Adaptive® JUNIOR – Technical and HMI User Guide
REV 1.04
8
J3
1
POWER IN +
Input
Main power positive
48
15
J3
2
POWER IN -
Input
Main power negative
0
15
J4
1
TE OUT +
Output
TE Module/As
48
15
J4
2
TE OUT -
Output
TE Module/Assembly -
0
15
J5
1
Alarm N.O.
Output
Alarm normally open pin
48
2
J5
2
Alarm COM
Output
Alarm common pin
48
2
J5
3
Alarm N.C.
Output
Alarm normally closed pin
48
2
J6
1
RS232 TXD
Output
Serial transmit signal
±12
0.04
J6
2
RS232 RXD
Input
Serial receive signal
±12
0.002
J6
3
RS232 GND
Output
Serial ground
0
J7
-
BOOT / UPDATE USB
-
USB 2.0
5
0.1
J8
1
SSR PWM
Output
Solid state relay PWM
3.3
0.01
J8
2
SSR GND
Output
Solid state relay GND
0
0.01
J9
-
Standard SD card
-
-
-
-
J10
COM USB
-
USB 2.0
5
0.1
J11
-
EXPANSION
-
Expansion Interface
(reserved for future use)
-
-
Table 4. Connector Pin description and electrical parameters
1.5.
Temperature Sensors
It is recommended that adequate thermal flow is maintained to the temperature sensor. Tight thermal coupling
results better temperature control accuracy. The JUNIOR controller is capable to handle K-type thermocouples and
NTC resistor sensors. There are four independent sensor channels available for the user.
1.6.
Fan Interface
There are three independent fan interfaces for the user to access on the board. Each channel can be used to drive a
hot or cold side fan on a thermoelectric assembly. Speed monitoring or control also supported for three and four
wire fans. Signals TACH and PWM are internally pulled up to 3.3V DC and care should be taken selecting a suitable
fan.
1.7.
Alarm Interface
An isolated relay is available for user applications requiring alarm signalling. In case of an alarm condition energises
the relay pin 1 and pin 2 will make connection. Pin 2 and pin 3 breaks the connection on connector J5.
1.8.
RS232 Interface
Serial interface is compatible with EIA/TIA-232 and V.28/V.24 specifications.
1.9.
BOOT / UPDATE USB Interface
The USB 2.0 compatible interface is available through a micro USB connector for future firmware updates. This
interface is not intended to be used for communicating with the board. It only provides a fail-safe field firmware
update facility.
1.10.
Solid State Relay Driver (SSR)
For special applications using AC solid state relays the JUNIOR controller provides a PWM output signal. Care should
be taken to avoid any high voltage risk to the controller board. In SSR control mode the PWM signal is available on
connector J8 and driven by the thermoelectric control parameters. In SSR mode the thermoelectric outputs are
disabled. Most SSR are suitable to use with the controller however the control voltage should allow for a 3V DC
signal (eg. Part number: SSR-40 DA)
