Page
2
of
8
1.
D
ESCRIPTION AND SPECIFICATION
The XM-8DR is I/O expander with 8 NO/NC input lines and 8 relay outputs with single NO/NC
contact each. The module is addressable and it is dedicated to devices with RACS Clock&Data
interface, namely RACS 4 controllers.
Optionally, XM-8DR can be used as standalone device (without communication with master device)
and then its outputs are controlled by means of voltage signals at respective inputs. Currently the
expander is available only as electronic module without enclosure and it is designated as XM-8DR-
BRD. With expander there are included adapters, which can be used for XM-8DR-BRD installation
on DIN 35 mm rail.
Table 1. Specification
Parameter
Description
Supply voltage
Nominal 12 VDC, min./max. 10-15VDC
Current consumption
25mA plus 40mA per each activated relay
Relay max load
30VDC/1.5A
Input lines
NO/NC inputs, electrically biased to +12V via 5.6k
Ω resistor,
triggering level approx. 3 V
Distance
Between controller and XM-8DR-BRD expander: max. 150 m
Environmental class
(according to EN 50131-1)
Class IV, -25C..+60C, relative humidity: 10 to 95% (no
condensation), indoor conditions
Dimensions (HxW)
72x155 mm
Weight
115g
Certificates
CE
2.
I
NSTALLATION
2.1 Terminals and connection diagram
Fig. 1 XM-8DR-BRD I/O expander
