EDMI Variant 450 User manual

EDMI Dual Band Variant 450
Communications Hub Variant (CS-21)
Author: EDMI
Approver: Rajan Bhandari
Date: 15/04/2019
Version / Status: 1.2
Document Classification: Public
Distribution and approvals are maintained in Share Point, distribution to the public via EDMI
webpage.
It is the responsibility of the user of this document to verify that it is the most current edition.

EDMI Dual Band Variant 450 Communications Hub Variant
(CS-21)
Copyright © 2019 EDMI Europe Ltd. All rights reserved
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Preface
Privacy information
This document is public information and is shared on EDMI’s webpage.
Revision history
Name
Description of Change
Date
Version
EDMI
First Version
05/03/2019
1.0
EDMI
Several corrections to WAN frequencies across the
document
04/04/2019
1.1
EDMI
Receiver WAN frequencies slightly modified
15/04/2019
1.2
Approval
Name
Position
Signature
Date
Rajan Bhandari
Technical Director

EDMI Dual Band Variant 450 Communications Hub Variant
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Table of Contents
Preface...................................................................................................................................... 2
Privacy information ........................................................................................................... 2
Revision history ................................................................................................................ 2
Approval ........................................................................................................................... 2
1Dual Band EDMI Variant 450 Communications Hub....................................................... 4
1.1 Photograph.............................................................................................................. 4
1.2 Communications Hub Enclosure Engineering Drawing............................................ 5
1.3 Communications Hub Block Diagram....................................................................... 6
1.4 General Specification............................................................................................... 6
1.5 Sub GHz 915-921 MHz Channel............................................................................ 14
1.6 JTM ....................................................................................................................... 14
1.7 Communications Hub Labelling / Artwork Engineering Drawing............................. 14
1.8 Product SKU Naming Convention.......................................................................... 15
1.9 Packaging Drawing (Box) ...................................................................................... 16
1.10 Packaging Drawing (Carton).................................................................................. 17
1.11 Packaging Drawing (Pallet Loading)...................................................................... 18
1.12 Compliance Declaration......................................................................................... 18
2Expected Normal Use and Warnings............................................................................. 19
2.1 Home User ............................................................................................................ 19
2.2 Exclusions ............................................................................................................. 19
2.3 Restrictions............................................................................................................ 19
3Appendix - Noise............................................................................................................. 20
3.1 Noise Limit............................................................................................................. 20
3.2 Noise Calculations................................................................................................. 20
3.3 Spectrum Analyser Guide Settings ........................................................................ 21

EDMI Dual Band Variant 450 Communications Hub Variant
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1 Dual Band EDMI Variant 450 Communications Hub
1.1 Photograph

EDMI Dual Band Variant 450 Communications Hub Variant
(CS-21)
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1.2 Communications Hub Enclosure Engineering Drawing

EDMI Dual Band Variant 450 Communications Hub Variant
(CS-21)
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1.3 Communications Hub Block Diagram
3V9
HAN
2.4 GHz Tran
2 LEDs
User Interface
Quad SPI
16
UART
31.25 MHz TCXO
Host processor
ROM SRAM
SDRAM
Flash
Power Supply Switching Step
Down Converter and last gasp
energy storage
12V DC
3V3
FlexNet
WAN 412
& 454
MHz
2.4 GHz
Zigbee
MEMORY
Flexnet WAN
LRR
HAN
PSU
WAN
RF WAN Transceiver
3V9
Timing Unit
12 MHz
XTAL
32 MHz
XTAL
Radio Transceivers
Memory
Power Supply
Timing Unit
DBCH Only
Hardware Security
Module
32 kHz
XTAL
HAN
868 MHz Transceiver
SPI
868 MHz
Zigbee
55.2 MHz
XTAL
1.4 General Specification
For terms and abbreviations used in this document please see the DCC document: Joint
HAN Radio Testing Methodology (JTM v3.2).
Specification
Description
Dimensions (mm)
Height from bottom face: 92mm
Height from ICHIS datum: 80mm
Depth: 65mm
Width: 131mm
Weight (g)
200g
Environment Protection
IP Rating: IP53

EDMI Dual Band Variant 450 Communications Hub Variant
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Ambient temperature limits: -20°C to 55°C
SM WAN specification
Standard : ETSI EN300 113-1
Frequency Range:
Transmit: 412-414 and 453.0-455.0 MHz
Receive: 453.0-455.0 MHz
TRP: 1W Maximum.

EDMI Dual Band Variant 450 Communications Hub Variant
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HAN Specification
Transceiver
TRP: 2.4GHz
>6.5dBM
TRP: Sub-GHz (excluding 915Mhz)
>11dBm
TRS: 2.4GHz
<-91.5dBm
TRS: Sub GHz( excluding 915Mhz)
<-97dBm
MAPL : (Sub GHz excluding 915Mhz)
>108dB
MAPL : 2.4GHz
>99dB
MAPL : Sub GHz 915Mhz
>40dB
Directivity
Omni
Maximum Output Power
13dBm EIRP for
2.4Ghz
14dBm ERP for Sub
GHz
Note! The CS-21 Sub GHz radio complies with “Receiver
Category 2” per EN 300 220-1 v3.1.1:2017

