SMC20 card supplying 4.65 Volts only

RB91

Hi,

I thin I know about those issues, probably you have faults like F31115, F31116,...

There is a possibility to work with additional resistors in the remote sense signals (this is just a workaround and of course no official solution - the official solution would be to use encoders that fit into the SINAMICS portfolio - just to clarify that before :-) ).

Inside the connector at the SMC20 you can add those resistors.

Between Pin1 (P-Encoder) and Pin 14 (P-Sense) you need to have a 5,6kOhm resistor.

Between Pin 2 (M-Encoder) and Pin 16 (M-Sense) you need a 2,7kOhm resistor.

(properties of resistors: 1% tolerance or better, 250mW or higher, 100ppm/TK100 temperature coefficient or better)

Using a high quality encoder cable is necessary.

The result of the resistors in sense signal will be that the SMC sets up its supply up to 10V and the encoder should work.

HTH

Hello All!! Hope you are doing well.

I am also having the 7-30 V Absolute Sin/Cos encoder (AG7Y) and SMC20 card. so as per your information I have connected resistors in the cabinet but the SMC20 card still supplying 4.65 Volts only. Connections have been checked thoroughly, nothing found. Though in some other occasions we have already used that parallel connecting resistors and the SMC card is generating 9.65 Volt for encoder and encoder is working. 

Can you suggest any other way to get the encoder working with SMC20?

Thank You in advance.

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Split from SMC 20 with a 7-30vdc sin/cos encoder.

I think they meant to install the Resistors inside the encoder connector at the SMC20 end, not inside the SMC20.

Are you certain the pin order is correct on the SMC20 side of the connector?  They are a mirror image of the encoder cable connector, so it is very easy to get wrong. Strong bright light and magnifying lens should help.

@Ronnie

RB91

Hi,

I thin I know about those issues, probably you have faults like F31115, F31116,...

There is a possibility to work with additional resistors in the remote sense signals (this is just a workaround and of course no official solution - the official solution would be to use encoders that fit into the SINAMICS portfolio - just to clarify that before :-) ).

Inside the connector at the SMC20 you can add those resistors.

Between Pin1 (P-Encoder) and Pin 14 (P-Sense) you need to have a 5,6kOhm resistor.

Between Pin 2 (M-Encoder) and Pin 16 (M-Sense) you need a 2,7kOhm resistor.

(properties of resistors: 1% tolerance or better, 250mW or higher, 100ppm/TK100 temperature coefficient or better)

Using a high quality encoder cable is necessary.

The result of the resistors in sense signal will be that the SMC sets up its supply up to 10V and the encoder should work.

HTH

Hello All!! Hope you are doing well.

I am also having the 7-30 V Absolute Sin/Cos encoder (AG7Y) and SMC20 card. so as per your information I have connected resistors in the cabinet but the SMC20 card still supplying 4.65 Volts only. Connections have been checked thoroughly, nothing found. Though in some other occasions we have already used that parallel connecting resistors and the SMC card is generating 9.65 Volt for encoder and encoder is working. 

Can you suggest any other way to get the encoder working with SMC20?

Thank You in advance.

------------------------------------------------------------------------------------------
Split from SMC 20 with a 7-30vdc sin/cos encoder.

Yes, I think there were some connections issue out there.

It is working now.

Thanks