EVCO c-pro mega - Manual (Page 10)

C-PRO MEGA HARDWARE MANUAL
Page 10
2 Technical features
2.1 Connections
Power supply:
The C-pro MEGA family is available with two different version of power supply :
i. No optoinsulated internal switching 24Vac/dc version
ii. two separeted inputs 12 Vdc + 12 Vdc version. With this version the following ports and outputs are
optoinsulated:
• the analogic output
• the RS-485 serial standard port
• the RS-485 (or RS-232) optional serial port
• the Wide-CAN port
In order to ensure the optoinsulation of these outputs, the controller must be supplied with two dc power
sources preferably electrically insulated one from each other, for example by using an EVCO power supplier
“c-pro AL”. When the controller is powered with a 24 VAC/DC power supply, the over reported outputs and
ports are not opto-insulated. The connection cables length must be 1 m, maximum.
Analogic input connections:
The C-PRO MEGA has two analogic inputs (“universal” named) suitable for the NTC, PTC, Voltage (0-10V,
0-5V), Current (0-20mA, 4-20mA) sensors. The choice is automatically made by means the UNI-PRO
development system or parameters. A Jumper must be removed only for the 0-10V energized input (refer to the
physical layout section and jumpers).
The C-Pro MEGA has six analogic inputs (“configurable” named) suitable for the NTC and Current sensors (0-
20mA, 4-20mA). The choice is automatically made by means the UNI-PRO development system or
parameters. Note that the six inputs are divided into three pairs; each pair must have the same input type.
The active probes may be fed using the VDC terminals (see physical layout) with a stabilized voltage of 12.5V
(total maximum current <=200mA). The length of the analogic input connections cables must be 3 m, at the
most.
Digital input connections :
The C-PRO MEGA has ten low-voltage optoinsulated digital inputs (12-24Vac/dc) . To benefit from the
optoinsulation features, it's recommended to separate the digital input feed from the main power supply of the
controller. If the C-PRO MEGA is fed using the C-PRO AL switching power supply, that can be used to feed
the controller and the digital inputs.
The length of the digital input connections cables must be 3 m, at the most.
Digital output connections :
C-PRO MEGA has 8 digital outputs. There are no groupings of terminals, therefore each individual contact can
be used for the declared specifications.
The length of the digital output connections cables must be 3 m, at the most.
Analogic output connections :
C-PRO MEGA has 4 optoinsulated analogic outputs (voltage or current). Both voltage and current selection
are achieved by using Jumpers (see section wiring layout) and parameters.
The length of the analogic output connections cables must be 3 m, at the most.
User interface connections:
The connection between C-PRO MEGA and the remote user interface has to be done with 4 wire cable (better
if it is two weaved couples).