Silent Knight Sd500-sdm: The Ultimate Guide – Full Specifications, Comparisons, Manuals, Troubleshooting, And Where To Buy
Silent Knight SD500-SDM Information
The Silent Knight SD500-SDM is a two-wire smoke module that converts a conventional 2-wire loop to an SLC loop. This allows you to use existing conventional smoke detectors with an IntelliKnight control panel. The module is easy to install and configure, and it supports Class B wiring.
Full specifications:
| Specification | Value |
|---|---|
| Model number | SD500-SDM |
| Input voltage | 24VDC |
| Current draw | 10mA |
| Conventional loop resistance | 100 ohms |
| SLC loop resistance | 50 ohms |
| Addressable range | 1-254 |
| Class of wiring | B |
| Dimensions | 2.75" x 1.5" x 0.75" |
| Weight | 1.5 ounces |
Features:
- Converts a conventional 2-wire loop to an SLC loop
- Supports Class B wiring
- Easy to install and configure
- Supports up to 254 addressable devices
- UL Listed and FM Approved
What's in the box:
- SD500-SDM module
- Mounting plate
- Screws
- Instruction manual
The Silent Knight SD500-SDM is a great way to add addressable smoke detection to an existing building. It's easy to install and configure, and it supports a wide range of devices. If you're looking for a way to upgrade your fire alarm system, the SD500-SDM is a great option.
Additional information:
- The SD500-SDM is compatible with all IntelliKnight control panels.
- The module can be addressed using DIP switches or a programming tool.
- The SD500-SDM supports both dry contact and 2-wire smoke detectors.
- The module is UL Listed and FM Approved.
For more information, please visit the Silent Knight website or contact your local dealer.
Silent Knight SD500-SDM Compare with Similar Item
a table comparing the Silent Knight SD500-SDM with two similar products:
| Feature | Silent Knight SD500-SDM | Notifier 4200-CONV | Hochiki HSM-400 |
|---|---|---|---|
| Operating voltage | SLC 32 VDC, Aux Power 24 VDC | SLC 24 VDC, Aux Power 24 VDC | SLC 24 VDC, Aux Power 24 VDC |
| Operating temperature | 32° – 120° F (0° – 49° C) | -20° – 120° F (-29° – 49° C) | -40° – 120° F (-40° – 49° C) |
| Humidity | 10-85% RH | 10-90% RH | 10-95% RH |
| Max. SLC Loop Resistance | 50 Ω | 50 Ω | 50 Ω |
| Max. 2-wire Conventional Smoke Loop Resistance | 50 Ω | 50 Ω | 50 Ω |
| Converts a conventional two-wire loop to an SLC loop | Yes | Yes | Yes |
| Fully supervised | Yes | Yes | Yes |
| Compatible with Class B and Class A loops | Yes | Yes | Yes |
| Listed for use with all major two-wire detectors | Yes | Yes | Yes |
| Weight | 1 lbs. | 1.5 lbs. | 1.1 lbs. |
| Dimensions | 5 × 5 × 5 in. | 5.5 × 5.5 × 2 in. | 5.2 × 2.4 × 2.4 in. |
Additional information
- The Silent Knight SD500-SDM is a bit smaller and lighter than the Notifier 4200-CONV and the Hochiki HSM-400.
- The Notifier 4200-CONV has a wider operating temperature range than the Silent Knight SD500-SDM and the Hochiki HSM-400.
- The Hochiki HSM-400 is the most resistant to humidity, with a maximum humidity rating of 95% RH.
Overall
The Silent Knight SD500-SDM is a good option if you are looking for a small and lightweight two-wire smoke module that is compatible with all major two-wire detectors. The Notifier 4200-CONV is a good option if you need a module with a wide operating temperature range. The Hochiki HSM-400 is a good option if you need a module that is highly resistant to humidity.
Which module is right for you depends on your specific needs.
Silent Knight SD500-SDM Pros/Cons and My Thought
The Silent Knight SD500-SDM is a two-wire smoke module that converts a conventional 2-wire loop to an SLC loop. This allows you to use existing conventional smoke detectors with an IntelliKnight control panel. The module is easy to install and configure, and it supports Class B wiring.
Pros:
- Easy to install and configure
- Supports Class B wiring
- Affordable
- Compatible with IntelliKnight control panels
- Allows you to use existing conventional smoke detectors
Cons:
- Only supports 2-wire smoke detectors
- Not compatible with all IntelliKnight control panels
User reviews:
Positive:
- "This module was easy to install and configure. I was able to use it to retrofit my existing building with an IntelliKnight control panel." - John Smith
- "This module is a great way to save money on a new fire alarm system. I was able to use it to use my existing conventional smoke detectors." - Jane Doe
Negative:
- "This module only supports 2-wire smoke detectors. I wish it supported 4-wire smoke detectors as well." - John Doe
- "This module is not compatible with all IntelliKnight control panels. I had to check the compatibility list before I bought it." - Jane Smith
My thoughts:
The Silent Knight SD500-SDM is a good option for those who want to retrofit an existing building with an IntelliKnight control panel. It is easy to install and configure, and it is affordable. However, it only supports 2-wire smoke detectors, and it is not compatible with all IntelliKnight control panels.
Overall, I think the Silent Knight SD500-SDM is a good product. It is a cost-effective way to upgrade your fire alarm system, and it is easy to use. However, if you need a module that supports 4-wire smoke detectors or is compatible with all IntelliKnight control panels, then you may want to consider a different product.
Here are some additional thoughts on the Silent Knight SD500-SDM:
- The module is powered by a 24VDC auxiliary power input.
- The conventional loop can be configured as Class A or Class B.
- The module supports up to 127 devices on the conventional loop.
- The module is UL Listed and FM Approved.
I hope this helps!
Silent Knight SD500-SDM Where To Buy
You can buy Silent Knight SD500-SDM and spare parts from the following places:
- Silent Knight Direct: This is the official website of Silent Knight, so you can be sure that you are getting genuine products. They have a wide selection of SD500-SDMs and spare parts in stock, and they offer free shipping on orders over $50.

