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energy-meters:et340 [2019-01-21 13:13]
guy_stewart [1. Introduction and usage]
energy-meters:et340 [2020-08-13 07:19] (current)
guy_stewart cable extensions
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 ====== Energy Meter ET340 manual ====== ====== Energy Meter ET340 manual ======
 {{ :energy-meters:energy_meter_et340_right_.png?nolink&200|}} {{ :energy-meters:energy_meter_et340_right_.png?nolink&200|}}
- 
  
  
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   - Direct connection, either using the RS485 to USB interface with 1.8m cable length, or the 5.0m cable.   - Direct connection, either using the RS485 to USB interface with 1.8m cable length, or the 5.0m cable.
   - Wireless connection via Zigbee   - Wireless connection via Zigbee
- 
  
 ===== 2. AC Wiring ===== ===== 2. AC Wiring =====
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 On the CCGX go to the grid meter in the Wired AC sensor settings. Make sure 'Phase type' is set to 'Single phase' and 'PV inverter on phase 2' is enabled. On the CCGX go to the grid meter in the Wired AC sensor settings. Make sure 'Phase type' is set to 'Single phase' and 'PV inverter on phase 2' is enabled.
  
-===== 3. Connection to CCGX ===+===== 3. Connection to GX device ===
  
 ==== Option A: wireless Zigbee connection ==== ==== Option A: wireless Zigbee connection ====
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 Connect the 12V DC power supply to the Zigbee to RS485 converter. When the power is switched on, check the LEDs again. Connect the 12V DC power supply to the Zigbee to RS485 converter. When the power is switched on, check the LEDs again.
  
-==== Option B: Wired connection to CCGX ====+=== note on old and new zigbee converters === 
 +Please note that there is a new zigbee converter available now, that is -not- backwards compatible with the old converters. If you have a non compatible set, please ask your supplier for a correct version.
  
-Connect the Energy Meter to the CCGX using the USB to RS485 cable. The RS485 to USB interface cable between the CCGX and the Energy Meter can be extended up to 100 meters; make sure that the extensions of the Data+ (orange) and Data- (yellow) wires form a twisted pair.+'old' type:  
 + 
 +ASS300400100 - Zigbee to RS485 converter partnumber: DRF2619C 
 + 
 +ASS300400100 - Zigbee to USB converter   partnumber: DRF2618A 
 + 
 +'new' type: 
 + 
 +ASS300420100 - Zigbee to RS485 converter partnumber: DRF2659C 
 + 
 +ASS300420200 - Zigbee to USB converter   partnumber: DRF2658C 
 + 
 + 
 + 
 + 
 +== note on GX firmware versions: == 
 +for the new type Zigbee converters, Venus OS v2.54 is the minimum required software version 
 + 
 +==== Option B: Wired connection to GX device ==== 
 + 
 +Connect the Energy Meter to the GX device using the USB to RS485 cable. The RS485 to USB interface cable between the CCGX and the Energy Meter can be extended up to 100 meters; make sure that the extensions of the Data+ (orange) and Data- (yellow) wires form a twisted pair.
  
 ^ RS485 Converter ^ Energy meter ^ ^ RS485 Converter ^ Energy meter ^
-| Yellow (Data-)  | Terminal  9  | 
 | Orange (Data+)  | Terminal  8  | | Orange (Data+)  | Terminal  8  |
 +| Yellow (Data-)  | Terminal  9  |
 | Black  (GND)    | Terminal 10  | | Black  (GND)    | Terminal 10  |
  
 The red, green and brown wire coming out of the USB to RS485 cable are not used. The red, green and brown wire coming out of the USB to RS485 cable are not used.
 +
 +== Note on cable length extensions and bus termination ==
 +
 +To ensure signal integrity and robust operation, particularly ensure that;
 +
 +Extension cabling complies with the minimum cross-sectional area specifications in the USB to RS485 data sheet.
 +
 +Extension cabling has appropriate shielding and twisted pair cores
 +
 +The original cable attached to the Victron RS485 to USB interface is reduced to a maximum length of 20cm in installations where the total cable length is over 10m or there are installation/site specific interference issues – in this case appropriate/high quality cabling should be used for the entire cable length, rather than only for the extension length.
 +
 +Cabling is installed separated/away from the main DC or AC power cabling.
 +
 +All wiring is properly terminated (including unused wires) and properly isolated from weather/water ingress.
 +
 +RS485 networks are traditionally terminated at both ends with 120Ω terminators. This is not required if the cable length is short and you are using the Victron supplied RS485 to USB lengths, but may be required if they are extended for longer cable runs. The ET340 meter has a built in termination resistor that can be enabled by bridging terminals 7 and 9.
 +
 +For detailed wiring/installation notes and specifications refer to the [[https://www.ftdichip.com/Support/Documents/DataSheets/Cables/DS_USB_RS485_CABLES.pdf|Victron RS485 to USB interface cable ‘Datasheet’]].
 +
  
 ===== 3. Configuration ===== ===== 3. Configuration =====
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 {{ :energy-meters:em340_settings_detail.png?nolink |}} {{ :energy-meters:em340_settings_detail.png?nolink |}}
  
-==== 4. Multiple Energy Meters in one system ====+===== 4. Multiple Energy Meters in one system =====
  
 To connect multiple Energy Meters, wire each meter to a separate RS485-USB converter. Which are then each plugged into a separate USB socket on the CCGX. To connect multiple Energy Meters, wire each meter to a separate RS485-USB converter. Which are then each plugged into a separate USB socket on the CCGX.
  
 Connecting multiple ET340 meters to the same RS485-USB cable is not possible: the ET340 meter has no display and its Modbus address can therefor not be changed. Connecting multiple ET340 meters to the same RS485-USB cable is not possible: the ET340 meter has no display and its Modbus address can therefor not be changed.
 +
 +===== DISQUS =====
 +~~DISQUS~~
  
energy-meters/et340.1548072797.txt.gz · Last modified: 2019-01-21 13:13 by guy_stewart