EVCO EPH4DXP1SA - Manual (Page 11)

EVCO S.p.A. c-pro 3 hecto MCSA | User manual ver. 2.0 | Code 144MCSAE204
page 11 of 52
- connect the termination of the CAN port (120
Ω
, 0.5 W); position micro switch 1 in the ON position in order to connect the
CAN port termination (connect the termination of the first and last network element termination).
Note: switches n° 1, 2 and 3 are not used in this application .
CAN BUS
CAN port.
Clamp Meaning
CAN + + signal
CAN - - signal
GND earth
The maximum number of devices that can make up the CAN network (32) depends on the bus load; the bus load
depends on the CANbus communication baud rate and the type of device in the network.
For example: a CAN network can be made up from a programmable controller, four I/O expansions and four user terminals
with 500,000 baud rate.
The maximum length of the CAN port connection cables depends on the CANbus communication baud rate, as follows:
- 1,000 m (3,280 ft) with baud rate of 20,000 baud
- 500 m (49,987.20 cm) with baud rate of 50,000 baud
- 250 m (24,993.60 cm) with baud rate of 125,000 baud
- 50 m (164 ft) with baud rate of 500,000 baud.
Connect the CAN port using a twisted pair cable.
For the settings relative to the CAN port, see chapter 6 “CONFIGURATION”.
DIGITAL OUTPUTS
Digital outputs 1, 2, 3, 4 and 5 (electro-mechanical relays).
Clamp Meaning
CO1/2 common digital outputs 1 and 2
NO1 digital output 1 normally open contact
NO2 digital output 2 normally open contact
NO3 digital output 3 normally open contact
CO3/4/5 common digital output 3/4/5