Which Huawei switch models support Huawei PDC-650WA-BE 650W DC PoE module?

In Huawei Switch, the display poe device command displays information about the device supporting Power over Ethernet (PoE). Before using the PoE function, run the display poe device command to check whether the device supports the PoE function. If the command output is displayed, the device supports the PoE function.

Huawei S5700-28P-PWR-LI only can be equipped with AC 110V-220V power supply.Only Huawei S5720-28X-PWR-SI, S5720-52X-PWR-SI, S5720-36C-PWR-EI, S5720-56C-PWR-EI can support Huawei PDC-650WA-BE (650W DC PoE module)

No, Huawei S5700 series PoE switch only has AC power supply.

In fact, Huawei S6720 Switch has with 600W AC power supply, 350W DC power supply.
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When using Huawei power supply units, Huawei fixed switches supports 110 V AC input power. The power consumption of most powered devices (PDs) is 4 W to 5 W; therefore, 250 W and 500 W power supply units can provide sufficient PoE power for PDs.
NOTE:
All fixed PoE switches except the S2700-9TP-PWR-EI, S2750-20TP-PWR-EI-AC, S2750-28TP-PWR-EI-AC, S2751-28TP-PWR-EI-AC, S5700-10P-PWR-LI-AC, S5700-28P-PWR-LI-AC, S5700-28TP-PWR-LI-AC, S5700S-28P-PWR-LI-AC, S5701-28TP-PWR-LI-AC, S5700-52P-PWR-LI-AC, S5700-28X-PWR-LI-AC, and S5700-52X-PWR-LI-AC support double PoE power supply units.

Fixed Switches Product Series Model AC and DC Power Module Mixing S3700/S5700/S6700 S3700-26C-HI Supported S5710-28C-EI Supported S5710-52C-EI Supported S5700-28C-HI Supported S5700-28C-HI-24S Supported S5700-EI (non-PoE) Supported in V200R005 S5700-SI (non-PoE) Supported in V200R005 S6700 Supported in V200R005 S5710-HI AC and DC power modules cannot be used together, but 350 W and 1150 W AC power modules can be used in one switch. S5720-HI Supported Modular Switches · When a switch does not use a PoE power module:
AC and DC power modules cannot be used together in the same type of power slots. Power modules with different power values cannot be used together either.
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· When a switch uses a PoE power module:
Version PoE Power Module System Power Module V200R005C00 and earlier versions AC AC DC power module not supported - V200R006C00 and later versions AC AC DC DC AC DC ·
AC and DC power modules cannot be installed in the slots of the same type (system or PoE) in the same switch, and the power modules of different power values cannot be used in the same switch.
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The S2700/3700/5700/6700 can use only the certificated optical modules. If an uncertificated
optical module is used, an error may occur and Huawei is not responsible for it. Huawei Switch Price Buy Huawei Quidway Switches Huanetwork com

did you check to see if the SFP is registering on the s3700 switch -- check by running display device. Try it!
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Fixed optical interfaces on the S5700EI, S5700SI, S5710LI, and S5700HI support 100M optical modules, while interfaces on extended front cards do not support 100M optical modules.

In the S5700LI series, only the S5700-28X-LI-24S-AC, S5701-28X-LI-24S-AC, S5700-52XLI- 48CS-AC, and S5700-28X-LI-24S-DC support 100M optical modules on their GE interfaces.

The S5710EI series switches support 100M optical modules only on their combo interfaces.

When a GE optical interface of the S5700 works at 1000 Mbit/s, it can only use a 1000M optical module. When the interface works at 100 Mbit/s, it can use either a 100M optical module or a 1000M optical module.
Hope can help you!
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Check if the switch uses active or passive PoE and the volts it pushes out

Active(PINS)1 2 3 4 5 6 7 8RX/DC+ RX/DC+ TX/DC- n/a n/a TX/DC-
Passive(PINS)1 2 3 4 5 6 7 8RX RX TX DC+ DC+ TX DC- DC-
Cat 5 cable9V < 30m cable length12V < 60m cable length
Max Ethernet cable length is 100m