Food and Packaging Industry Solutions
Series Variation Mean time to
dangerous failure (MTTFD)
Diagnostics coverage (DCavg) Mission time (TM)
Performance of Category 2 system (*1)
UL CSA TÜV CCC CE
Simple model (instantaneous)
Standard model (instantaneous)
330 years (100 years: When the limit value from EN ISO 13849-1 is applied) (MTTFD of fault output: 210 years)
Medium (90% minimum) (EN ISO 13849-1)
20 years (EN ISO 13849-1)
System that eliminates short-circuit fault detection when wiring from an input device Total width 41% DOWN Cost 45% DOWN
System with off-delay control system Total width 52% DOWN Cost 39% DOWN
● ● ● ● ●HR5S
Application: Safety circuit for machines
Reduction of cost and man-hours to introduce safety systems in low-risk machines
Category 2 safety relay module Compliant to international standards
❚ Low risk, category 2 safety circuit for food processing machines.
❚ In a category 2 circuit, the output device does not require redundancy. Saves cost and wiring compared to category 3.
❚ Category 2 architecture enables construction of PL = c and PL = d control systems.
Safety Relay Modules
41% DOWN Cost
45% DOWN ❚ After: Category 2 system configuration
Input device or output device does not require redundancy.
When the output device detects a failure, the alarm (light or buzzer) is output.
❚ Before: Category 3 system configuration Dual channel circuit with cross monitoring.
Two output devices are required. A single fault does not lead to the loss of the safety
❚ System that eliminates short-circuit fault detection when wiring from an input device
The circuit is monitored but the output device does not require redundancy.
If the safety function is impaired due to failure, the alarm (light or buzzer) is output by a
52% DOWN Cost
❚ System with off-delay control system
Performance of Category 2 system
Category 2 system configuration
IDEC Safety relay module HR1S-AF
Use existing devices such as pilot lightsIDEC Safety relay module