Addressable Fire Detection / Bases Bases The ST-ABI-SCW is compatible with the ESP range of sensors and does not require a loop address. A remote fire LED facility is provided when a sensor is attached to the base. ST-ABI-SCW Model ST-ABI-W is a Common Mounting Base, which is fully compatible with the ESP range of sensors. ST-ABI-W Model ST-ABS2-R is a Sounder Mounting Base, which is fully compatible with the ESP range of sensors ST-ABS2-R The ST-ABS3-SCR Base has been designed to be used with the red ST-AWS-R Wall Sounder or ST-AWSF-RWL Wall Sounder Beacon. ST-ABS3-R Model ST-ABSF-WWL is an addressable loop powered Base Sounder with integral Beacon, innovatively designed to give a range of tones and volumes with a maximum output of up to 98 dB(A) (±2 dB(A)) with low current consumption ST-ABSF-WWL The unit is designed to fit to the Standard Base (ST-ABI) or the Isolator Base (ST-ABI-SC) and can be fitted with any of the ESP Range of Sensors, Beacons or Remote Indicators. ST-ABS-W The Ingress Protection Rating of the ST-AWS-R is increased from IP21 (internal use) to IP67 (external use) when used in conjunction with the ST-AKWB-R. ST-AKWB-R