TSXDMZ28AR | Schneider Electric Discrete I/O Module, 28-Channel

Why the TSXDMZ28AR Belongs in Your Spares Strategy

Downtime on a Modicon TSX Micro line rarely announces itself. A single failed I/O base can halt a packaging cell, a conveyor interlock, or a batch process within minutes. The Schneider Electric TSXDMZ28AR is a discrete relay I/O base built for the TSX Micro automation platform, and keeping one on the shelf is one of the most cost-effective insurance policies a maintenance team can hold.

This module combines 16 discrete inputs and 12 relay outputs in a single DIN rail unit. That density means fewer components, less panel wiring, and lower installed cost per point.

Technical Specifications That Drive Value

• Channels: 28 total — 16 inputs and 12 relay outputs (NO contacts)
• Input voltage: 100...120 V AC, 47...63 Hz
• Input current: 11 mA at 50 Hz, 13 mA at 60 Hz
• Input thresholds: >= 74 V at state 1; < 20 V at state 0
• Guaranteed current: = 6 mA at state 1
• Response time: < 10 ms output; 11...18 ms input (state 0 to 1, 50 Hz)
• Output voltage limits: 19…264 V AC; 10...34 V DC
• Isolation: 1500 V for 1 s; insulation resistance >= 10 mOhm
• Power dissipation: 5.6 W; current consumption 125 mA
• Thermal current: [Ith] 3 A conventional free air
• Operating temperature: -25°C to +70°C; storage -40°C to +85°C
• Humidity: 5% to 95% non-condensing
• Mounting: DIN rail; 16 screw terminal block connections
• Certifications: CE, UL, CSA
• Weight: 1.1 lb (0.5 kg)

Each specification carries a cost implication. The 3 A thermal current rating lets one base drive multiple loads without adding external relays. The 1500 V isolation protects downstream logic from field transients, reducing repair spend. And the wide -25°C to +70°C operating window means the same part number works in unheated cabinets and hot process areas alike — one spare covers many sites.

Where This Module Earns Its Keep

Material handling and conveyors. The 12 relay outputs switch motor starters, diverters, and indicator lamps directly. With 19…264 V AC output limits, you can drive common control voltages without interposing relays, cutting bill-of-materials cost.

Water and wastewater panels. Two-wire proximity sensors connect straight to the inputs, and the 47...63 Hz input frequency range suits standard AC sensing circuits. Fewer signal conditioners means fewer failure points and lower lifecycle cost.

Retrofit and upgrade projects. When an older TSX Micro rack needs a replacement base, the TSXDMZ28AR drops onto existing DIN rail with screw terminal wiring. Fast swap-out keeps the mean time to repair low.

Installation and Commissioning Notes

Mount the unit on DIN rail inside a panel that respects the 5% to 95% non-condensing humidity range. Terminate field wiring at the 16 screw terminal block, keeping AC input circuits separated from logic wiring to preserve the 1500 V isolation barrier. Verify input voltage stays within the 100...120 V AC band before energizing; state 0 is guaranteed below 20 V and state 1 above 74 V, so marginal signals cause intermittent faults.

Allow airflow around the module. At 5.6 W dissipation, heat builds in dense enclosures and shortens component life — a hidden cost that shows up as repeat failures.

Maintenance That Protects Your Budget

Inspect terminal screws and relay contacts periodically as part of your standard PM schedule. Relay outputs are the wear point on any discrete base; heavy inductive loads accelerate contact degradation. Log switching cycles on high-duty outputs so you can plan replacement before a line stops.

Keep spare units in a controlled environment within the -40°C to +85°C storage range. A properly stored spare avoids expedited freight premiums and emergency sourcing markups.

Compatibility and Integration

The TSXDMZ28AR belongs to the Modicon TSX Micro automation platform and conforms to IEC 1131-2 Type 2 standards. It integrates with TSX Micro PLC racks and communicates through the backplane of that platform. If your architecture spans other networks, confirm gateway and cabling requirements with your supplier before ordering.

Buying Checklist

Before you commit, verify: the rack series accepts a discrete relay I/O base; field devices match the 100...120 V AC input range; output loads fall within the 19…264 V AC or 10...34 V DC limits; and panel space allows DIN rail mounting with clearance. Please verify current lifecycle status and availability with SpareTech Plc before ordering.

SpareTech Plc supplies genuine parts, fast shipping, and expert technical selection support. Contact SpareTech Plc today for pricing and availability.