Environmental Monitoring System (EMS-01) Instruction Manual
16
3.3
Ancillary Devices
3.3.1
Signalling to an Ancillary Device
The EMS-01 can be connected to provide a signal to a range of ancillary devices such as a Building
Management System (BMS) or Short Message Service (SMS) alarm unit.
Figure 11:
Connection for Signalling to an Ancillary Device
Connect the EMS to an ancillary device as follows:
1.
Ensure that the unit is powered OFF. Refer
to
Figure 6
to select the correct
relay
for
the application.
2.
Connect the relevant relay
(Figure 11;
core
colours are for illustrative purposes only
and may differ during application
)
.
3.3.2
12/24V Output to Power an Ancillary Device
Figure 12:
Using the 12/24 Volt Output to Power an Ancillary Device
Use the EMS 12/24 Volt auxiliary output to power an ancillary device as follows:
1.
Ensure that the unit is powered OFF. Use
DIP Switch 8
to set the output to the
correct voltage for your device (default is
OFF/12V; see
section 4.1, Table 3
for DIP
Switch assignments and default settings).
2.
Connect your device to the 12/24V output,
250mA maximum (
Figures 6 and 12
).
DC OUT
0V
|
12/24V
CABLE TO DEVICE
Red Core: COM
Black Core: NO
CABLE TO DEVICE
Red Core: COM
Black Core: NC
ALARM RELAY 1
This device requires a
‘normally open’
condition for heathy status
ALARM RELAY 2
This device requires a
‘normally
closed
’
condition for heathy status
