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--- energy-meters:em24 [2018-12-10 16:33] – [1. Introduction and usage] justin_tyers_live_a_c
+++ energy-meters:em24 [2020-08-13 07:30] – cable extension guy_stewart
@@ Line 7: / Line 7: @@
 This document is the manual for the EM24 three phase max 65 A per phase Energy Meter. As shown in the picture above.
-https://www.victronenergy.com/accessories/wired-ac-sensor
+The Energy Meter can be used as a:
-The Energy Meter can be used for four things:
+  - Grid meter, and used as control input for an [[assistants:ess-assistant|ESS System]].
-  - Grid meter, and used as control input for an [[assistants:ess-assistant|ESS System]] (1).
   - Measure the output of a PV Inverter
   - Measure the output of a AC Genset
   - (deprecated) <del>Grid meter, used as control input for a [[system_integration:hub4_grid_parallel|Hub-4 system]]</del>
-(1) In case the meter is used as a grid meter in a single phase installation, it is possible to use the second phase to measure the output of a PV Inverter. Note that this does not work properly, use the ET340 instead. See [[energy-meters:start#faq|Energy Meters FAQ, Q5]] for details.
+The meter is connected to the GX device. There are two options in its wiring:
-The meter is connected to the Color Control GX. There are two options in its wiring:
   - Direct connection, either using the RS485 to USB interface with 1.8m cable length, or the 5.0m cable.
   - Wireless connection via Zigbee
+If you are wondering which Energy Meter you should use, please read the [[energy-meters:start|Energy Meters Start]] page and [[https://www.victronenergy.com/accessories/wired-ac-sensor|Energy Meter Product page]].
 The REL200100000 is the EM24DINAV93XISX from Carlo Gavazzi. Other EM24 models from Carlo Gavazzi can also be used, as the communication is the same. For example the EM24DINAV53DISX, which uses Current Transformers and can therefore work in systems > 63A per phase, has been tested and works. Note that this model is not stocked by Victron Energy, we recommend to purchase it locally.
 ===== 2. AC Wiring and front selector =====
@@ Line 31: / Line 32: @@
 When used to measure a PV Inverter, terminals 1, 4 and 7 should face the PV inverter to ensure correct direction of current and power.
-=== single phase single function diagram: ===
+=== Single phase single function diagram: ===
 Note the jumper between terminals 1 and 4. You do not need this connection if you have the version AV2 of the sensor:
@@ Line 40: / Line 41: @@
 To measure a single phase PV inverter in a 3-phase system, connect all 3 phases to the grid phasing terminals (3, 6 and 9). Now you can chose on which phase you want the PV inverter by connecting the L1 line of the PV inverter to terminal 1, 4 or 7.
-=== single phase dual function diagram: ===
+=== Single phase dual function ===
-In this diagram, a single meter is used to both measure the grid and a single phase PV Inverter.
+If you wish to use a three phase meter in a single phase installation to measure the grid on one input and PV inverter output on another phase, use the ET340 instead. See [[energy-meters:start#faq|Energy Meters FAQ, Q5]] for more details. Do not use the EM24 meter for such system.
-{{:power_meter_1phase+pv_dec2016.png?nolink&300}}
-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.
+If you understand the limitations of this meter in this configuration and wish to proceed anyway, see this diagram - {{ :power_meter_1phase_pv_dec2016.png?linkonly |}}
 === Front selector ===
@@ Line 54: / Line 52: @@
 {{system_integration:em24_front_selector.png?250}}
-===== 3. Connection to CCGX ===
+===== 3. Connection to GX device ===
 ==== Option A: wireless Zigbee connection ====
 === Step 1. ===
-Connect the Zigbee to USB converter to the CCGX using the supplied USB cable. A few seconds after connecting, the active LED should be on and the TX/RX LED should be blinking (the converter takes its power from the CCGX, so the CCGX needs to be switched on as well).
+Connect the Zigbee to USB converter to the GX device using the supplied USB cable. A few seconds after connecting, the active LED should be on and the TX/RX LED should be blinking (the converter takes its power from the GX device, so the GX device needs to be switched on as well).
 {{system_integration:ZigbeeCoordinator.png?200}}
@@ Line 73: / Line 71: @@
 === Step 3. ===
-Make sure only one Zigbee device is powered up right now: the Zigbee to USB converter connected to the CCGX. Power down all others. //If you don't do this, the Zigbee to RS485 converter may be connected permanently to another Zigbee device.//
+Make sure only one Zigbee device is powered up right now: the Zigbee to USB converter connected to the GX device. Power down all others. //If you don't do this, the Zigbee to RS485 converter may be connected permanently to another Zigbee device.//
 === Step 4. ===
 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 with an USB to RS485 cable (see our price list). 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:
-^ RS485 Converter ^ Energy meter ^
+ASS300400100 - Zigbee to RS485 converter partnumber: DRF2619C
-| Yellow    | Terminal 41 |
-| Orange    | Terminal 42 |
+ASS300400200 - Zigbee to USB converter   partnumber: DRF2618A
-| Black     | Terminal 43 |
+'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 GX device 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 ^ Suggested CAT5 extension ^
+| Yellow (Data-   | Terminal 41 | Orange/White |
+| Orange (Data+    | Terminal 42 | Orange |
+| Black (GND)     | Terminal 43 | Brown |
 The red, green and brown wire coming out of the USB to RS485 cable are not used
 {{system_integration:RS485_EM24.png?300}}
+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.
+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’]].
 ===== 4. Configuration =====
-After proper connection and powering up, the meter will be visible on the CCGX in the Settings -> Energy Meters menu:
+After proper connection and powering up, the meter will be visible on the GX device in the Settings -> Energy Meters menu:
 {{ :energy-meter-menu.png?nolink |}}
@@ Line 107: / Line 145: @@
 There are 3 options to connect multiple Energy Meters:
-    - Each wired to a separate RS485-USB converter. Which are then each plugged into a separate USB socket on the CCGX.
+    - Each wired to a separate RS485-USB converter. Which are then each plugged into a separate USB socket on the GX device.
     - 2 meters wired on to one RS485-USB converter. In this case the modbus address of the additional meter needs to be changed, so each is unique. See chapter 6.
     - Wireless connection: the additional meter is connected to an additional Zigbee to RS485 converters. There is then no second Zigbee to USB interface required. It is necessary to change of the modbus address of one of the AC sensors, see chapter 6.
@@ Line 123: / Line 161: @@
 Note that only one extra Energy meter can be added: the systems works only with address 1 (the default) and 2.
+==== Note on Operation ====
 ===== DISQUS =====
 ~~DISQUS~~