Bender COMTRAXX CP305 Manual page 20

Connection
Notes on the connection
Supply voltage
– Connect the CP305 devices to the supply voltage (terminals A1/+, A2/–).
• DC 24 V: Take the line voltage drop into account if you are using long supply cables for the supply
voltage. Consider the maximum permissible cable lengths for the supply voltage (A1/+, A2/–) (see
"Technical data").
Ethernet
– The currently configured IP address can be read out in the device under
connection is unique for each device and derived from the MAC address when the device is started.
BMS bus
– The connection to the internal BMS bus is established via terminals BMS A/BMS B. Connect the BMS bus.
Use a shielded and twisted cable with a diameter of at least 0.8 mm for the interface line (e.g. CAT6/CAT7
min. AWG23). Connect the shield to earth at one end. Please note that when routing the supply voltage
U , a 4-wire cable (2 x BUS, 2 x U
S
– The first and last device on the BMS bus must be terminated with a terminating resistor. Use the DIP
switch on the bottom of the CP305 to set the terminating resistor for the BMS bus (factory setting: off).
– For more information, see the BMS bus manual (D00276).
Digital inputs/relay outputs
– Use cables with a cross section of at least 0.75 mm
outputs.
– The maximum cable length per connection is 500 m.
20 CP305_D00425_02_M_XXEN/07.2023
) with suitable cross section is required.
s
2 when connecting the digital inputs and the relay
> Info. The IP address for a 1:1