Perma Pure eCOOL 5000 Series - Manual (Page 12)

Section G: Boards 11
G: B
OARDS
Control Board
The control board is the motherboard for the eCOOL system. The control board
handles the majority of the functions for the cooler module. It contains the micro
processor that controls all of the functional areas of the design, as well as the
temperature measurement of the controlled vapor flow as well as the Pulse Width
Modulation (PWM) control of the Peltier elements to cool the vapor.
Inputs:
4 Thermocouple Inputs (Channel 1, Channel 2, and two Spare)
12-24VDC Power Inputs
12-24VDC Control Board Power Inputs
1 Analog Input
Input/Outputs:
Relay Board 1 Input/Output
Relay Board 2 Input/Output
LAN Card Input/Output
Accessory Board Input/Output
Isolator Board Input/Output
Outputs:
4 Analog Outputs (scaled 0 to 4.5VDC matching the Thermocouple Inputs)
Peltier Power Outputs (spade terminals)
DC Fan Power Output 1
DC Fan Power Output 2
Power Connections
The board is powered in two locations by a DC power supply rated to handle the
current required by the Peltier elements present in the system. The Peltier power is
supplied via the E1 and E2 lugs, where E2 is connected to the positive terminal and
E1 is connected to ground. The rest of the board is powered by the JP1 power
connector. This connector has two terminals on it with number 1 connected to the
positive DC voltage coming from the power supply and number 2 connected to
ground. The wires that are used to connect to the power supply should be
individually routed back to the power supply to minimize the noise created by the
peltiers.
Fuses
The fuses are labeled as F1, F2, F3. They are self-resetting fuses. If one of the
fuses trips, disconnect all power, identify and correct the problem that caused the