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PRS-UM-BTN-EN-Rev02-02.2019
Cabling and Connections
Caution: All electrical connections should be made in accordance with any relevant local or
national legislation, standards or codes of practice.
Prosense BTN series detectors can operate between 12 - 24 VDC. The connection socket
located on main board. User should consider the cable lenght when performing installation in
the field. The Prosense detector requires a power supply between 12VDC and 24VDC. Make
sure that a minimum 12 VDC supply available at the detector entrance and consider the
voltage drop due to cable resistance in case of long distance applications.
The use of industrial grade, suitably shielded field cable is recommended. The best practices
shown that, screened 4 cores (plus screen 90% coverage), suitably mechanically protected
copper cable with a suitable explosion-proof gland, or ¾” NPT steel conduit, depending on the
distance between signal received or control panel and detector. It is recommended to use 1.5
mm2 (16 AWG) cable.
V+, V-(GND) ports must be connected via using two-wire cable to supply 16VDC power to
detector. If detector has RS485 communication module additional two wire cable should be
used to connect A and B to read the output signal of detector from A and B ports. Connections
should be made correctly with extra care to do not mix ports and not cause any damage on
the detectors. Detector power connection should be done with 1.5mm2 cross section cable.
The total distance between control panel and detectors should not exceed 1km.
The wiring for detectors utilized with RS485 board should be done by using connection cable
EIA RS485 2 core wires with section 0.22 / 0.35 mm2 and shielded. Nominal capacity between
the wires < 50pF/m and nominal impedance 120 Ohms.
In case RS485 communciation module used on detectors to monitor through DP32 control
panel, the V+, V- ports and A,B ports are located on different socket in both DP32 control
panel and detector side. The connections should be done with care to do not mix power and
RS485 ports. All detectors will be connected through one cable via hopping one detector to
another till the last detector on the line.
There should be one master device and up to 32 slave devices in RS485 communication. The
master is DP32 control panel and detectors will be the slave devices:
Diagram 4: RS485 communication
