Important: A switch chain comprising the following switches can be connected to the AR evaluation unit:
CES-AR-C01 / CES-AR-C02 / CES AR-C04 / ESL-AR / CET- AR / CTP-AR
FunctionThe AR evaluation unit is used to evaluate the individual safety switches in a CES-AR-… switch chain and the safe interruption of a safety circuit.
The unit has two inputs for connection of a CES-AR… switch chain. The safety contacts are switched as a function of the input signals. Downstream parts of the safety circuit can be monitored using a feedback loop.
The switching states of the connected safety switches can be signaled by means of monitoring outputs.
If the actuator on one of the safety switches in the switch chain is moved out of the operating distance, the AR evaluation unit opens its contacts and the corresponding monitoring output is reset.
The system is designed so that failures will not result in the loss of the safety function. The occurrence of failures is detected by cyclic self-monitoring at the latest at the next demand to close the safety contacts.
The system can be started either manually using a start button or automatically.
Category according to EN ISO 13849-1Due to two redundant safety paths (relay contacts) with 2 internal, monitored normally open contacts per safety path, suitable for:
- Category 4/PL e according to EN ISO 13849-1
Each safety path is independently safe.
LED indicator
| STATE | Status LED |
| DIA | Diagnostics LED |
| OUT | Safe state/self-test |
Important:The plug-in connection terminals are not included and must be ordered separately.
Dimension drawing
Wiring diagram
Wiring diagram
Dimension drawingWiring diagramWiring diagram
Technical dataApprovals
Mechanical values and environment
| Dimensions | 114 x 99 x 45 |
| Housing material | Plastic PA6.6 |
| Weight | |
| Net | 0,25 kg |
| Ambient temperature | |
| At UB = DC 24 V | -20 … 55 °C |
| Atmospheric humidity | |
| Not condensing | max.80 % rH |
| Degree of protection | IP20 |
| Resilience to vibration | In acc. with EN 60947-5-2 |
| Mounting method | Mounting rail 35 mm according to EN 60715 |
| Ready delay | max.8 s |
| Connection | Plug-in screw terminals coded |
| Number of LED displays | 3 |
| O1 … O12 | |
| Number of monitoring outputs | 12 |
| Start button S | |
| Manual start operating mode | |
| Response delay start button | 300 … 600 ms |
| Duration of operation of start button | min.250 ms |
| 13/14, 23/24, 33/34, 43/44 | |
| Number of safety contacts | 4 Relays with internally monitored contacts |
| Mechanical life | |
| Relay | 10 x 106 |
| Switching frequency | 1 Hz 100 mA, a switching frequency of 0.1 Hz should not be exceeded as this will affect the mechanical life of the relay contacts.’> |
Electrical connection ratings
| Operating voltage DC | |
| UB | 24 V DC -10% … 10% Regulated, residual ripple < 5 % |
| Current consumption | |
| IB (with relay energized) | 1200 mA |
| Fusing | |
| External (operating voltage UB) | 2,5 … 8 A |
| Rated insulation voltage Ui | 250 V |
| Rated impulse withstand voltage Uimp | 4 kV |
| EMC protection requirements | In acc. with EN 60947-5-3 |
| Degree of contamination (external, according to EN 60947-1) | 2 |
| Connection cross-section | 0,14 … 2,5 mm? |
| Switching delay from state change | max.480 ms |
| STATE | |
| LED indicator | |
| STATE | Green LED: Status of the device |
| OUT | |
| LED indicator | |
| OUT | Yellow LED: State of the AR chain |
| IA, IB | |
| Number of connectible safety switches | max.12 |
| Safety inputs | 2 (for CES-AR switch chain) |
| 13/14, 23/24, 33/34, 43/44 | |
| Switching current | |
| Relay outputs (at switching voltage AC 5 … 230 V) | 10 … 5000 mA |
| Relay outputs (at switching voltage AC/DC 21 … 60 V | 1 … 300 mA |
| Relay outputs (at switching voltage AC/DC 5 … 30 V) | 10 … 6000 mA |
| Fusing | |
| External (safety circuit) according to EN 60269-1 | 6 AgG or 6 A circuit breaker (characteristic B or C) |
| Utilization category according to EN 60947-5-1 | |
| AC-15 | 230 V 5 A |
| DC-13 | 24 V 5 A |
| AC-12 | 60 V 0.3 A |
| 30 V 6 A | |
| DC-12 | 30 V 6 A |
| 60 V 0.3 A | |
| Discrepancy time | |
| Between the operating points of both relays | max.25 ms |
| Start button S | |
| Input current | |
| HIGH | 5 … 8 … 10 mA |
| Input voltage | |
| HIGH | 15 … UB V DC |
| LOW | 0 … 2 V DC |
| Y1/Y2 | |
| Current via feedback loop | 5 … 8 … 10 mA |
| permissible resistance in feedback loop | max.600 ? |
| DIA | |
| LED indicator | |
| DIA | Red LED: Fault display |
| Type of output | Semiconductor output, p-switching, short circuit-proof |
| Output voltage | |
| HIGH | UB — 20% … UB V DC |
| LOW | 0 … 1 V DC |
| Output current | max.20 mA |
| O1 … O12 | |
| Type of output | Semiconductor outputs, p-switching, short circuit-proof |
| Output voltage | |
| LOW | 0 … 1 V DC |
| High | UB — 20% … UB V DC |
| Output current | max.20 mA |
| OUT AR | |
| Type of output | Semiconductor output, p-switching, short circuit-proof |
| Output voltage | |
| HIGH | UB — 20 % … UB V DC |
| LOW | 0 … 1 V DC |
| Output current | max.20 mA |
Reliability values according to EN ISO 13849-1
| Monitoring of the safety guard position | |
| Category | 4 |
| Performance Level | PL e |
| PFHD | 1.5 x 10-8 |
| Number of switching cycles | |
| ? 3 A at 24 V DC | max.107000 1/Jahr |
| ? 1 A at 24 V DC | max.540000 1/Jahr |
| ? 0.1 A at 24 V DC | max.720000 1/Jahr |
| Mission time | 20 y |
