Siemens
Siemens 3RG7847-4BB Dual-Channel Safety Relay
Siemens 3RG7847-4BB Dual-Channel Safety Relay.
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12-Mo Warranty
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🎖 Veteran-Owned
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12-month warranty
All units tested
Same-day dispatch
Order by 2pm CST
Worldwide delivery
US, EU, Asia, Middle East
Veteran-owned
CAGE: 9NK75
Dual-channel input
Safety Category 4
2 NO safety outputs
24V AC/DC operation
Compact design
Product description
The Siemens 3RG7847-4BB is a dual-channel safety relay designed to monitor safety devices such as E-stops and safety gates. It provides two normally open (NO) contacts for safety outputs and typically includes one normally closed (NC) feedback contact.
This safety relay is crucial in industrial automation for ensuring personnel safety. It is widely applied in machine guarding, emergency stop circuits, and applications requiring safety category 4 according to EN 954-1. Industries include automotive, packaging, and general manufacturing.
Stanlo Automation offers the Siemens 3RG7847-4BB safety relay. As a veteran-owned surplus distributor, we provide reliable components for your automation systems.
Technical specifications
| Voltage | 24VAC/DC |
| Contact Configuration | 2 NO (+1 NC feedback) |
| Safety Category | 4 (EN 954-1) |
| Series | 3RG78 |
Common applications
Emergency stop circuits
Safety gate monitoring
Machine guarding
Industrial safety systems
Automation control panels
Compatible systems
Safety switches
E-stop buttons
Safety gate interlocks
Also known as
Siemens 3RG7847-4BB Evaluation Unit
Siemens 3RG7847-4BB Siguard Safety Relay
Replaces / compatible with
This part may be discontinued or end of life. Contact Stanlo Automation for current availability and alternatives.
Technical note
Expert tip
Ensure both channels of the safety relay are correctly wired and monitored for proper safety function activation.What happens next?
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Frequently asked questions
What is the voltage rating for the Siemens 3RG7847-4BB?
The Siemens 3RG7847-4BB safety relay operates with a voltage supply of 24V AC or DC. This allows for flexibility in power source selection within industrial control systems.