Technical Specifications Overview
The table below details the core technical parameters of this digital output module.
| Parameter | Specification |
|---|---|
| Model Number | NMTU-21C 3BSE017429R1 |
| Product Type | Digital Output Module |
| Compatible System | ABB Procontrol P14 / AC 800M Series |
| Number of Outputs | 16 points (isolated relay outputs) |
| Output Type | Relay (Form C, changeover contact) |
| Contact Rating (Resistive) | 3 A at 250 VAC / 30 VDC per point |
| Contact Rating (Inductive) | 0.8 A at 250 VAC / 0.8 A at 30 VDC (cosφ = 0.4) |
| Minimum Switching Load | 5 VDC, 10 mA |
| Mechanical Life | 30,000,000 operations (minimum) |
| Electrical Life | 150,000 operations (minimum at rated load) |
| Response Time (ON/OFF) | 10 ms (typical) |
| Internal Power Draw | 5 VDC, 250 mA |
| External Power Supply | 24 VDC (for relay coil drive) |
| Dimensions (W x H x D) | 67 mm x 130 mm x 120 mm |
| Weight | 0.45 kg |
| Terminal Type | 34-point removable screw terminal block |
| Indicators | 16 green LEDs (one per output channel) |
| Isolation Voltage | 2500 VAC (between field and logic) |
Robust Relay Output Performance
The NMTU-21C 3BSE017429R1 digital output module delivers 16 high-current relay outputs for demanding switching applications. Each channel features a Form C changeover contact, which provides both normally open and normally closed connections for maximum wiring flexibility. This digital output module handles resistive loads up to 3 A per point, making it suitable for driving contactors, motor starters, solenoid valves, and heating elements.
The relay contacts offer 2500 VAC isolation between the control logic and field circuits. Therefore, this digital output module effectively protects the main processor from voltage surges and short-circuit faults. The 10 ms typical response time ensures reliable performance for most sequencing, interlocking, and batch control applications. The mechanical life of 30 million operations and electrical life of 150,000 operations guarantee long-term durability in high-cycle environments.
Physical Design and Installation Features
This digital output module mounts directly onto the Procontrol P14 or AC 800M backplane, occupying a single slot. The module measures 67 mm in width, 130 mm in height, and 120 mm in depth, with a weight of 0.45 kg. A 34-point removable screw terminal block on the front panel accepts all field wiring connections, simplifying both initial installation and ongoing maintenance.
Sixteen green LEDs illuminate individually to show the ON/OFF status of each output channel. Consequently, maintenance personnel can quickly diagnose field circuit issues without needing a programming terminal. The screw terminals accept wires up to 2.5 mm² (AWG 14), ensuring secure and reliable connections for high-current loads.
Power and Environmental Specifications
The NMTU-21C 3BSE017429R1 draws 250 mA from the 5 VDC backplane and requires an external 24 VDC supply for relay coil energization. This digital output module operates reliably across a temperature range of 0°C to 60°C. It also withstands humidity from 5% to 95% (non-condensing) and resists vibration up to 2G at 10-150 Hz.
Details
| Weight | 0.45 kg |
|---|---|
| Dimensions | 67 × 130 × 120 mm |
