P/N PM000158A • Rev. 2 • ISS 19JUN2018
1 of 3
© 2018 Ascom, Inc.
External Input Module Installation Sheet
Model NUMI2-HE
Description
The NUMI2-HE External Input module resides on the active
room bus. The module has two Ascom SafeConnect
sockets on the front face and two RGB LEDs (one above
each socket).
Module Connectors
The module includes two RJ-45 jacks for room bus
connections and DIP switches for room bus addressing.
Figure 1 shows the jacks and DIP switches on the back of
the module.
Figure 1: Module connections
Legend
(1) 2x RJ-45 connections to room bus
(2) DIP switches for bus addressing
Setting the Room Bus Address
The room bus address is a unique number assigned to a room
module when modules of the same type are attached to the
room bus.
If you do not use DIP switches to set the room bus address,
be sure all the DIP switches are in the OFF position on the
back of the module.
To set the DIP switches:
1. Set the DIP switches for the correct room bus address
(0...7), as shown in Figure 1, item 1.
2. Using a small screwdriver, gently slide the switch up for
“ON” or slide it down for “OFF.”
Installation
Note:
Before beginning the installation, ensure all the
necessary cables are available and are properly terminated.
RJ-45 connectors should be terminated in accordance with
the T568B or EIA 568B connection standard.
The module can mount to a backbox, or to a wall using a
surface-mounting spacer (NUSP1-HE).
To mount the module on a backbox or spacer:
1. When using a backbox, loosen the screws on the backbox
so that approximately 5mm extend out from the backbox
and the heads of the screws can pass through the keyhole
slots of the adapter plate.
-or-
When using a spacer, ensure it is properly mounted to the
wall and that the adapter screws are available.
2. Place the adapter (with the arrow facing up) over the
backbox and ensure that it is level.
