Technical Specifications
| Parameter | Specification |
|---|---|
| Model | NFAF135‑S00 |
| Type | Frequency Input Module (8‑channel, isolated) |
| Number of Input Channels | 8, individually isolated |
| Input Signal Types | Contact ON/OFF, voltage pulse (rectangular wave) |
| Frequency Input Range | 0.1 Hz to 10 kHz |
| Frequency Accuracy | ±0.1 % of reading |
| Minimum Input Pulse Width | 40 µs |
| Withstanding Voltage | 500 V AC between input & system, and between channels (1 min) |
| Power Supply / Current Consumption | Field power: 24 V DC or 12 V DC; max current ~300 mA (5 V) / ~400 mA (24 V) |
| External Dimensions | Width ≈ 110 mm × Height ≈ 30 mm × Depth ≈ 110 mm |
| Weight | Approx. 0.3 kg |
FAQ
Q1: What does the model code “‑S00” in NFAF135‑S00 indicate?
A1: The suffix “S00” indicates the standard type (no explosion protection) and basic version for the frequency input module.
Q2: What kinds of input signals can the NFAF135‑S00 accept?
A2: It can accept contact ON/OFF signals or voltage pulses (rectangular wave), suitable for pulses from mechanical or electronic sensors.
Q3: What is the frequency range measurable by this module?
A3: The module can measure frequencies from 0.1 Hz up to 10 kHz, enabling wide‑range measurement from slow rotating equipment to high‑speed sensors.
Q4: What does the isolation specification of this module mean?
A4: It means each of the 8 input channels is electrically isolated from the system and from each other, withstanding up to 500 V AC for 1 minute, improving safety and noise immunity.
Q5: How small is the module and how heavy is it?
A5: The module has external dimensions of approximately 110 mm × 30 mm × 110 mm and a weight around 0.3 kg, making it compact and lightweight for rack or DIN‑rail installation.
Q6: How accurate is the frequency measurement performed by the module?
A6: Frequency accuracy is specified as ±0.1 % of the reading, which ensures reliable measurement in control applications.
Q7: What power supply does the module use and what is its current consumption?
A7: The module uses 24 V DC (or 12 V DC selectable) for the field power supply, and the current consumption is up to ~300 mA at 5 V or ~400 mA at 24 V.
Q8: Is the NFAF135‑S00 suitable for industrial automation and what applications are typical?
A8: Yes. It is designed for industrial automation systems, including applications like wind turbine speed monitoring, water and waste‑water treatment, and high‑reliability measurement conditions.
