OMRON SRT2-ID16T-1 – 16-Point NPN Remote I/O Input Module | CompoBus/S Platform
Engineering Background
The OMRON SRT2-ID16T-1 is a high-density digital input slave unit designed for the CompoBus/S (also known as DeviceNet remote I/O) distributed control architecture. Engineered for demanding industrial environments, this module enables seamless integration of field-level sensors and switches into OMRON PLC-based control systems with minimal wiring overhead and deterministic scan-cycle performance.
Product Positioning
Targeted at automation engineers building distributed I/O networks in manufacturing, material handling, and process control applications, the SRT2-ID16T-1 delivers 16 NPN (sink-type) digital inputs in a compact DIN-rail-mountable form factor. It is the preferred choice for system integrators requiring reliable, high-speed remote I/O expansion without the complexity of full fieldbus implementations.
Complete Technical Specifications
| Model Number | SRT2-ID16T-1 |
| Manufacturer | OMRON Corporation (Japan) |
| Series | SRT2 / CompoBus/S Remote I/O |
| Module Type | Digital Input Slave Unit |
| Number of Input Points | 16 points (NPN / Sink type) |
| Input Voltage | 24 VDC (±10%) |
| Input Current | Approx. 6 mA per point |
| ON Voltage | 15 VDC min. |
| OFF Voltage | 5 VDC max. |
| Response Time | 1.0 ms max. (ON/OFF) |
| Communication Protocol | CompoBus/S (High-speed mode / Long-distance mode) |
| Baud Rate | 750 kbps (High-speed) / 93.75 kbps (Long-distance) |
| Node Address Setting | Rotary switch (0–15) |
| Power Supply | Supplied via CompoBus/S communications cable |
| Current Consumption | 80 mA max. (from communications power supply) |
| Isolation | Photocoupler isolation between I/O and internal circuit |
| Indicators | PWR (green), COMM (green), ERR (red), 16× IN point LEDs |
| Connector Type | MIL connector (34-pin) |
| Mounting | DIN rail (35 mm) or direct panel mount |
| Operating Temperature | 0 to 55°C |
| Storage Temperature | -20 to 65°C |
| Humidity | 10% to 90% RH (non-condensing) |
| Vibration Resistance | 10 to 57 Hz, 0.075 mm amplitude; 57 to 150 Hz, 9.8 m/s² |
| Shock Resistance | 147 m/s², 3 times each in X, Y, Z directions |
| Protection Rating | IP20 |
| Weight | Approx. 200 g |
| Country of Origin | Japan |
| Certifications | CE, UL, cUL |
Proven Application Environments
- Automotive Assembly Lines – High-speed sensor polling for part-presence detection and conveyor control
- Semiconductor Fabrication – Cleanroom-compatible distributed I/O for wafer handling equipment
- Food & Beverage Processing – Hygienic-zone sensor integration with OMRON CJ/CS-series PLCs
- Packaging Machinery – Multi-axis synchronization via CompoBus/S high-speed mode
- Material Handling & Logistics – Conveyor belt sensor networks with long-distance mode (up to 200 m trunk)
- Machine Tool Control – Limit switch and proximity sensor aggregation for CNC systems
- Building Automation – HVAC and access control I/O expansion in distributed panel architectures
Engineering Advantages
- High-Density I/O – 16 NPN inputs in a single compact node reduces panel space and wiring cost
- Deterministic Communication – CompoBus/S fixed-cycle scanning ensures predictable I/O refresh for time-critical control loops
- Dual-Speed Operation – Switchable between 750 kbps (high-speed, 100 m max.) and 93.75 kbps (long-distance, 200 m max.) without hardware change
- Photocoupler Isolation – Protects PLC backplane from field-side transients and ground loops
- LED Diagnostics – Per-point input status LEDs plus communication and error indicators accelerate fault isolation
- Simple Node Addressing – Rotary switch eliminates software configuration for node assignment
- Broad PLC Compatibility – Compatible with all OMRON CompoBus/S master units (SRM1, CJ1W-SRM21, CS1W-SRM21, etc.)
System Architecture & Signal Flow
The SRT2-ID16T-1 operates as a slave node on the CompoBus/S network. Field sensors (NPN open-collector or dry-contact) connect to the 34-pin MIL connector. Input signals are photocoupler-isolated and mapped to the master PLC’s I/O memory in a fixed cyclic scan. The master unit (e.g., CJ1W-SRM21) allocates one word (16 bits) of input data per SRT2-ID16T-1 node. Node address is set via the front-panel rotary switch prior to power-up. Communications power and I/O power are supplied separately, allowing I/O power to be cut independently for safety interlocking without disrupting network communications.
Wiring Topology: Multi-drop trunk-and-drop (T-branch) using VCTF or dedicated CompoBus/S cable. Maximum 32 slave nodes per master unit.
Sourcing & Quality Verification
- All units sourced from authorized OMRON distribution channels or verified surplus with full traceability documentation
- Pre-shipment inspection includes: visual inspection, label verification (date code, lot number), and functional power-on test
- Counterfeit screening performed against OMRON genuine product reference database
- Original OMRON packaging preserved where available; repackaged units clearly identified
- Certificate of Conformance (CoC) available upon request for MRO and OEM procurement
Procurement Process
- Confirm Quantity & Lead Time – Contact us via the form below or email [email protected] with your required quantity and delivery timeline
- Receive Quotation – We respond within 1 business day with pricing, availability, and estimated ship date
- Place Order – Secure checkout via Shopify (credit card, wire transfer, or PayPal for B2B accounts)
- Quality Inspection & Dispatch – Units inspected, packed, and dispatched with tracking within 1–3 business days
- After-Sales Support – Technical support available for integration questions, wiring diagrams, and PLC program assistance
Technical FAQ
Q: Is the SRT2-ID16T-1 compatible with OMRON CJ2 series PLCs?
A: Yes. The CJ2 series supports CompoBus/S via the CJ1W-SRM21 master unit, which is fully compatible with all SRT2-series slave modules including the SRT2-ID16T-1.
Q: What is the maximum number of SRT2-ID16T-1 units per network?
A: Up to 32 slave nodes can be connected per CompoBus/S master unit, with node addresses 0–15 for input slaves and 16–31 for output slaves (address allocation depends on master configuration).
Q: Can this module be used with third-party DeviceNet masters?
A: CompoBus/S is OMRON’s proprietary high-speed remote I/O protocol and is not interchangeable with standard DeviceNet (CAN-based). A CompoBus/S master unit is required.
Q: What cable type is required for CompoBus/S wiring?
A: OMRON recommends dedicated CompoBus/S flat cable (DCA1-5C10) or round cable (DCA2-5C10) for high-speed mode. Standard VCTF 2-core cable is acceptable for long-distance mode.
Q: Do you provide a warranty?
A: Yes. All units carry a 90-day functional warranty. Extended warranty and exchange programs are available for volume orders — contact us for details.
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