Introduction to the TBX DES 16C22 module
(Original Document)
About us
General
The TBX DES 16C22 module is a modular base unit comprising 16  24 V DC inputs, compatible with 2 and 3 wire proximity sensors. The module is equipped with a terminal block for direct wiring of the sensors, which can be removed when it is switched off.
The sensor voltage is monitored to ensure that there is sufficient voltage for the inputs to operate correctly.
The inputs 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 wiring check function in this base unit continuously checks the quality of the connection to the sensors and detects the two main faults in a discrete input module:
Wiring check faults are diagnosed for each channel and cause the input to be set to 0.
Two dip-switches , on the board, enable the channels to be adapted to their environment.
Technical specifications
The following table provides the technical specifications of the module.
TBX DES 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) (1)
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 % of inputs ON)
70 mA typically
Power dissipated in the base unit (2)
(loading = 60 % of inputs ON)
2,6 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 interfaces).
IS
Power supply to sensors.
(1)
Current drawn on +SV by the communication module of the base unit: 70 mA (at 24 V).
(2)
Power dissipated in the communication module of the base: 1,7 W at 24 V