The IC-8701 is a peripheral module for the TC800 system, designed for applications requiring fast processing of binary signals.
The module offers:
- 8× DI (5–24 V DC) with a frequency of up to 100 kHz,
- 8× DO (5–24 V DC) implemented as ½ H-bridges (up to 2.7 A continuous output) or 4× push-pull transistor outputs with a frequency of up to 100 kHz.
There are 4 independent 32-bit counter devices with modes for up/down counting, IRC, period measurement, pulse width measurement, phase shift measurement, and PWM input. In up-counting mode, up to 8 counters can be used (4 up to 100 kHz and 4 up to 5 kHz).
The outputs can be configured to support up to 4 independent PWM channels or to control up to 4 stepper motors (STEP/DIR signals).
Both the inputs and outputs are connected to a standard 34-pin connector. The outputs are solid-state and feature overcurrent and thermal protection.
The module features input and output circuits that require an external supply voltage for each set of four inputs and outputs (VDIx and VDOx, respectively). In order to function, the module does not require the VIO supply connected to the power supply module (PW-8901).
The four inputs and outputs are galvanically isolated from the internal circuits and from each other.
Detailed information about the module is provided in the TXV 004 72 documentation.
Fig. 1 Example of DI and DO connections for the IC-8701 module with different power supplies
Notes:
- DI0 through DI3 are powered by a 24 VDC power supply (PW1) connected to VDI1 and COM1; the inputs share a common terminal -
- DI4–DI7 are powered by a 5 VDC power supply (PW2) connected to VDI2 and COM2; the inputs share a common terminal -
- DO0–DO3 are powered by a 24 VDC power supply connected to VDO1 and COM3; the outputs share a common terminal +
- DO4–DO7 are powered by a 5 VDC power supply connected to VDO2 and COM4
| Max. power consumption from the UVM power supply |
8 mA |
| Maximum power loss of the module |
2,5 W |
| Number of DI Inputs |
8 |
| Configuration of Inputs into Groups |
2 x 4 |
| Galvanic Isolation from Internal Circuits |
yes |
| Galvanic isolation between I/O groups |
yes |
| Common terminal |
the negative terminal |
| VDI Supply Voltage |
4 ÷ 30 V DC |
|
Input voltage |
|
| for log.0 (UL), pulse width 5–10 µs / >10 µs |
max. 0,18 * VDI / 0,3 * VDI |
| for log.1 (UH), pulse width 5–10 µs / >10 µs |
min. 0,55 * VDI / 0,45 * VDI |
| Input current at log.1 |
typ. 4 mA (at 24 V DC) |
| Number of DO Outputs |
8 |
| Configuration of Outputs into Groups |
2 x 4 |
| Galvanic Isolation from Internal Circuits |
yes |
| Galvanic isolation between I/O groups |
yes |
|
Output type |
semiconductor output, half-bridge (push-pull) |
|
Switching Voltage |
4,8 ÷ 30 V DC |
|
Switching Current |
Each output: 2.7 A continuous, 4 A pulsed |
|
at an ambient temperature of 25°C at an ambient temperature of 50°C |
Total output current in the group < 6 A Total output current in the group < 4 A |
| Residual current upon disconnection |
2 mA max |
|
Closing time |
1,6 µs max |
|
Opening time |
0,6 µs max |
|
Short circuit protection |
yes |
| Insulation voltage between inputs and internal circuits |
500 V |