turck BL67 - 5 Digital Input Modules; Overview

D300529 0115 - BL67 I/O modules
5-3
Overview
5.1 Overview
Digital input modules (DI) detect electrical high- and low-level values through the base module con-
nections and transmit the corresponding digital value to the gateway via the module bus.
The modules provide optically isolated inputs according to IEC 61131 Type 1.
The sensor supply (V
sens
) is tapped from the internal voltage supply bus.
This voltage is supplied by the gateway or a Power Feeding module. Both contain a short circuit detec-
tion for the sensor supply voltage.
In the modules without diagnostic function a sensor short circuit is thus detected in the gateway or in
the Power Feeding module.
The modules with diagnostic function (BL67-xDI-PD) provide a short circuit protection.
The modules provide reverse polarity protection.
LED displays
 modules without channel- or connector-diagnosis:
Channel statuses are indicated by LEDs. Error signals from the I/O level are indicated by each mod-
ule via the "D" LED.
 modules with channel- or connector-diagnosis:
The modules BL67-xDI-PD provide whether a channel- or a connector diagnosis function. Diagnosis
information are indicated via the channel LED or via the "D" LED.
5.1.1 Module overview
Table 5-1:
Module overview
Module No. of channels Positive switching
BL67-4DI-P 4 
BL67-8DI-P 8 
BL67-4DI-N 4 -
BL67-8DI-N 8 -
BL67-4DI-PD 4 
BL67-8DI-PD 8 
BL67-16DI-P 16 