For machinery originally using the ROD 1931 1200 ID:689890-02 encoder, a 1:1 customized replacement solution can be provided that preserves the original encoder’s mechanical and electrical interfaces while maintaining functional compatibility with existing control systems. The replacement is developed to match the installation footprint, shaft coupling design, and incremental feedback requirements of the ROD 1931 series, enabling direct integration without alterations to the mounting structure or controller configuration.
From a technical perspective, the replacement encoder is configured as an incremental rotary encoder with 1200 pulses per revolution (PPR), consistent with the ROD 1931 1200 specification. Incremental output signals are delivered in an industrial standard format (e.g., HTL/TTL or equivalent), ensuring reliable counting and direction information for PLCs, motion controllers, and drive systems. The electrical design supports a typical industrial DC supply range and is optimized for signal integrity over standard cable lengths. Mechanical compatibility is achieved by matching the shaft interface and flange dimensions of the original ROD 1931 family, facilitating a direct swap during maintenance or retrofit.
Mechanically, the replacement unit emphasizes durability and long-term stability. Reinforced bearings and a rigid housing structure support continuous operation at elevated speeds and provide resistance to vibration and shock encountered in industrial environments. With alignment to the original mounting and signal behavior, the ROD 1931 1200 (ID:689890-02) replacement encoder delivers dependable incremental feedback suitable for motion control applications where accurate speed and position information is essential for process stability.
Technical data
| Parameter | Specification |
| Model | ROD 1931 |
| Incremental signals | HTLs - C |
| Output pulse * | 600, 1024, 1200, 2400 |
| Scanning frequency | ≤100 kHz |
| Edge separation $a$ | ≥ 0.62 μs |
| System accuracy | ± 1/10SP |
| Power supply | 10.8V to 16.5V |
| Current consumption (without load) | ≤ 70 mA |
| Source / Sink max. | ≤ 40 mA |
| Electrical connection | Terminal board |
| Shaft | Solid shaft D = 15 mm |
| Mech. permissible speed n | ≤ 4000 min^-1} |
| Starting torque (at 20°C) | ≤0.05 Nm |
| Moment of inertia of rotor | 2.5⋅10−5 kgm^2 |
| Shaft load | Axial: 100 N, Radial: 100 N |
| Vibration (25 to 200 Hz) | ≤100 m/s^2 (JIS C 60 068-2-6, EN 60 068-2-6) |
| Shock (6 ms) | ≤1000 m/s^2 (JIS C 60 068-2-27, EN 60 068-2-27) |
| Max. operating temp. | 70°C |
| Min. operating temp. | -20°C |
| Protection EN 60 529 | IP66 |
| Weight | Approx. 4.5 kg |
