Introduction to the TBX DMS 16C22 module
(Original Document)
About us
General
The TBX DMS 16C22 is a modular base unit with 8 24 V DC inputs compatible with 2- and 3‐wire proximity sensors, and 8 24 V DC transistor outputs. The module is equipped with a terminal for the direct wiring of sensors and preactuators which can be removed when the power is switched off.
The sensor voltage and preactuator voltage are monitored to ensure that there is sufficient voltage for the inputs to operate correctly and for coherent processing of the outputs.
The outputs are protected against overloads and short-circuits. If there is a fault at an output, it is set to a safe state, the default state, which is determined by the user: fallback position.
Once the fault has been corrected, the output can be reactivated, if it is reset.
The inputs/outputs of this module have functions which, in certain cases, are common to a group of channels. Thus, it is possible to assign the 2 channel groups of the module to the various tasks in the application.
Specific function
The input and output wiring check functions for this module continually check the quality of the connections to the sensors and preactuators. Two dip-switches , on the board, enable the channels to be adapted to their environment.
Output wiring check faults enable diagnosis of a short‐circuit or an open circuit depending on the channel state.
The module provides independent power supplies: +Csn,n+1 (one for 2 sensors) which are protected against line short‐circuits (0.1 A maximum current).
Technical specifications
The following table provides the technical specifications of the module.
TBX DMS 16C22
Nominal voltage +SV
24 V DC
Supply voltage +SV
19,2 V DC to 30 V DC
Current drawn on +SV of the base module (at 24 V)
if basic unit
40 mA typically
if extension base unit
10 mA typically
Current drawn at +SV by extension module (at 24 V)
30 mA typically
Current drawn at +IS (at 24 V)
(loading = 60 %)
35 mA typically
Current drawn at +OS (at 24 V)
(with no active outputs)
25 mA typically
Power dissipated at nominal load in the module
(loading = 60 %)
3,4 W at 24 V
Dielectric strength between inputs and ground (GND)
1500 V rms - 50/60 Hz for 1 min
Isolation resistance
> 10 MΩ below 500 V DC
Key:
SV
Power supply to module (communication module if present and input/output interfaces).
IS
Power supply to sensors.
OS
Power supply to pre‐actuators.