Enter an address from 1 to 126 for Apollo XP95/Discovery devices. Switches 1–7 set the address; switch 8 is not an address bit.
Note: For XP95/Discovery, set switch 8 to 0 (OFF) unless the specific device manual states otherwise.
Many Apollo sounder and VAD bases support both individual and group addressing:
- Individual addresses: 1–111 (set using the main 7-bit DIL switch)
- Group addresses: 112–126 (configured using a separate 4-segment DIL switch on the device base)
| Group Address | 4-Segment DIL (Base) |
|---|---|
| 112 | 0001 |
| 113 | 0010 |
| 114 | 0011 |
| 115 | 0100 |
| 116 | 0101 |
| 117 | 0110 |
| 118 | 0111 |
| 119 | 1000 |
| 120 | 1001 |
| 121 | 1010 |
| 122 | 1011 |
| 123 | 1100 |
| 124 | 1101 |
| 125 | 1110 |
| 126 | 1111 |
Important: Group addresses 112–126 may apply to certain sounder/VAD bases—see helper. Always confirm device-specific behaviour in the official manual.
Frequently Asked Questions
How do I set the address on an Apollo XP95 or Discovery device?
Use the 7-bit DIL switch (switches 1–7) on the device. Enter your desired address (1–126) in the calculator above, then set each switch to match the ON/OFF pattern shown.
What is switch 8 used for on XP95/Discovery devices?
Switch 8 is not used for addressing on XP95/Discovery. It may control other device-specific functions such as volume settings on sounders. Keep it OFF unless your device manual specifies otherwise.
What are group addresses (112–126) used for?
Group addresses allow multiple sounder or VAD devices to activate together. They are configured using a separate 4-segment DIL switch on compatible device bases. Individual addresses use 1–111.
Can I use address 0 or addresses above 126?
No. Apollo XP95/Discovery devices support addresses 1–126 only. Address 0 is invalid, and addresses above 126 exceed the 7-bit addressing range.
How is the binary conversion calculated?
The address is converted to 7-bit binary with the least significant bit (LSB) on switch 1. For example, address 5 = binary 0000101, so switches 1 and 3 are ON, all others OFF.
Does this work for manual call points and detectors?
Yes. All Apollo XP95 and Discovery devices—including manual call points, smoke detectors, heat detectors, and sounders—use the same 7-bit DIL switch addressing (1–126).