates for the robot enclosure; robot stops immediately if a gate opens during operation.
7. Custom assembly machines, hydraulic presses & riveting machines: Front maintenance door + side material feed door with interlock logic.
8. Conveyors, transfer machines & rotary lifting stations: Service access gate + bypass protection gate.
9. Injection molding & die-casting machines: Mold safety door + barrel protective door with lock function to prevent opening during mold clamping and melt processing.
10. Packaging, Printing, Lithium Battery & 3C Equipment
11. High-speed packaging, laminating & slitting machines: Two rotary roller guard doors.
12. Li-ion winding machines, electrolyte filling machines & formation cabinets: Dual chamber doors to prevent high-voltage hazards and mechanical pinch injuries.
13. SMT placement machines, AOI testers & FPC equipment: Front and rear maintenance hatches.

Advantage: Non-contact design with no mechanical wear, long service life and resistance to dust and oil contamination.

4. Material Handling & Warehouse Equipment
5. Vertical elevators & lifts: Upper and lower level protective doors.
6. Sorting systems & cross-belt sorters: Two fence service doors.
7. Small AGV and tooling trolley cabin hatches.
8. Food & Pharmaceutical Machinery (Cleanroom Use)
9. Filling machines, bottle washers & sealing machines: Dual clean chamber doors.
10. Sterilization equipment: Chamber door + service door. Non-contact design avoids jamming and is easy to clean with no mechanical friction.

Note: Select stainless steel food-grade read heads for this application.

6. Test Benches & Laboratory Tooling
7. High-voltage test stands & aging cabinets: Two safety hatches; Unicode coding prevents personnel from shorting safety circuits to access hazardous areas.
8. Impact and durability test rigs: Dual protective enclosure doors.

Model Selection Guide (Critical)

CES-AZ-AES-02B (Unicode)

Only recognizes the last taught actuator. Anti-tampering priority. For machines with safety audits and strict anti-bypass requirements.

CES-AZ-UES-02B (Multicode)

Accepts any actuator of the same series. Only used for position monitoring; easier maintenance without re-teaching after actuator replacement.

02B = Max. 2 read heads; choose 04B for 4 safety gates.

Recommended Matching Read Heads

CES-A-LNN: Non-locking type, only for door position monitoring

CEM: Process lock for production process protection

CET: Personnel safety lock (door locked until machine stops coasting; EN 1088)

Unsuitable Applications

More than 2 independent safety doors (select 04B or safety PLC instead)

Multiple gates requiring separate logic and different stop sequences (use a safety controller)

Simple door monitoring without anti-bypass requirements (UES version offers better cost performance)

EUCHNER CES-AZ-AES-02B (Order No. 104775) Full Technical Data

Type: Unicode (single coding) non-contact transponder safety evaluation unit, max. 2 read heads

1. Order & Coding Information

Order No.: 104775

Coding type: Unicode (unique coding); only the last taught actuator will be recognized to prevent bypass replacement

Supported read heads: 2 units (CES-A-L… / CEM / CET series)

ECLASS: 27-27-24-03

HS Customs Code: 85364110

2. Safety Performance (EN ISO 13849-1 / EN IEC 62061)

Safety category: Category 4

Performance level: PL e

SIL rating: SIL 3

PFHd: 1.3×10⁻⁸

Mission time: 20 years

Safety architecture: Dual redundant relay safety outputs; each channel has 2 internally series-connected monitored NO contacts

3. Electrical Parameters
4. Supply voltage UB: DC 21~27V, rated DC24V (regulated power supply, ripple <5%), UL Class 2 power supply required
5. Power consumption: Approx. 150 mA with relay energized (excluding load of monitoring outputs)
6. Relay safety outputs (13/14, 23/24)

