STBDDI3610K: A Complete Digital Input Kit for Modicon STB
Downtime often starts with a failed I/O point. The STBDDI3610K from Schneider Electric solves that problem by delivering a ready-to-install digital input kit for the Modicon STB distributed I/O solution. This kit bundles the STBDDI3610 module, an STBXBA1000 base, and two connector options, so you can replace a faulty input slice without hunting for separate parts. That packaging directly supports a fast replacement and upgrade strategy.
What Is Included in the Kit
The STBDDI3610K is a standard digital input kit. Its kit composition includes the STBDDI3610 module, an STBXTS2100 6-terminal spring clamp connector, an STBXTS1100 6-terminal screw type connector, and an STBXBA1000 base. You receive six discrete inputs rated at 24 V DC. The input logic accepts positive or negative signals, which gives you flexibility when matching existing field wiring conventions.
Key Technical Parameters
| Specification | Value |
|---|---|
| Range of product | Modicon STB distributed I/O solution |
| Product or component type | Standard digital input kit |
| Discrete input number | 6 |
| Discrete input voltage | 24 V DC |
| Input voltage limits | 15…30 V at state 1; -3…5 V at state 0 |
| Permissible voltage | 30 V |
| Absolute maximum voltage | 56 V for 1.3 ms |
| Discrete input current | 4.5 mA |
| Current state 0 guaranteed | <= 0.5 mA |
| Current state 1 guaranteed | >= 2.5 mA |
| Response time | 1.21 ms off-to-on; 1.74 ms on-to-off |
| Input filtering | 1 ms |
| Insulation | 1500 V between channels and logic bus for 1 minute |
| Cold swapping | Yes |
| Hot swapping | Yes for standard NIMs |
| Rated supply voltage | 24 V DC |
| Current consumption | 55 mA at 5 V DC for logic bus |
| Protection type | Integrated fuse on PDM, time lag 10 A; resistor-limited input; reverse polarity protection |
| Status LED | 1 green module status (RDY); 1 green per channel (IN1 to IN6); 1 red module error (ERR) |
| Dimensions | 125 mm width, 18.4 mm height, 65.1 mm depth |
| Net weight | 0.112 kg |
| Operating temperature | -25…70 °C without derating |
| Storage temperature | -40…85 °C without derating |
| Relative humidity | 95 % at 60 °C without condensation |
| IP degree of protection | IP20 conforming to EN 61131-2 class 1 |
| Standards | EN/IEC 61131-2 type 1 |
| Product certifications | FM Class 1 Division 2, UL, CSA |
| Marking | CE |
| Overvoltage category | II |
| Pollution degree | 2 conforming to IEC 60664-1 |
| Operating altitude | <= 2000 m |
Why These Specs Matter on the Plant Floor
The 4.5 mA input current and defined state thresholds (state 0 <= 0.5 mA, state 1 >= 2.5 mA) help you verify that field devices drive the input reliably. The 1 ms input filtering plus response times of 1.21 ms off-to-on and 1.74 ms on-to-off suit control tasks that need consistent, repeatable signal capture. Reverse polarity protection and a resistor-limited input reduce the chance of damage from wiring mistakes during maintenance. The 1500 V insulation between channels and the logic bus for one minute adds a layer of separation that protects the bus side.
Replacement and Upgrade Fit
Because the kit includes the base and both connector styles, you can swap a failed input slice quickly. Cold swapping is supported, and hot swapping is supported for standard NIMs. That means you can restore an input point without a full rack shutdown in supported configurations. The STBDDI3610K also carries FM Class 1 Division 2, UL, and CSA certifications, so it fits installations that already rely on those approvals. The IP20 rating and -25…70 °C operating range without derating cover most cabinet environments.
Installation Notes
Mount the STBXBA1000 base on a 35 x 7.5 mm or 35 x 15 mm symmetrical DIN rail. The vibration resistance is 3 gn at 58…150 Hz on 35 x 7.5 mm rail and 5 gn at 58…150 Hz on 35 x 15 mm rail, with +/-0.35 mm at 10…58 Hz. Use the STBXTS2100 spring clamp connector or the STBXTS1100 screw type connector depending on your wiring preference. The STBPDT3100 or STBPDT3105 power distribution module supplies the 24 V DC. Confirm the logic bus current draw of 55 mA at 5 V DC when planning the segment.
Maintenance and Reliability
Check the three LED indicators during routine rounds. The green RDY LED shows module status, the green per-channel LEDs (IN1 to IN6) show channel status, and the red ERR LED flags a module error. Inspect connectors for loose terminations and verify the integrated 10 A time-lag fuse on the PDM if inputs stop responding. Keep the cabinet within the stated temperature and humidity limits, and avoid condensation. Because the kit supports cold swapping, you can plan replacements during scheduled outages.
Compatibility and Integration
The STBDDI3610K belongs to the Modicon STB distributed I/O solution. It works with the STBXBA1000 I/O base and the STBPDT3100 or STBPDT3105 power distribution module. The kit ships with both a spring clamp and a screw type connector, so it fits different wiring practices. If you run standard NIMs, hot swapping is supported, which helps when you need to replace a slice without stopping the whole segment.
What to Verify Before You Buy
Confirm your field devices match the 24 V DC input range and that your logic bus can supply 55 mA at 5 V DC. Check that your enclosure meets the IP20 and pollution degree 2 requirements. Decide whether you need the spring clamp or screw type connector, though the kit includes both. For current lifecycle status and availability, contact SpareTechPLC before ordering. SpareTechPLC supplies industrial automation parts and can help you confirm that the STBDDI3610K fits your Modicon STB installation.
Frequently Asked Questions
Q: Can I replace just the module without replacing the base?
A: The kit includes the STBXBA1000 base, but the module, base, and connectors are separate items in the kit composition. You can reuse an existing base if it is in good condition.
Q: Does the STBDDI3610K support hot swapping?
A: Yes, hot swapping is supported for standard NIMs. Cold swapping is also supported.
Q: What input voltage range does it accept?
A: The inputs are rated 24 V DC, with state 1 limits of 15…30 V and state 0 limits of -3…5 V. Permissible voltage is 30 V, and the absolute maximum is 56 V for 1.3 ms.
Q: What do the LEDs tell me?
A: A green RDY LED shows module status, green per-channel LEDs (IN1 to IN6) show channel status, and a red ERR LED indicates a module error.
Q: What certifications does it carry?
A: The STBDDI3610K carries FM Class 1 Division 2, UL, and CSA certifications, and is marked CE.
