STBDDI3420K Digital Input Kit – Modicon STB 4-Channel 24V DC | Schneider

Product Overview

• STBDDI3420K – a complete digital input kit from Schneider Electric.
• Part of the Modicon STB distributed I/O solution.
• Includes base, connectors, and the DDI3420 module.
• Designed for reliable 24V DC input sensing in harsh environments.

Kit Contents

• STBDDI3420 – 4‑channel digital input module.
• STBXBA1000 – I/O base for mounting.
• STBXTS1100 – screw‑type 6‑terminal connector.
• STBXTS2100 – spring‑clamp 6‑terminal connector.

Key Features

• 4 digital inputs – 24V DC, sink/source configurable.
• Flexible filtering – 0.5 ms to 16 ms, selectable.
• Fast response – 0.925 ms OFF‑ON, 1.35 ms ON‑OFF.
• Built‑in protection – reverse polarity, resistor‑limited, and PDM fuse.
• Hot swapping – replace modules without powering down (with standard NIM).
• High isolation – 1500 V between channels and logic bus.
• Sensor supply – 100 mA per channel for external devices.
• Wide temperature range – -25…70 °C operation.

Technical Specifications

• Brand – Schneider Electric
• Model – STBDDI3420K
• Series – Modicon STB
• Type – Digital input kit (standard)
• Number of inputs – 4
• Nominal voltage – 24 V DC
• Input range (state 1) – 11…30 V
• Input range (state 0) – -3…5 V
• Absolute max voltage – 56 V for 1.3 ms
• Input current – 8 mA typical
• Guaranteed thresholds – ≥2.5 mA (state 1), ≤1.2 mA (state 0)
• Logic type – Positive or negative (sink/source)
• Response time – 0.925 ms (OFF‑ON), 1.35 ms (ON‑OFF) ±0.5 ms
• Filtering options – 0.5, 1, 2, 4, 8, 16 ms (±0.25 ms)
• Sensor supply – 100 mA per channel
• Protection – Reverse polarity, resistor‑limited input, 10 A PDM fuse
• Insulation – 1500 V for 1 minute (channel‑bus)
• Hot swap – Yes (with standard NIM)
• Current consumption – 45 mA at 5 V DC (logic bus)
• Status LEDs – 1 green (RDY), 4 green (IN1‑IN4), 1 red (ERR)
• Dimensions (W×H×D) – 125 × 18.4 × 65.1 mm
• Weight – 0.111 kg

Environmental & Certifications

• Operating temp – -25…70 °C (no derating)
• Storage temp – -40…85 °C
• Humidity – 95 % at 60 °C (non‑condensing)
• IP rating – IP20 (per IEC 61131‑2)
• Pollution degree – 2
• Altitude – ≤2000 m
• Vibration – 3 gn (58‑150 Hz) on 35×7.5 mm rail; 5 gn on 35×15 mm rail; ±0.35 mm (10‑58 Hz)
• Shock – 30 gn for 11 ms
• Standards – IEC 61131‑2 Type 1
• Certifications – CSA, FM Class 1 Div 2, UL, CE

Compatibility

• Base – STBXBA1000 (included)
• Power distribution – STBPDT3100 or STBPDT3105
• NIM – Works with standard STB NIM modules for hot swap

Installation & Maintenance

• Mounting – Snap onto DIN rail (35 mm).
• Wiring – Use either screw or spring connectors (both included).
• Filter setting – Adjust via software to match sensor speed.
• Replacement – Hot swap supported; no need to power off.

Packaging & Delivery

• Includes – Module, base, screw connector, spring connector.
• Warranty – 12 months against defects.
• Shipping – 12‑24 hours via FedEx, UPS, or DHL.

Expert Review

• Manager’s Insight: “The STBDDI3420K kit offers exceptional value for distributed I/O. The dual connector types and wide filtering range make it adaptable to nearly any sensor. Its rugged build and hot‑swap capability reduce downtime significantly.”

Applications

• Ideal for – Factory automation, conveyor systems, packaging machines, and material handling.
• Works with – Sensors, pushbuttons, limit switches, and proximity detectors.
• Best used in – Distributed control panels where space is limited.

Comparison

• STBDDI3420K vs. STBDDI3410 – STBDDI3420K includes both screw and spring connectors, offers wider temp range (-25…70°C vs. 0…55°C).
• STBDDI3420K vs. TM5SDI4D – STB kit is more rugged (-25°C) and supports hot swap; TM5 is for Modicon TM5 backplane.
• STBDDI3420K vs. AB 1734‑IB8 – STB kit provides sensor supply (100 mA/ch) and more filtering options.
• Compare details: Schneider STB Series

FAQ

• Q: What input voltages are accepted for state 1?
  A: 11…30 V DC.
• Q: Can I use this with a 12V sensor?
  A: Yes, if the sensor provides ≥11 V at state 1.
• Q: How do I set the input filter?
  A: Via the configuration software (e.g., SoMachine, EcoStruxure).
• Q: Is the module protected against reverse wiring?
  A: Yes, reverse polarity protection is built‑in.
• Q: Can I replace the module while the system is running?
  A: Yes, hot swap is supported with a standard NIM.
• Q: What is the maximum sensor current per channel?
  A: 100 mA.
• Q: Does the kit include both connector types?
  A: Yes, both screw (STBXTS1100) and spring (STBXTS2100) are included.
• Q: What is the warranty period?
  A: 12 months from purchase.
• Q: How fast is delivery?
  A: We ship within 12‑24 hours via FedEx, UPS, or DHL.

Selection Guide

• Choose STBDDI3420K if:
  • You need 4 rugged 24V DC inputs for harsh environments.
  • You want both screw and spring connectors in one kit.
  • You require hot‑swap capability and flexible filtering.
• Consider alternatives if:
  • You need more than 4 inputs – look at STBDDIxxxx modules with 8 or 16 channels.
  • You need AC inputs – this kit is DC only.
  • You require higher isolation – check STB isolated input modules.
• Pro tip: For field wiring flexibility, choose the spring connector – it’s faster to install and more vibration‑resistant.

Contact Information:
Email: sales@powergearx.com
Phone/WhatsApp: +86 18030005825

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