Is there a Module 1? I am pretty sure this is what I need, but I thought the 2 power supplies were exactly the same and hot swappable.

This is the replacement power supply for the RS2416RP+ among others. Yes the 2 power supplies on the RS2416RP+ are identical, and I assume the same is true for all synology devices. There is in fact a "PSU 500W-RP module_1" (google it) but that appears to be for some other device and looks totally different from the module_2. By the way the synology website has online chat support and they're actually pretty helpful when you can catch them.

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Synology PSU 500W-RP Module_2

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REDUNDANT PSU MODULE 500W
Applied Models: FS3600, FS3400, FS2017, SA3600, SA3400, SA3200D, UC3200, RS18017xs+, RS18016xs+, RS3621xs+, RS3617xs+, RS3621RPxs, RS3617RPxs, RS2818RP+, RS2418RP+, RS2416RP+, FX2421, RXD1219sas, RX2417sas, RX1217sas, RX1217RP, RX1216sas, RXD1215sas

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A redundant PSU module that provides stable and reliable power, and features a sturdy handle for easy slide-in and removal.

Applied Models: FS3600, FS3400, FS2017, SA3600, SA3400, SA3200D, UC3200, RS18017xs+, RS18016xs+, RS3621xs+, RS3621RPxs, RS3617xs+, RS3617RPxs, RS2818RP+, RS2418RP+, RS2416RP+, FX2421, RX1222sas, RXD1219sas, RX2417sas, RX1217sas, RX1217RP, RX1216sas, and RXD1215sas.

REDUNDANT PSU MODULE 500W

Applied Models: FS3600, FS3400, FS2017, SA3600, SA3400, SA3200D, UC3200, RS18017xs+, RS18016xs+, RS3621xs+, RS3617xs+, RS3621RPxs, RS3617RPxs, RS2818RP+, RS2418RP+, RS2416RP+, FX2421, RXD1219sas, RX2417sas, RX1217sas, RX1217RP, RX1216sas, RXD1215sas

Model
Brand	Synology
Model	PSU 500W-RP Module_2
Type	Accessory

Dimensions & Weight
Dimensions	21.5 x 8.1 x 4.0 cm
Weight	0.77 kg

Additional Information
First Listed on Newegg	September 04, 2025

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Synology PSU 500W-RP Module_2

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Item#: 9SIAJA1KK96742

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Synology PSU 500W-RP Module_2

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