RFBG-131-AR-24AC-DC Functional Safety Relay

Functional safety relay RFBG-131-AR-24AC-DC — image 2

Functional safety relay RFBG-131-AR-24AC-DC — image 3

Functional safety relay RFBG-131-AR-24AC-DC — image 4

Product Description

The RFBG safety relay input terminals receive signals for emergency stops, protective gates, and safety light curtains—i.e., signals from devices with normally closed contacts that are used for emergency braking or to protect people entering hazardous areas—and are widely used in mechanical engineering and other industries.

Advantages

1oo2 architecture.
Detection of short circuits on contacts.
Automatic and manual reset.
The safety function remains operational even if components fail.
Correct operation of the safety relay is tested.

Main parameters
Voltage range, V	~/=24
Voltage tolerances, V	0,85… 1,1
Frequency, Hz	Frequency, Hz 50… 60
Heat output, W	≤ 2.2 at =24 V, ≤ 5.4 at ~24 V
Current consumption at =24 V, mA	≤ 50
Cable resistance, Ohm	15
Input devices	Emergency stop button, safety gate, PNP safety light curtain
Signal type	3no + 1nz
Contact type	forced management
Contact material	AgSnO₂ + 0.2 μm Au
Load characteristics	AC-15: 5 A / 230 V; DC-13: 5 A / 24 V
Fuse characteristics	10 A gL/gG(no), 6 A gL/gG(no)
Response time, ms	Auto: ≤ 300, manual: ≤ 150
Opening, ms	Auto stop: ≤ 30, power failure: ≤ 100
Recovery time, ms	Auto stop: ≤ 30, power failure: ≤ 100
Power interruption, ms	20
Electromagnetic compatibility	IEC/EN 80947, IEC 61326-3-1, IEC/EN 61000-6-2, IEC/EN 61000-6-4
Nominal insulation voltage , V AC	250
Nominal pulse voltage, V	6000 (1.2/50 µs)
Dielectric strength, V	1500 (within 1 min)
Gaps and leaks	According to IEC 80947-1
Vibration, Hz	10…55 (0.35 mm)
Overvoltage category	III
Degree of pollution	2
Degree of dust and moisture protection	IP20
Operating temperature, °C	-20…. +60
Storage temperature, °C	-40…. +80
Altitude above sea level, m	≤ 2000
Number of operations, cycles	10 x 10⁶
Security parameters
Safety Integrity Level (SIL)	3
Average diagnostic coverage (DC _avg), %	99
Mean time to failure (MTTF_D), years	164
Hardware Fault Tolerance (HFT)	1
Safe failure rate (SFF), not less than, %	99
Average probability of dangerous failure on demand (PFD_avg/PTI)	1,29×10^-5
Probability of failure per hour (PFH), 1/h	1,49×10^-10
Stop category	0
Connection diagram

Possible applications:

Input: "Emergency stop", 1-channel.
Without short-circuit signaling on contacts.
Automatic reset.
Output: 3 NO + 1 NC (auxiliary).

Input: "Emergency stop", 2-channel.
Without short-circuit signaling on contacts.
Manual reset.
Output: 3 NO + 1 NC (auxiliary).

Input: "Emergency stop", 2-channel.
With short-circuit signaling on contacts.
Automatic reset, EDM function*.
Output: 3 NO + 1 NC (auxiliary).

Input: "Emergency stop", 2-channel.
With short-circuit signaling on contacts.
Manual reset, EDM function*.
Output: 3 NO + 1 NC (auxiliary).

Input: PNP light curtain signal.
With short-circuit signaling using a ZECHA**.
Manual reset, EDM function*.
Output: 3 NO + 1 NC (auxiliary).

*EDM (External Device Monitor) is a device check for external devices, i.e., detecting faults in external devices (e.g., contact welding) in hazardous parts of electrical machines. External devices are typically safety relays or contactors. The device continuously monitors whether a specified voltage has been applied to the external relay's control input line and blocks it in the event of an error. If the response delay of the monitored relay exceeds 300 ms, it is considered an error.

Overall, the EDM function of a safety relay is an important safety protection function. It monitors the status of external equipment in real time and promptly detects and reports equipment failures to ensure that it can play a protective role in hazardous situations. This function is especially important in industrial scenarios where worker safety must be ensured while simultaneously performing precision machining.

**- Electro-sensitive protective equipment (ESPE) is a set of devices and/or components that act together to protect or detect a safety-related part of a system.

The safety-related electronic control system consists of at least:
- a sensing device;
- control/monitoring devices;
- switching devices for the output signal and/or information interface related to safety.