EDMI Dual Band Variant 450 Communications Hub Variant
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Power Consumption (W)
6W maximum
1W typical

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Visual Indicator
SM WAN_LED (Left)
SM HAN_LED (Right)

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ICHIS Connections
Pins 1, 2: DC input
Pins 3, 4: COM
Pin 5: CH_PR (Communications Hub Present)
Pin 6: MT_PR (Meter Present)

EDMI Dual Band Variant 450 Communications Hub Variant
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Labelling
See section 1.7

EDMI Dual Band Variant 450 Communications Hub Variant
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Packing
See section 1.9 to 1.11

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1.5 Sub GHz 915-921 MHz Channel
MAPL for 915 MHz >40dB. This is not recommended for use.
The design goals of good signal performance in the 868 MHz band, circuit design efficiency
and immunity to high level adjacent cellular band signals resulted in reduced performance
in the 915 MHz band.
The 915 MHz MAPL achieved is significantly below the standard Sub-GHz MAPL
requirements (more than 50 dB below).
1.6 JTM
The Communications Hub has met the MAPL criteria for Sub GHz band (excl. 915MHz) and
2.4 GHz band as defined in JTM v3.2 document
1.7 Communications Hub Labelling / Artwork Engineering Drawing

EDMI Dual Band Variant 450 Communications Hub Variant
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1.8 Product SKU Naming Convention
The product SKU is a 10-character code label printed on top left side front face of the
Communications Hub. The string of characters relates to the following product information:
C S 0 2 1 A –X X –X X
Configuration Identifier –Build Options
Identifier
FW
Certificatio
ns
JTAG
Environment
2
Non-Debug
Production
Disabled
Production
3
Non-Debug
Production
Disabled
UIT-A
4
Debug
Production
Disabled
UIT-A
5
Non-Debug
Production
Disabled
UIT-B
6
Debug
Production
Disabled
UIT-B
D
Debug
ZigBee Test
Enabled
SIT-B
F
Debug
ZigBee Test
Enabled
PIT-A
G
Limited Debug*
Production
Disabled
UIT-A
H
Limited Debug*
Production
Disabled
UIT-B
Build type
A: Commercial Production
S: SIT Comms Hub
T: Test Hub
U: UIT Comms Hub
P: PIT Comms Hub
Customer
0: Arqiva
HW Version
Digit from 0 to 9
FW Version
Digit from 0 to 9
*ITCH device
Model
CS021: CS-21 Communications Hub

EDMI Dual Band Variant 450 Communications Hub Variant
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1.9 Packaging Drawing (Box)

EDMI Dual Band Variant 450 Communications Hub Variant
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1.10 Packaging Drawing (Carton)

EDMI Dual Band Variant 450 Communications Hub Variant
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1.11 Packaging Drawing (Pallet Loading)
1.12 Compliance Declaration
Hereby, EDMI Europe Ltd declares that this Variant 450 DB (CS-21) Communications Hub
equipment isin compliance with the essential requirements andother relevant provisions of Directive
2014/53/EU.

EDMI Dual Band Variant 450 Communications Hub Variant
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2 Expected Normal Use and Warnings
2.1 Home User
This equipment contains no end user serviceable parts and as such end users should not be directly
operating or touching this equipment.
Note! Only qualified Smart Meter Installers should install / remove this equipment.
2.2 Exclusions
The installation, maintenance and decommissioning of the equipment is covered in documentation
available to authorized professional engineering companies.
2.3 Restrictions
This equipment is intended for use in the United Kingdom only, specifically in the northern CSP zone.

EDMI Dual Band Variant 450 Communications Hub Variant
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3 Appendix - Noise
3.1 Noise Limit
Noise limits for hosts as referred to in ICHIS (Intimate Communications Hub Interface
Specification):
WAN
Permissible noise floor rise above thermal noise: ≤7 dB between 453.0 MHz and 455.0
MHz
HAN
Permissible noise floor rise above thermal noise: ≤ 3.5 dB between 2.405 GHz and
2.480 GHz
Permissible noise floor rise above thermal noise: ≤ 7 dB between 863.25 MHz and
872.85 MHz
3.2 Noise Calculations
3.2.1 WAN
From fundamental theory, thermal noise floor in a 20 kHz bandwidth (at room temperature of 296 K)
is: -173.87 + 10*log (20 kHz) = -130.86 dBm
The required minimum carrier to noise ratio of the communication scheme and the noise figure of
the Communications Hub internal design is used to find the minimum WAN TRS.
To maintain the WAN link budget the noise contribution from the ICHIS host has been set to 7 dB
above thermal in the 20 kHz bandwidth. This equates to: -130.86 + 7 dBm = -123.86 dBm
3.2.2 HAN 2.4GHz
From fundamental theory, thermal noise floor in a 2 MHz bandwidth (at room temperature of 296 K)
is: -173.87 + 10*log (2 MHz) dBm = -110.86 dBm
Adding the required minimum carrier to noise ratio of the communication scheme and the noise
figure of the Communications Hub internal design gives a minimum TRS of -91.5 dBm (see General
Specification above).
To maintain the HAN link budget the noise contribution from the ICHIS host has been set to 3.5 dB
above thermal in the 2 MHz bandwidth. This equates to: -110.86 + 3.5 dBm = -107.36 dBm