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Ancillary devices are connected to the ‘AUX’ socket using
the ancillary lead as shown in Figure 9.
4.5 Connecting to an
Ancillary Device
4.6 Using IR Mode
Fig. 9: Connecting to an Ancillary Device
Connecting to an Ancillary Device
Plug the 3-pin header into the matching three holes or
connector on the MX device. The device can be powered
off, or connected to an operational MX loop. The ancillary
lead will power the device sufciently to communicate
with it and override the MX loop communications.
Available Connections
It is good practice to connect only a detector or one
ancillary device at a time. The 850EMT is equipped with a
port interlock feature.
When the ancillary lead is connected to the AUX socket,
communication via the IR link and base connection are
disabled.
When the ancillary lead is removed, the 850EMT will be
able to communicate via the IR link and the tool base
connection will be re-enabled.
The 850EMT may be connected to an ancillary device
that is also connected to and powered from the
addressable loop. However, a ‘No Response’ fault for
that device may be generated at the Control Panel under
these conditions.
Using Infrared Mode
Infrared communications can be used with certain MX
detectors and modules that contain the IR transceiver
(currently 850 Series detectors and Quad I/O modules).
The devices need to be connected to and powered by
the compatible MX panel and IR mode needs to be
enabled on the panel before IR mode can be used. Refer
to the specic Fire Panel Operator’s Manual.
With IR mode enabled, carefully point the 850EMT at
the MX device until the yellow LED on the device ashes
to indicate successful communications. If successful
IR comms are enabled (see section 5.6) the 850EMT
will beep with a specic chirp when it can successfully
communicate with the device using IR.
Keep the 850EMT pointing at the device and use its
screens and buttons to select the required functions.
Note that if the 850EMT no longer points directly at the
device, IR communication will stop working.
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