Page
4
of
8
Two short pulses every 2 seconds
Microcontroller memory failure. In such case it is
necessary to upload firmware or repair the expander.
2.3 Power supply
The XM-8DR requires 12VDC nominal power supply. If the voltage is below ~10V then the module
stops its operation, deactivates all relays and signals the error by means of LED Power indicator
(blinks 10 times per second).
Note: For proper communication by means of RACS Clock& Data bus it is required to connect all
GND terminals of devices. Such requirement is satisfied if both devices are supplied from the same
point. If devices are supplied from different power supply units then GND terminals of
communicating devices must be connected by means of separate wire in order to equalize
potentials. Any wire section can be applied.
2.4 Module mounting
XM-8DR-BRD module is not adapted to outdoor operation and it is installer responsibility to apply
proper method and location for module installation. The module is accompanied with two adapters
for installation on DIN 35mm rail. Optionally, XM-8DR-BRD can also be installed on flat surface by
means of included nylon studs.
Note: For proper operation of XM-8DR with PRxx2 series access controllers it is necessary to put
jumper on contacts JP6 in order to maintain compatibility with previous versions of XM-8.
Fig. 3 Mounting holes in XM-8DR-BRD board
3.
C
ONFIGURATION
3.1 Expander configuration
The configuration of XM-8DR-BRD is performed by means of jumpers according to table 4.
