Aiphone MAW-B - External Light Activation Relay

The MAW-B is a light activation relay. It switches on an auxiliary light to spotlight whoever is standing at the door station, so the camera or the answering party can see the caller. The light comes on when the door call button is pressed, and it also comes on whenever the system is put into visual monitoring mode from inside.

The MAW-B provides a dry closure contact rated for general lighting of less than 100W. Anything heavier than that, a flood array or a bank of fixtures, needs the MAW-B contact driving a separate contactor or power relay rather than carrying the load itself.

They are not interchangeable in the same way. The MAW-B is an Aiphone-specific accessory that ties into the intercom system to turn on an auxiliary light spotlighting a caller at the entrance, illuminating when the door call button is pushed and during visual monitoring mode. It provides a dry closure contact for general lighting of less than 100W. The Securitron RB-4 is a general-purpose relay board from the RB-4 Series with no intercom call-button or monitoring logic built in, so it would need separate trigger wiring and control logic from the intercom rather than dropping into the MAW-B role.

The MAW-B switches the light with the call event itself: it illuminates when the door call button is pushed and during visual monitoring mode, through a dry closure contact rated for general lighting under 100W. It does not provide an adjustable hold time. Where a timed duration after the trigger is what the job needs, the Securitron TM-2 Time Master II is a multi-function timer built for that role and can be driven from a trigger contact to hold an output for a set interval.

The MAW-B contact is a dry closure rated for general lighting of less than 100W, so a heavier fixture should not be switched directly by it. The usual approach is to let the MAW-B contact drive a separate power relay that carries the fixture load. A Securitron RB-4 relay board from the RB-4 Series is a general-purpose relay device commonly used as that intermediate switching stage, with the MAW-B providing the trigger contact.

Dry closure means the MAW-B supplies no voltage of its own; it just makes and breaks a set of contacts. You wire it in series with the entrance light's own supply, the same way a switch sits in the circuit. The light keeps running on its existing line power and the relay only decides when that line is completed.

Plan on 4-1/8 inches by 2-7/16 inches by 1-5/8 inches for the relay body itself, plus clearance for the conductors coming off it. It is small enough to sit inside a back box or a low voltage cabinet next to the intercom power supply.

It is a straight activation relay, not a timed one. The contact follows the call and monitoring events rather than holding for a set interval. If your job needs the light to hold on for a fixed duration after the call ends, that is a timer function, and a multi-function timer like the Securitron TM-2 Time Master II is the kind of device that does it.

No. The MAW-B is built around one job, turning on an entrance light on call and on monitor, with a contact rated under 100W for general lighting. For general switching or logic between access control devices, a relay board or logic pack, such as the Securitron RB-4 relay board or the Securitron RLP relay logic pack, is the right family of part.

Aiphone lists the MAW-B as a commercial product, and it is a powered electronic device rather than a passive accessory. Typical use is a multi-tenant or commercial entrance where the door station camera needs usable light at night.