Rated insulation voltage: 250 V AC

Max. switching voltage: 250 V AC / 30 V DC

Continuous thermal current Ith: 8 A

AC-15: 6 A / 230 V AC; DC-13: 4 A / 24 V DC

4. External feedback loop Y1/Y2

Loop current: 5~8~10 mA

Max. allowed loop resistance: 600 Ω

5. Digital inputs (S Start, TST Test)

Low level: 0~2 V DC; High level: 15~27 V DC

6. Semiconductor monitoring outputs O1/O2, DIA

Type: NPN transistor output, NOT safety outputs

Max. load current: 100 mA

7. Terminals: Plug-in coded spring terminals, wire cross-section 0.25–2.5 mm²
8. Recommended external fuse: Max. 8A gG
9. Mechanical & Environmental Data

Overall dimensions: 114 × 99 × 45 mm

Housing material: PA6.6 engineering plastic

Weight: Approx. 0.25 kg

Mounting: 35 mm DIN rail (EN60715 TH35)

Protection class: IP20 (cabinet-only installation)

Pollution degree: 2

Operating ambient temperature: -20 ℃ ~ +55 ℃

Relative humidity: ≤80%, no condensation

Mounting position: Any orientation

5. Interfaces & Indicators

Terminals: UB/0V power, H11/H12 (read head 1), H21/H22 (read head 2), SH1/SH2 shield, S Start, TST Test, Y1/Y2 feedback, 13/14 & 23/24 safety outputs, O1/O2 read head status, DIA diagnosis

Operating elements: RESET pushbutton, J1/J2 teach-in jumpers

LED indicators: Power, H1, H2, OUT safety status, DIA fault diagnosis

6. Read Head Compatibility

Reliable operating distance Sar: Max. 26 mm (depends on read head model)

Compatible types: Non-locking door monitors CES-A-LNN / CES-A-LCA; process interlocks CEM; personnel safety interlocks CET (EN 1088)

7. EMC & Compliance Standards

EMC standard: EN IEC 60947-5-3

Applicable standards: EN ISO 13849-1, EN IEC 62061, EN 1088 (for guard lock applications)

8. Model Differentiation

CES-AZ-AES-02B: Unicode, anti-replacement, Cat.4 / PL e

CES-AZ-UES-02B (105140): Multicode, accepts any same-series actuator, easier maintenance

EUCHNER Safety Relay / Evaluation Unit Model & Order Number List

Two main product lines: ESM standalone safety relays (general-purpose) and CES-AZ transponder evaluation units (your target model), plus CES-AR series for serial connection.

Note: CES-AZ is a transponder decoding safety evaluation unit, generally referred to as a safety relay in the industry. All models meet Cat.4 / PL e (EN ISO 13849-1).

1. ESM Series General Safety Relays (E-Stop, safety gate, two-hand control, contact expansion)

1) ESM-BA Non-Time-Delay Basic Modules (Cat.4)

2) ESM-BT Time-Delay Modules (Cat.4, adjustable 1~30s; fixed-delay versions available)

3) ESM-2H Two-Hand Control Modules (EN574 / Type IIIC)

4) ESM-ES Contact Expansion Modules (Non-delay, used with BA/BT main units)

5) ESM-TE Time-Delay Expansion Modules

6) ESM Accessories

1. CES-AZ Series Transponder Evaluation Units (Unicode AES anti-tamper / Multicode UES general type)

AES = Unicode (only recognizes taught actuators, anti-bypass); UES = Multicode (accepts any same-series actuator, easy maintenance)

III. CES-AR Serial Link Evaluation Unit (Max. 12 AR read heads wired in series)

Quick Selection Guide

1. ESM-BA/BT: General safety relays for E-stop, regular safety gates and light curtains; no transponder decoding function.
2. CES-AZ-AES: Transponder-only type, anti-replacement & anti-cheating; for machine tools and automation with strict anti-bypass requirements.
3. CES-AZ-UES: Transponder-only type; no re-teaching needed after actuator replacement, preferred for mass-produced equipment.
4. CES-AR-AES-12: Long-distance serial connection for multiple safety gates, reduces wiring work.

I can export this whole text into pure plain text (without tables) for direct copy to Excel, or provide the wiring diagram + fault LED troubleshooting list in English. Do you need that?