Product Overview
Technical Summary
| Parameter | Value |
|---|---|
| Module type | DI 16×24 V DC HS |
| Digital input channels | 16 |
| Input voltage, rated value | 24 V DC |
| Input voltage for signal 0 | -30 to +5 V |
| Input voltage for signal 1 | +11 to +30 V |
| Input delay | 0.05 to 20 ms, parameterizable |
| Maximum counting frequency | 20 kHz |
| Encoder supply output current | 150 mA max. per group; 300 mA max. per module |
| Supply voltage | 24 V DC; permissible range 19.2 to 28.8 V DC |
| Front connector | Screw terminals or push-in terminals |
| Bus cycle time, min. | 250 μs |
Applications
- Digital signal acquisition: Acquires digital 24 V DC signals through 16 parameterizable inputs.
- Pulse counting: Counts input pulses with up to 4 counters and a maximum counting frequency of 20 kHz.
Key Features
- Digital inputs and signal range: 16 parameterizable digital inputs with a rated input voltage of 24 V DC; signal 0: -30 to +5 V, signal 1: +11 to +30 V.
- Encoder supply: 16 outputs provide 2x 24 V DC encoder supply, with short-circuit protection; output current is max. 150 mA per group and 300 mA per module.
- Counting and oversampling: Supports up to 4 counters, counting frequency up to 20 kHz, 32-bit counting width, up/down counting, and digital input with oversampling.
- Input timing: Input delay is parameterizable from 0.05 to 20 ms for standard inputs; isochronous mode has a bus cycle time of min. 250 μs.
- Diagnostics and interrupts: Provides diagnostic functions, diagnostic alarms, hardware interrupts, supply-voltage and encoder-power monitoring, wire-break detection to I < 350 μA, and channel or module LED indications.
- Connections and electrical data: The front connector uses screw terminals or push-in terminals. Supply voltage is 24 V DC with a permissible range of 19.2 to 28.8 V DC; max. current consumption is 550 mA.
Frequently Asked Questions
1. How many digital inputs does the 6ES7521-7BH00-0AB0 have?
It has 16 parameterizable digital inputs in groups of 8.
2. What input voltage ranges are supported?
The rated input voltage is 24 V DC. Signal 0 is -30 to +5 V, and signal 1 is +11 to +30 V.
3. What counting performance does the module provide?
It supports up to 4 counters, a maximum counting frequency of 20 kHz, and 32-bit counting width.
4. What diagnostics are available?
It provides diagnostic functions, diagnostic alarms, hardware interrupts, supply-voltage and encoder-power monitoring, wire-break detection to I < 350 μA, and LED indications.
5. Which front connector is used?
The front connector has screw terminals or push-in terminals.
