HETRONIC CSM2400FH User manual

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Module Name
Date
By
Date
By
CSM2400FH
Description
2400 MHz RF Module with Frequency Hopping
Remarks
Item Number
CSM2400FH
User Manual

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Description: 2400MHz RF Module with Frequency Hopping 2 of 10
1. TABLE OF CONTENTS
1. TABLE OF CONTENTS............................................................................................................................. 2
2. GENERAL DESCRIPTION........................................................................................................................ 3
3. FCC COMPLIANCE NOTIFICATIONS.................................................................................................... 4
4. SETUP AND ADJUSTMENT PROCEDURE............................................................................................ 6
5. APPROVED ANTENNA LIST……………...…………………………………………………………….6
6. LABEL PLACEMENT................................................................................................................................ 6
7. MICROCONTROLLER INTERFACE ....................................................................................................... 7
8. TECHNICAL SPECIFICATIONS .............................................................................................................. 8
TABLE OF FIGURES
Figure 1: Label placement ................................................................................................................................ 5
Figure 2: CSM FH Pin Layout.......................................................................................................................... 7

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2. GENERAL DESCRIPTION
The CSM2400 module from Hetronic is a Frequency Hopping Spread Spectrum transmitter. It transmits
data in the 2.4GHz spectrum in a transparent manner. To ensure a reliable connection, the radio link is fully
redundant, with two distinct radios. Once the modules are paired, they will send data through a pseudo
random channel sequence utilizing packet-based encryption.
2.1.2 Band Plan
•Channel spacing: 405 kHz (precise 405,456.543)
•204 channels possible
•To protect band borders, only 200 channels are in use (#1 … #200)
Start Frequency (Hz):
902175000
Middle Frequency (Hz):
915000000
Stop Frequency (Hz):
927825000

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3. FCC COMPLIANCE NOTIFICATIONS
FCC Part 15 Notice
“This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1)
This device may not cause harmful interference, and (2) this device must
accept any interference received, including interference that may cause undesired operation.”
ISED RSS-Gen Notice
“This device complies with Industry Canada’s licence-exempt RSSs. Operation is subject to the following two
conditions:
(1) This device may not cause interference; and
(2) This device must accept any interference, including interference that may cause undesired operation of the
device.”
“Le présent appareil est conforme aux CNR d’Industrie Canada applicables aux appareils
radio exempts de licence. L’exploitation est autorisée aux deux conditions suivantes :
1) l’appareil ne doit pas produire de brouillage;
2) l’appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d’en
compromettre le fonctionnement.”
For Canadian User
CAN ICES-3 (B)/NMB-3(B)”
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part
15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and
used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation.
If this equipment does cause harmful interference to radio or television reception, which
can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference
by one of the following measures:
•Reorient or relocate the receiving antenna.
•Increase the separation between the equipment and receiver.
•Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
•Consult the dealer or an experienced radio/TV technician for help.
“Changes or modifications not expressly approved by the party responsible for
compliance could void the user's authority to operate the equipment”
WARNING: The OEM must ensure that FCC labeling requirements are met. This includes a clearly visible
label on the outside of the OEM enclosure specifying the appropriate Hetronic FCC identifier for
this product below.
“Contains FCC ID: LW9-CSM2400FH”
“Contains IC: 2119B-CSM2400FH”

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RF Exposure
The Hetronic CSM2400FH meets the RF exposure requirement of low power devices under portable operation. This
device should be operated with a minimum distance of 20mm (2 cm) between the antenna and your body. Do not
touch or move antenna while the unit is transmitting or receiving.
Le Hetronic CSM2400FH répond aux exigences d'exposition aux RF des appareils à faible puissance en
fonctionnement portable. Cet appareil doit être utilisé avec une distance minimale de 20 mm (2 cm) entre
l'antenne et votre corps. Ne touchez pas et ne déplacez pas l'antenne pendant que l'unité émet ou reçoit.
NOTE: FCC/IC warnings are to be incorporated into the manuals as provided to the end user.

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4. Setup and Adjustment Procedure
The CSM2400FH is factory tested and setup during the approved end control process. Any settings and adjustments
are preformed by factory trained personnel. No final adjustments are required by the end user.
5. Approved Antenna List
Table 2 – Approved Antenna List
6. Label Placement
The actual labeled and assembled unit will look similar to the one pictured below:
Figure 1
Item
Part Number
Mgf.
Type
Gain (dB)
1
56506605
Hetronic
Omnidirectional
Unity
2
ANT-2450-3-0
Doodle Labs
Omnidirectional
3 bBi

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2. Microcontroller Interface
Pin Layout
CSM FH uses a pin layout compatible with legacy Hetronic radio modules. This layout allows the CSM FH to be used
in devices that accept direct installation of the legacy module. Please note, however, that the pins are not utilized the
same way as the legacy radios, and software modification of devices is required to make use of the CSM FH radio
module.
Figure 2 - CSM FH Pin Layout
Pin Description
Pin Label
Type
FH Pin Description
GND
S
Negative Supply Input, 0 V DC (Ground)
BATT+
S
Positive Supply Input, 2.9-5.5 V DC
TXS
IPU
Not Used1
RXS
IPU
Not Used1
AF
O
Not Used3
CLK
IPU
Not Used1
DAT
I
Not Used1
LE
I
Not Used1
LD
O
Not Used2
RSSI
O
Not Used3
DO
O
UART command data out (CSM -> Host)
DI
IPU
UART command data in (Host -> CSM)
(S = Supply, I = Input, O = Output, B = Bi-Directional, PU = Pullup, PD = Pulldown)
Table 1 - CSM FH Pin Descriptions
Notes:
1 – These unused pins are pulled to BATT+ internally.
2 – The LD pin is driven LOW under CSM FH operation.
3 – The RSSI and AF pins are used for diagnostic output for the FHSS sub-system.

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3. TECHNICAL SPECIFICATION
POWER
VALUE
Supply Voltage
2.8 to 4.2 VDC
Transmit mode Supply Current
90 mA
Vcc= 4V, 20 bBm output,
50 ohm load.
Receiver Mode
40 mA
Vcc= 4V
PROTOCOL
Data Rate
≥25 kbps
Buffered
≥1024 Bytes
PTP
Yes
RF
Diversity
Full
Encryption
Yes
RSSI and/or LQI available to all
nodes
Yes
Channels available
200
Proprietary communications
protocol
Yes
Circular Antenna Polarization
(external), PCB RF connector only
RHCP, RF connector SMB type
Adjustable RF power
≤
20 dBm
Class 1 receiver blocking
Complies to ETSI 300 328 V2.2.1
(2019-04), clause:
Page 26: 4.3.1.12 Receiver
Blocking
Page 27: 4.3.1.12.4.2 Receiver
Category 1
Receive Noise Figure
TI LNA: 4,8 dB incl. antenna
switch
Robust front-end filtering
Yes
Frequency Hopping
–
zero
application configuration
Yes
OPERATING ENVIRONMENT
Operating Temperature
-40
°
to +85
°
C

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Storage Temperature
-40
°
to +105
°
C
Operating Humidity
20% to 70%, non-condensing
Storage Humidity
95%, non-condensing
MECHANICAL
PCB Material
FR-4 (Prepreg 7628 AT05 47%
Resin)
Connections
•Power
•Ground, RF connector(s)
for external antennas,
SMB
•Data
•Config, Pairing