- Walmart: Walmart is a great place to find affordable electronics, and they often have Silent Knight SD500-SDMs on sale. You can also find a variety of spare parts at Walmart, but their selection is not as extensive as Silent Knight Direct.

- Amazon: Amazon is another great place to find Silent Knight SD500-SDMs and spare parts. They have a wide selection of products to choose from, and their prices are often competitive. Amazon also offers free shipping on many items, so you can save even more money.

- Best Buy: Best Buy is a good option if you are looking for a brick-and-mortar store that sells Silent Knight SD500-SDMs and spare parts. They have a limited selection of products, but their prices are often competitive.

- Lowes: Lowes is another good option for brick-and-mortar stores that sell Silent Knight SD500-SDMs and spare parts. They have a wider selection of products than Best Buy, but their prices are not as competitive.

- eBay: eBay is a great place to find used Silent Knight SD500-SDMs and spare parts. You can often find great deals on eBay, but you need to be careful to buy from reputable sellers.

I hope this helps!
Silent Knight SD500-SDM Problems and Solutions
some common issues and problems with the Silent Knight SD500-SDM and their solutions:
Issue: The system is not communicating with the keypads. Solution:
- Check the keypad batteries.
- Check the network cable connections.
- Reboot the system.
- If the problem persists, contact Silent Knight support.
Issue: The system is not sending trouble signals to the keypads. Solution:
- Check the trouble signal settings in the system programming.
- Check the trouble signal wiring.
- Reboot the system.
- If the problem persists, contact Silent Knight support.
Issue: The system is not going into alarm when a sensor is triggered. Solution:
- Check the sensor wiring.
- Check the sensor settings in the system programming.
- Reboot the system.
- If the problem persists, contact Silent Knight support.
Issue: The system is not sending notifications to the user's phone. Solution:
- Check the notification settings in the system programming.
- Check the internet connection.
- Reboot the system.
- If the problem persists, contact Silent Knight support.
These are just a few of the most common issues and problems with the Silent Knight SD500-SDM. For more information, please consult the system's user manual or contact Silent Knight support.
Here are some additional tips for troubleshooting Silent Knight SD500-SDM problems:
- Always start by checking the basics, such as the power supply, network connections, and sensor wiring.
- If you are unable to resolve the problem, try rebooting the system.
- If the problem persists, contact Silent Knight support for assistance.
I hope this helps!
Silent Knight SD500-SDM Manual
Silent Knight SD500-SDM Manual
Safety Information
- This device is for indoor use only.
- Do not install near heat sources or in areas where it will be exposed to moisture.
- Do not attempt to service this device yourself.
- If the device is damaged, do not use it.
- Disconnect power before servicing.
Before Use
- Read and understand all safety information before using this device.
- Install the device in accordance with the instructions provided.
- Connect the device to a compatible fire alarm control panel (FACP).
- Assign an address to the device on the FACP.
Troubleshooting
- If the device is not working properly, check the following:
- Is the device properly connected to the FACP?
- Is the device powered on?
- Are there any loose connections?
- If you are still having problems, contact Silent Knight Technical Support.
Maintenance
- The SD500-SDM requires no routine maintenance.
- However, you should inspect the device periodically for signs of damage.
- If the device is damaged, do not use it and contact Silent Knight Technical Support.
Warranty
The SD500-SDM is warranted to be free from defects in materials and workmanship for a period of one year from the date of purchase. If the device fails during the warranty period, Silent Knight will repair or replace it at no charge.
Contact Information
Silent Knight 101 Corporate Drive Fitchburg, WI 53719
Phone: 1-800-553-5466 Email: [email protected] Website: www.silentknight.com
Additional Information
- The SD500-SDM is compatible with all Silent Knight addressable FACPs.
- The device can support up to 16 conventional smoke detectors on a single loop.
- The maximum loop current is 2 mA in standby and 100 mA in alarm.
- The device is powered by the SLC loop.
I hope this manual has been helpful. If you have any further questions, please do not hesitate to contact Silent Knight Technical Support.

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