Honeywell 4219 Ademco Wired Zone Expander[Product Information]- Enter your model numberto make sure this fits.
- Can be located anywhere along the four-wireaddressable ECP bus
- Simple DIP switch addressing to select range ofzone numbers
- Adds up to eight class B zone inputs to an ECP busaddressable system， each with 1K end-of-line resistor
- Class B loops provide a broad， 300 ohm tolerance
- Supervised for open， shorted and normal circuitconditions
