ION9000 with RD192 display

[Miyai]

Hello,

I'd like some advice on the following two points:

AA)

Customer wants to connect and operate two RD192 displays with an ION9000.

Is it possible to connect displays to the two locations below and operate them in parallel?

BB)

What is the maximum length of an Ethernet cable for a remote DisplayPort?

I think there may be a length restriction in order to supply power to the RD192 that is connected.

(Customer want to connect 90m of CAT5 cable.)

Regards,

Miyai

[Mehran_Mehrnia · Accepted solution]

Hi @Miyai 

AA) Only one Remote Display (RD192) can be connected to the ION9000 meter, either through the RD port using a LAN cable or via the 4-pin socket using a back-to-back (B2B) cable with one end as a 4-pin socket  and the other as an RJ45 connector .

BB) Standard Ethernet itself supports cable lengths up to 100 meters using CAT5 or better. However supplying power over Ethernet (PoE) to the RD192 display can be affected by cable length and quality.

The RD192 hardware kit includes a 3-meter Ethernet cable for initial setup or short-distance use.

Best Regards,

-Mehran

L3 Expert Advanced metering

[Miyai]

Hi @Mehran_Mehrnia 

I would like add advice.
I told customer that since PoE is involved, I would like the Cat5 cable to be about 3m long.
However, we have been asked again about our thoughts on applying DC24V to the RD192.

If 24Vdc is applied to the RD192, will the output from the ION9000 remote display terminal be communication rather than PoE?(Power is supplied from 24V DC.)

If it becomes a communication circuit instead of PoE, we believe that the restrictions on cable length will be relaxed.

Best regards,

Miyai

[Mehran_Mehrnia · Accepted solution]

Hi @Miyai 

The display can be powered by auxiliary control power, which can be useful for troubleshooting for example, if the display does not turn on.

However, it is not recommended to use both PoE (port power) and auxiliary power simultaneously. If the RD192 is installed far from the meter, it is advisable to ensure the distance does not exceed the reliable range for PoE, as voltage drop over long Ethernet cable runs can affect performance.

Best Regards,

-Mehran

L3 Expert Advanced metering

[Miyai]

Hi @Mehran_Mehrnia 

Thanks for advice.

I will explain to customer .

Best regards,

Miyai

[Miyai]

Hi @Mehran_Mehrnia 

Do you know whether the pinout of the POE port of the ION9000 and RD192 is model A or B?

Customer wants to modify the POE cable to verify that the display will work with a 24V DC power supply and POE communication signal.
Therefore, customers want to know the pinout of the POE.
(They want to disconnect the voltage circuit from the POE.)

In this configuration, responsibility lies with the customer.

Can you share the pinout information?

Best regards,

Miyai

[Mehran_Mehrnia]

Hi @Miyai 

From the ION9000 user guide -> RD192 Display section, the ION9000 meter uses standard IEEE 802.3af PoE, however, it does not explicitly state whether the RD192 uses Mode A or Mode B.

Mode A: Power over the data pairs (pins 1, 2 and 3, 6).
Mode B: Power over the spare pairs (pins 4, 5 and 7, 8).

However, since the back-to-back (B2B) cable has one end with a 4-pin socket and the other with an RJ45 connector, it is likely using Mode A, which requires only four signal lines.

Pin	Function
1	Data + / Power +
2	Data - / Power +
3	Data + / Power -
6	Data - / Power -
4, 5, 7, 8	Not used for power

Best Regards,

-Mehran

L3 Expert Advanced metering

[Charles_Murison]

Hello @Miyai and @Mehran_Mehrnia 

The RD192 is able to support Mode A or Mode B with RJ45 port.

Regards,

Charles

[Miyai]

Hello, @Charles_Murison , @Mehran_Mehrnia 

Thank you for your advice.

I have prepared a POE checker.

In conclusion, it was confirmed to be Mode A.

power pins were 1, 2, 3, and 6.

Best regards,

Miyai