Product Overview
Technical Summary
| Parameter | Value |
|---|---|
| Module type | DI 16x 24 … 125 V UC HF |
| Digital input channels | 16 |
| Signal 0 | -5 … +5 V |
| Signal 1 | +11 … +146 V |
| Rated input voltage | 24 V, 48 V, 125 V DC; 24 V, 48 V, 125 V AC (50 – 60 Hz) |
| Input delay | 0.05 / 0.1 / 0.4 / 1.6 / 3.2 / 12.8 / 20 ms parameterizable with DC; 20 ms fixed with AC |
| Counter channels | 2; Channel 0 and 1, from FS04 |
| Counting frequency, max. | 6 kHz |
| Front connector | Screw terminals or push-in terminals; ordered separately |
| Power consumption from backplane bus | 1.2 W |
| Isolation test voltage | 2 000 V DC |
Applications
- Digital signal acquisition: The module supports freely usable digital inputs for acquiring 24…125 V UC signals.
- Counter operation: The module supports counter operation on Channel 0 and 1 from FS04, with a maximum counting frequency of 6 kHz.
Key Features
- 16 digital input channels: DI 16x 24…125 V UC HF with 16 digital inputs in groups of 1; all 16 inputs can be simultaneously controllable.
- Input signal ranges: Signal 0: -5 … +5 V. Signal 1: +11 … +146 V. Rated input values are 24 V, 48 V, and 125 V DC or AC (50 – 60 Hz).
- Parameterizable input delay: DC input delay is parameterizable at 0.05 / 0.1 / 0.4 / 1.6 / 3.2 / 12.8 / 20 ms; AC input delay is fixed at 20 ms.
- Diagnostics and interrupts: The module has diagnostics, diagnostic alarms, hardware interrupts, wire-break diagnosis to I < 550 μA, RUN and ERROR LEDs, and channel status and diagnostic LEDs.
- Counter function: Up to 2 channels support counters from FS04, on Channel 0 and 1, with a maximum counting frequency of 6 kHz, 32-bit counting width, and up counting direction.
- Connection and isolation: The front connector with screw terminals or push-in terminals is ordered separately. Channels are isolated in groups of 1 and isolated from the backplane bus; isolation is tested with 2 000 V DC.
Frequently Asked Questions
1. How many digital input channels does Siemens 6ES7521-7EH00-0AB0 have?
It has 16 digital input channels, with all 16 inputs simultaneously controllable.
2. Which input signals does 6ES7521-7EH00-0AB0 support?
Signal 0 is -5 … +5 V and signal 1 is +11 … +146 V. Rated input values are 24 V, 48 V, and 125 V DC or AC (50 – 60 Hz).
3. What connector is included with the module?
It is without a front connector. A front connector with screw terminals or push-in terminals must be ordered separately.
