Question about Module setting switch

2026-01-06 17:29:55 Ask

Dear Support Team,

I recently received the expansion board and am in the process of configuring it. While reviewing the manual, I came across a point that needs clarification regarding the "Module setting switch".

The manual specifies that for 5G / LTE-A M.2 modules (such as RM520N-GL, RM530X, EM06X series), the "C silkscreen switch" should be in the ON position.

This has led me to the following questions:

Ambiguous Switch: The board has two distinct switches labeled "C". Which specific "C" switch does this instruction apply to?
Functionality with Switches OFF: My system appears to function correctly even when all switches are OFF. The Jetson recognizes the modem, and I can successfully execute AT commands. Could you please explain the purpose of this "C" switch setting? What functionality is enabled or disabled when the switch is moved from OFF to ON?

Any clarification you can provide would be greatly appreciated.

Thank you for your time and support.

Best Regards,

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1answers

SpotPearGueste93f8

Answer time:2026-01-08 17:49:01

Different model versions correspond to different DIP switches. Set the C-labeled switch to ON; it can be used for the RM520N-GL / RM530X / EM06X series 5G / LTE-A M.2 modules. For customers using RM520/530, please turn on all the C switches so that the SIM card can be recognized and network connection can be established properly.

The RM500U-CN and RM500Q-GL modules support simultaneous access to two SIM cards, dual SIM single standby. You can switch to enable one of the SIM cards to work using AT commands:

* By default, SIM card 1 is selected. You can use the following commands to check and confirm:
AT CMEE=2
AT QUIMSLOT?
* To switch to SIM card 2, use the following command:
AT QUIMSLOT=2
* To switch back to SIM card 1, use the following command:
AT QUIMSLOT=1
* To check whether the corresponding slot recognizes a SIM card:
AT CPIN?

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Jetson Orin 5G/4G/3G expansion board GNSS GPS RM520N-GL

Price: $240

Part Number： RM520N-GL 5G for Jetson Orin

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