Pepper Computer RS232, RS485 user manual SM-DIN1, Introduction, Specifications

Chapter 4 Digital Modules SMART I/O User’s Manual

4. Digital Modules

4.1SM-DIN1

4.1.1Introduction

The SM-DIN1 provides 8 optoisolated 24V DC digital inputs arranged in 6 independent groups with respect to the ground connections. The maximum input switching frequency is set to 200Hz with the system registering a logical ‘1’ when the input exceeds 10V. Logical ‘0’ is returned when the input falls below 8V. A low-pass filter restricts signals exceeding the filter limit and registers a logical ‘0’ with the system. The user interface is realized by 8 green LEDs (one per input channel) which illuminate when the input exceeds 10V DC and a configurable filter on the last channel for INTx interrupts (where ‘x’ lies between 1 and 4 depending on which slot the module is located).

4.1.2 Specifications

4

Isolation Input

2.5 kV optoisolated from the system

8 Digital Channels (24V) DC ± 10%

6 Independent Groups

Common GND

<5mA Input Current Filter set to 200 Hz (5ms) Overvoltage Protection (rate) Overvoltage Protection (continuous) Switch ON Delay

Switch OFF Delay High Level

Low Level

:300V/90∝s

:35V

:2ms (approx.)

:2ms (approx.)

:> 10V

:< 8V

Front Panel	Green LEDs (ON when Input > 10V)
Options	User configurable R-C filter on the
	last channel for INTx generation
Power Consumption	5mW (min.), 100mW (max.)
Temperature Range	Standard (0°C to +70°C), Extended (-40°C to +85°C)
Module Weight	40g
ID Byte	$01, read by the SPI Interface

March 12, 1996 ©1996 PEP Modular Computers GmbH Page 4 - 5