Owner`s manual

PROGRAMMABLE WALL STATION
16 Owner’s manual
Connecting the CAN-Bus
Comprehensive guidelines regarding cabling and bus length are provided in chapter “CAN-Bus Principles”
starting on page 19.
Supply Voltage
Programmable wall stations need to be operated on a power source that delivers a direct-current voltage
between 9 volts and 58 volts. A central power supply unit or local power sources can be used if various
wall panels are operated on a single CAN-Bus. When using a central power supply unit, the supply voltage
is carried along with CAN-Bus signal transmission. The employed power supply unit’s capacity has to
match the maximum power requirements of the wall panels.
Power Rating Evaluation Example:
The total power rating for a wall station that consists of 1 PWS-C, 1 PWS-4 and 2 PWS-6 can be evaluated
by simply summing up the power consumption of all panels (see individual specifications), i.e.: 1 * 480 mW
+ 1 * 175 mW + 2 * 150 mW = 955 mW
The following illustration shows the connection between an Electro-Voice NetMax N8000 System
Controller and a wall panel using a Dynacord NRS 90257 (PART NO. D121789) 24 volts power supply unit
and a RJ45 adapter board NRS 90226 (PART NO. D121678).
PWS-C NRS 90226
G
GND GND
VCC +24V
CAN L 5
CAN H 4