Aperio
®
Online Mechanical Installation Guide, Document No: ST-001323-B Date: 21 februari 2014
Aperio
®
Online
40
DIP 9
This DIP switch is not used.
DIP 10 – Internal/external antenna
Normally the internal antenna of the
communication hub is sufficient. In a difficult
installation environment or if the radio signal
needs to be amplified for extended range, an
external antenna can be used. Set the DIP 10 to
OFF to use an external antenna.
Connecting to the RS-485 bus
A
B
D1
D0
RED
GREEN
GND
8-24V
1
2
3
4
5
6
7
8
9
10
ON
The RS-485 bus should be made up of a twisted-
pair cable with characteristic impedance between
90 Ohm and 120 Ohm. Maximum bus length is
about 1000 m. Depending on the EAC system, a
maximum of 32 units (31 communication hubs
plus the EAC, when using the DIP Switch for RS-
485-addressing) can be connected to the same
bus.
Connect all RS485 A connectors together and
all RS485 B connectors together, depending on
connection type, see
Figure 17
and
Figure 18 on
page 39
.
Connecting to supply voltage
Connect the wires to 8-24 VDC, 1.1 W and GND
(ground) on the communication hub.
Note! The power supply shall be a Limited Power
Source (LPS) according to EN 60950-1. The power
supply shall be 3A over current protected. Wire
requirements 16-22 AWG.
