00:00Building automation setup need reliable Modbus control without wasted cash.
00:04Found best deals on top 5 Modbus relay transistor boards for workshop and industrial control.
00:11First, Modbus RTURS485 IO PLC extensible module. Delivers 8, 16, or 32 channels with relay or
00:20transistor outputs, plus digital and analog module mixing. Costs $45.09.
00:27Strong 4.7 rating across 4,820 sales. Flexible IO expansion stands out as best feature.
00:36Worth buying when control panel scale expands and mixed signal handling on single RS485 line is
00:41required. Second, GT3U FX3U series board. Handles 14-80 IO with relay and transistor configs,
00:500-10V analog input, and dual RS485 ports. Supports SFC, FBD, ST Logic with 2,000 R registers.
01:00Costs $41.77. Sits at 4.7 rating with 4,665 orders. Dual RS485 communication is prime feature.
01:12Worth pick for running complex Modbus network routing on tight budget.
01:17Third, FX3U LK3U relay transistor board. Runs 200 kHz high-speed pulses, 0-10V analog inputs,
01:27and factory switchable PT100 temperature support. Costs $54.15.
01:34Earns 4.9 rating over 4,526 sales. 200 kHz pulse output shines brightest.
01:42By this one stepper control, servo positioning, or precision thermal tracking must work inside one
01:48controller. Fourth, WS1616S expansion board. Provides 16 inputs and 16 outputs via non-isolated
01:57RS485 Modbus RTU. Costs $40.22. Holds 4.8 rating with 4,374 boards sold.
02:08Balanced 16 inches 16 out density is best feature. Ideal pick for straightforward input-output
02:15replication without configuration headache at rock-bottom cost.
02:19Fifth, FX3U analog input controller. Features for dedicated 0-20 mA analog inputs
02:27paired with standard relay or transistor outputs over RS485 Modbus. Costs $43.75.
02:35Holds rare 5.0 perfect rating across 4,214 units. Native 0-20 mA current loop sensing is key win.
02:45Pick this when reading industrial pressure or flow transmitters directly without buying extra signal
02:50conditioner hardware. Links to all boards listed below in description.
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