MCX16-AP Operating manual.doc
2018-11-29
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output polarity is done within low level configuration using RogerVDM software. By default, outputs are
configured with normal polarity. Outputs are assigned with functions using VISO management software.
REL1 and REL2 outputs
The expander offers two relay outputs REL1 and REL2. Each relay offers NO/NC terminals and is 30V/1.5A
rated. In case of power outage both relays remain in the off state. Outputs are assigned with functions using
VISO management software.
AUX power output
AUX power supply output is dedicated to supply additional devices. The terminal AUX+ is protected with
1.0A electronic fuse. The terminal AUX- is internally shorted to ground.
TML power output
TML power supply output is dedicated to supply additional devices. The terminal TML+ is protected with
0.2A electronic fuse. The terminal TML- is internally shorted to ground.
Connection of expander to controller
The expander is operated as an extension of MC16 access controller. After addressing in 100-115 range the
expander is connected to RS485 communication bus of controller where MCT readers and other MCX
expanders are usually also operated. Any topology of communication bus can be used in RACS 5 system
(e.g. star, tree) and the matching resistors (terminators) connected at the ends of transmitting lines are not
required. The communication works with any signal cables e.g. U/UTP cat.5. All devices connected to the
same bus should have GND terminals connected. The RS485 communication standard in RACS 5 system
offers proper communication in a distance of up to 1200 meters as well as high resistance to interferences.
It is recommended to supply the MCX16-AP from own transformer and equip it with backup battery (fig.4).
Alternatively the expander can be supplied from AUX output of MCX2D/MCX4D expander within MC16-
PAC-2/3/4/-KIT (fig. 5) or AUX output of MC16 controller supplied from 18VAC transformer and equipped
with own battery (fig.6).
Fig. 4 Connection diagram for expander with own supply (recommended)
