Safety Timer
SCB – Safety Time Relay for Functional Safety
The SCB is a universally applicable safety time relay, also referred to as a safety timer, designed for fast and safe shutdown of moving machine or system parts. It replaces conventional pneumatic time relays and ensures full compliance with the latest safety standards.
Depending on the configuration, the safety outputs can switch with on-delay, off-delay, or without delay, independently of one another. Time settings are easy to configure using the intuitive push/rotary button and integrated display.
Key Features
- Universal use as a safety time relay in functional safety applications
- Precise and simple time configuration via rotary push-button and display
- Multiple delay options: on-delay, off-delay, and instantaneous switching
- Extended diagnostics with detailed error messages on the display
- Fully electronic design – ideal as a replacement for pneumatic time relays
- Supports safe shutdown of furnaces in continuous operation
- Suitable for use in retrofits and new installations
Certified Safety – According to International Standards
The SCB is certified for use in safety-related systems according to:
- EN ISO 13849-1:2015
- EN 50156-1:2015
- IEC 62061:2005 + AC:2010 + A1:2013 + A2:2015
- IEC 61508 Parts 1–7:2010
- IEC 61511-1:2016
- EN 746-2:2010
The SCB – Safe Replacement for Pneumatic Time Relays
Previously used pneumatic time relays often no longer meet the requirements of the current state of the art. As a result, standard-compliant protection is no longer guaranteed in many existing systems.
With the SCB, you ensure compliance with EN 50156-1, EN ISO 13849-1, and other key standards – both in retrofit projects and in new burner installations.
No matter the industry – we offer the right safety time relay for your application.
Whether in process automation, mechanical engineering, or furnace technology: the SCB delivers safe, modern, and configurable time delay functions tailored to your needs.
| Type |
Safety |
Auxilliary |
1 / 2 channel wiring | Width in mm |
Time Rage | Approvals | |
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Safety Timer
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4 | 2 | 1/2 | 22,5 | 0.1 sec - 99 h |  |
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3 | 2 | 1/2 | 22,5 | 0.1 sec - 99 h | |
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2 | 2 | 1/2 | 22,5 | 0.1 sec - 99 h | |
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Compact Safety
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3 | 6 | 1/2 | 45 |
0.1 sec - 990 sec / min / 99h 3 independend times in one TALOS |
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Safety Timer
|
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4 | - | 1/2 | 22,5 | 0.3 sec - 30 sec |  |
Non safe Timer |
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- | 22,5 | 0.1 sec - 168 h |  |
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22,5 | 0.3 sec - 10 min | |
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45 |
T1: 0.2 - 30 min T2: 0.3 - 20 sec |
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48 | 0.01 sec- 999 h | |
| Type | possible applications | ||||||
Accessories |
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e.g.: ZPower: Mains supply for 230V connection SK3D: Contact amplification galvanic outputs |
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e.g.: Safe contact reinforcement Safe contact duplication |
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e.g.: Safe contact reinforcement Safe contact duplication |
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EKLT4 push-in twin spring connector
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All these variants are available with the following adjustable delay times:
- up to 99 sec
- up to 99 min
- up to 99 h
The SCB-04 is a universally applicable safety timer, with which the moving parts of a machine or plant can be brought to a standstill quickly and safely. Ist has two safe relays contacts and two safe semiconductor outputs.
The SCB-03 has three semiconductor outputs. Depending upon the configuration (programm Pr 00 - Pr 06), the safety outputs connect on-delay, off-delay or without delay independent of one another.
The SCB-02 has two safe relay contacts. A simple and accurate time parametrization is possible with a push/rotary button and the built-in display.
SR4C is a safety relay, which combines the non-delayed and delayed contacts in an extremely compact housing. As a result, dangerous parts of a plant can be switched off quickly and safely during an emergency.
NEW:
New switching function of the auxiliary outputs ease the retrofit
With the new variants of the mini safety timer SCB (e.g. SCB-02-01) you have the possibility to integrate the auxiliary outputs, analogue to the classic relay technique, inverted to the control concept. Especially in the case of a retrofit, it ease the exchange of an old, not state of the art pneumatic time relay.
New function for an automatic re-triggering leads to less system downtime as well as less intervention through the operating personal
The switch-off delay parameterised on the SCB can be used to filter a brief triggering of a limit monitor so that brief triggering of limit monitors, e.g. temperature, pressure or flow rate, must not lead to a switch-off.
New SCB function for a delayed reset signal for preventing accidental confirmations
With the new "delayed resetting" function, the danger of an accidental reset of the safety system can be prevented.
