Maxitrol SC25S-B Signal Conditioner
When you're interfacing a Building Management System (BMS) with Maxitrol Selectra series equipment, the Maxitrol SC25S-B Signal Conditioner is the industry standard for reliable signal translation. This precision analog component converts a 4-20mA or 0-10VDC control signal into a proportional 0-20VDC output, specifically designed to drive modulating gas valves like the M411, M511, and M611 series. As a veteran tech knows, the "B" designation indicates a versatile dual-input capability, allowing you to field-configure the unit via a 3-position DIP switch to match your controller's output without swapping hardware.
The SC25S-B is more than a simple converter; it functions as a critical discharge air temperature limit controller. By integrating a TS194Q sensor, the unit actively monitors for high or low temperature excursions. If the sensed discharge air hits your setpoints, the SC25S-B signal conditioner overrides the external BMS signal to protect the heat exchanger from overheating or to prevent cold drafts. It also features an adjustable low-fire start timer (5 to 30 seconds), ensuring stable burner ignition before the modulating valve responds to full demand. For contractors, this means better HVAC system integration and reduced call-backs related to burner instability during startup.
Key Benefits for the Contractor:- Universal Input Compatibility: Seamlessly bridges the gap between 4-20mA or 0-10VDC BMS outputs and 0-20VDC Maxitrol Selectra gas valves.
- Integrated Temperature Protection: Dual-limit monitoring for discharge air ensures safe operation and protects downstream ductwork and components.
- Enhanced Ignition Stability: The built-in low fire start timer provides a dedicated window for consistent burner crossover before modulation begins.
- Reduced Hardware Footprint: Track-mounted design allows for clean, professional installation inside existing control panels or electrical enclosures.
- Precision Gas Modulation: Eliminates "hunting" and signal noise to provide smooth, linear gas flow control for direct or indirect fired applications.
How do I switch between 4-20mA and 0-10VDC inputs?
The input is selected using the internal 3-position DIP switch. Ensure the power is cycled after changing settings to ensure the processor registers the new analog signal conversion parameters.
Does this unit require a specific sensor for temperature limiting?
Yes, for the discharge air temperature limits to function, you must use a Maxitrol TS194Q sensor. Without the sensor, the unit will still convert signals but will not provide limit protection.
Can one SC25S-B drive multiple valves?
The unit is robust enough to drive multiple Selectra valves in parallel, provided the total current draw does not exceed the unit’s maximum output rating. Always verify cumulative VA requirements before wiring.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $357.34
-65%$357.34
$125.07Maxitrol SC25S-B Signal Conditioner
When you're interfacing a Building Management System (BMS) with Maxitrol Selectra series equipment, the Maxitrol SC25S-B Signal Conditioner is the industry standard for reliable signal translation. This precision analog component converts a 4-20mA or 0-10VDC control signal into a proportional 0-20VDC output, specifically designed to drive modulating gas valves like the M411, M511, and M611 series. As a veteran tech knows, the "B" designation indicates a versatile dual-input capability, allowing you to field-configure the unit via a 3-position DIP switch to match your controller's output without swapping hardware.
The SC25S-B is more than a simple converter; it functions as a critical discharge air temperature limit controller. By integrating a TS194Q sensor, the unit actively monitors for high or low temperature excursions. If the sensed discharge air hits your setpoints, the SC25S-B signal conditioner overrides the external BMS signal to protect the heat exchanger from overheating or to prevent cold drafts. It also features an adjustable low-fire start timer (5 to 30 seconds), ensuring stable burner ignition before the modulating valve responds to full demand. For contractors, this means better HVAC system integration and reduced call-backs related to burner instability during startup.
Key Benefits for the Contractor:- Universal Input Compatibility: Seamlessly bridges the gap between 4-20mA or 0-10VDC BMS outputs and 0-20VDC Maxitrol Selectra gas valves.
- Integrated Temperature Protection: Dual-limit monitoring for discharge air ensures safe operation and protects downstream ductwork and components.
- Enhanced Ignition Stability: The built-in low fire start timer provides a dedicated window for consistent burner crossover before modulation begins.
- Reduced Hardware Footprint: Track-mounted design allows for clean, professional installation inside existing control panels or electrical enclosures.
- Precision Gas Modulation: Eliminates "hunting" and signal noise to provide smooth, linear gas flow control for direct or indirect fired applications.
How do I switch between 4-20mA and 0-10VDC inputs?
The input is selected using the internal 3-position DIP switch. Ensure the power is cycled after changing settings to ensure the processor registers the new analog signal conversion parameters.
Does this unit require a specific sensor for temperature limiting?
Yes, for the discharge air temperature limits to function, you must use a Maxitrol TS194Q sensor. Without the sensor, the unit will still convert signals but will not provide limit protection.
Can one SC25S-B drive multiple valves?
The unit is robust enough to drive multiple Selectra valves in parallel, provided the total current draw does not exceed the unit’s maximum output rating. Always verify cumulative VA requirements before wiring.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
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Description
When you're interfacing a Building Management System (BMS) with Maxitrol Selectra series equipment, the Maxitrol SC25S-B Signal Conditioner is the industry standard for reliable signal translation. This precision analog component converts a 4-20mA or 0-10VDC control signal into a proportional 0-20VDC output, specifically designed to drive modulating gas valves like the M411, M511, and M611 series. As a veteran tech knows, the "B" designation indicates a versatile dual-input capability, allowing you to field-configure the unit via a 3-position DIP switch to match your controller's output without swapping hardware.
The SC25S-B is more than a simple converter; it functions as a critical discharge air temperature limit controller. By integrating a TS194Q sensor, the unit actively monitors for high or low temperature excursions. If the sensed discharge air hits your setpoints, the SC25S-B signal conditioner overrides the external BMS signal to protect the heat exchanger from overheating or to prevent cold drafts. It also features an adjustable low-fire start timer (5 to 30 seconds), ensuring stable burner ignition before the modulating valve responds to full demand. For contractors, this means better HVAC system integration and reduced call-backs related to burner instability during startup.
Key Benefits for the Contractor:- Universal Input Compatibility: Seamlessly bridges the gap between 4-20mA or 0-10VDC BMS outputs and 0-20VDC Maxitrol Selectra gas valves.
- Integrated Temperature Protection: Dual-limit monitoring for discharge air ensures safe operation and protects downstream ductwork and components.
- Enhanced Ignition Stability: The built-in low fire start timer provides a dedicated window for consistent burner crossover before modulation begins.
- Reduced Hardware Footprint: Track-mounted design allows for clean, professional installation inside existing control panels or electrical enclosures.
- Precision Gas Modulation: Eliminates "hunting" and signal noise to provide smooth, linear gas flow control for direct or indirect fired applications.
How do I switch between 4-20mA and 0-10VDC inputs?
The input is selected using the internal 3-position DIP switch. Ensure the power is cycled after changing settings to ensure the processor registers the new analog signal conversion parameters.
Does this unit require a specific sensor for temperature limiting?
Yes, for the discharge air temperature limits to function, you must use a Maxitrol TS194Q sensor. Without the sensor, the unit will still convert signals but will not provide limit protection.
Can one SC25S-B drive multiple valves?
The unit is robust enough to drive multiple Selectra valves in parallel, provided the total current draw does not exceed the unit’s maximum output rating. Always verify cumulative VA requirements before wiring.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
