Differences

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--- energy-meters:em24 [2020-07-28 15:19] – [Option A: wireless Zigbee connection] guy_stewart
+++ energy-meters:em24 [2020-08-13 07:30] – cable extension guy_stewart
@@ Line 14: / Line 14: @@
   - (deprecated) <del>Grid meter, used as control input for a [[system_integration:hub4_grid_parallel|Hub-4 system]]</del>
-The meter is connected to the Color Control GX. There are two options in its wiring:
+The meter is connected to the GX device. 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.
@@ Line 52: / 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 71: / 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. ===
@@ Line 93: / Line 93: @@
 == 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 CCGX ====
-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.
+==== Option B: Wired connection to GX device ====
-^ RS485 Converter ^ Energy meter ^
+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.
-| Yellow    | Terminal 41 |
-| Orange    | Terminal 42 |
+^ RS485 Converter ^ Energy meter ^ Suggested CAT5 extension ^
-| Black     | Terminal 43 |
+| 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 122: / 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.