EK-H4 SENSIRION, EK-H4 Datasheet - Page 2

• Manufacturer Part Number: EK-H4
• Description: EVALUATION KIT, HUMIDITY
• Manufacturer: SENSIRION

Datasheet EK-H4
Specification
www.sensirion.com
Parameter
External Supply
USB Supply
Sensor Supply
Voltage
Temperature Resolution
Humidity Resolution
Measurement interval
Communication USB (via Virtual Com Port (VCP))
Operating
Temperature
Initial configuration set for the default mode (values can be
changed by using the measurement software)
Parameter
Sensor Supply Voltage
Temperature Resolution
Humidity Resolution
Measurement interval
Heater
OTP reload
Used Connection
DC
DC and USB
USB
The EK-H4 may be supplied by DC Power Supply Unit at
9V or USB connection at 5V. Power supply by USB is only
possible if USB driver is installed correctly.
Table 1
1
+
Electrical specification:
Default Configuration
Power Supply
short circuit current
DC Power Supply: Pin Diagram
Input Voltage
Input Voltage Ripple
Supply Current
Input Voltage
Supply Current
Range
Resolution
Accuracy
Output current
0 – 50°C (multiplexer box)
-20 – 70°C (cables, sensor)
SHT7x
SHT2x
Pin
+
-
EK-H4 supplied from
4.75
min
2.1
11
8
8
1
USB (5V)
DC (9V)
DC (9V)
Positive
Voltage
Name
GND
Default value
170 280
170 280
typ
3.0
0.1
40 110
9
5
2
12 Bit
12 Bit
3.0 V
1 s
off
on
off
1440
5.25
max Unit
0.5
3.6
10
14
12
9V Supply
Comment
5
Ground
Version 1.1 – May 2010
1
mA
mA
mA
Bit
Bit
%
V
V
V
V
V
s
Table 2
left – SHT21 and SHT71 sensors on the right of the upper panel.
EK-H4 Circuit Board
EK-H4 Pin Assignment
LED Functions
LED
Power LED
RJ45
Connector
RJ45 Pin
1
3
5
7
8
Pin Assignments: Female RJ45 pin diagram on the
Green LED
Orange LED
Sensor Pin
1
3
1
2
4
Function
LED off denotes low supply
voltage (DC < 8V, USB < 4.75V)
or not connected.
Sensor detected
Measurement is in progress
Name
VSS
SCL
VDD
SDA
1 2 3 4
Micro Controller Unit
connected to MCU
4 sensor channels
Description
Ground
Serial clock
Supply voltage
Serial data
Debug interface
display modes
USB interface
Power supply
Reset button
2 buttons for
Power LED
1 2 3 4
User field
Display
2/7