AIPHONE IER-2 19501 Chime Extension Speaker

The AIPHONE IER-2 (model 19501) is a chime extension speaker built to connect with Aiphone intercom systems. It supports both hands-free voice operation (VOX) and push-to-talk (PTT) communication modes.

This unit operates on a 15V AC power supply, requiring the PT-1211C transformer with 120V input. Its wiring specifications include Aiphone cables #822202 or #871802 for door-to-master connections and #812205 or #871804 for master-to-sub master connections.

The maximum wiring distances are 360 feet with 22 AWG wire and 1020 feet with 18 AWG wire from door to master, and up to 330 feet from the master to the farthest sub speaker. The door release contact rating is 9.5 to 20V AC with 70 ohms resistance or compatible with the EL-12S unit.