Schneider Electric TSXDMZ28DR – Mixed 24 VDC Input / Relay Output I/O Block for Modicon TSX Micro

The Schneider Electric TSXDMZ28DR is a compact mixed I/O module designed for the Modicon TSX Micro family, combining 24 VDC digital inputs with relay outputs in one block. From my experience, it’s a straightforward way to expand or replace field I/O on legacy TSX Micro installations without reworking control logic or wiring layouts. You might notice that the 28-point density (typically 16 inputs + 12 relay outputs) hits that sweet spot for small machine cells, conveyors, and packaging equipment where you want dry-contact flexibility on outputs and noise-robust 24 VDC inputs on the same device.

Company’s Order Placement Process and Guarantees

• Warranty: 365 days
• Delivery: 1 week if in stock; no more than one month at the latest
• Payment: 50% advance payment; full payment before delivery
• Express options: FedEx, UPS, DHL

Key Features

• 28-point mixed I/O: Typically 16 x 24 VDC digital inputs plus 12 x relay outputs, ideal for compact panels.
• Relay flexibility: Form A relay outputs handle AC or DC loads, which in many cases simplifies retrofits versus transistor-only cards.
• Noise-tolerant inputs: 24 VDC inputs with common wiring; typically suitable for industrial sensors and limit switches.
• Status at a glance: Channel LEDs help with commissioning and quick fault isolation on the machine.
• Backplane integration: Interfaces to the TSX Micro system bus; no separate communication setup on the front face.
• Field-wiring friendly: Pluggable terminal blocks (in most cases) support clean panel work and faster module swaps.
• Good fit for legacy TSX Micro lines: Keeps existing code and I/O maps intact when replacing like-for-like blocks.

Technical Specifications

One thing I appreciate is how forgiving the relay outputs are when you’ve got mixed field voltages—solenoids on 24 VDC and a small 230 VAC contactor coil can both be handled by the same module. In most cases, adding RC snubbers or diode suppression across inductive loads will dramatically extend relay life.

Related or Supporting Products

• TSXDMZ28DT – Same 28-point layout but with transistor outputs (faster switching; suited for high-speed DC loads).
• TSXDMZ64DR – Higher density mixed I/O; useful when panel space is tight but channel count is growing.
• Spare terminal blocks – Pluggable connector sets for quick swap-outs during maintenance.
• Surge suppressors / RC snubbers – Recommended for inductive loads to protect relay contacts and reduce electrical noise.

A maintenance supervisor in a beverage plant shared that swapping a failed TSX Micro mixed I/O block for TSXDMZ28DR took under 20 minutes, mostly because the wiring didn’t need to change and the addressing stayed consistent. That kind of downtime saving tends to pay for itself quickly on older lines.

Installation & Maintenance

• Panel/cabinet: Install in a clean, dry enclosure meeting industrial control panel standards; allow airflow around modules.
• Wiring: Use appropriately rated copper conductors; segregate high-voltage and low-voltage wiring; tighten terminals to specified torque.
• Grounding: Maintain proper PE grounding and shield terminations to minimize noise on 24 VDC inputs.
• Load protection: Add flyback diodes (DC coils) or RC snubbers (AC coils) on inductive loads to protect relays.
• Commissioning: Verify input logic (sink/source) and update I/O map if replacing different TSXDMZ variants.
• Routine checks: Inspect terminals quarterly for loosening; review relay switching counts in service logs; clean dust with dry air.
• Firmware/config: No module firmware updates typically required; manage I/O configuration from the TSX Micro CPU project.

Quality & Certifications

• CE compliant; UL/CSA certification is commonly available for TSX Micro I/O modules.
• RoHS status is typical for later revisions; exact marking depends on production lot.
• Manufacturer’s warranty applies; our supply includes a 365-day warranty for peace of mind.

If you’re standardizing spares for a TSX Micro installed base, TSXDMZ28DR seems to be a reliable mixed I/O choice. If your application demands faster outputs or high-count channels, the related models above are worth a look.