Chapter 7 I/O Module
7-1
Chapter 7 I/O Module
7.1 Notice in Selecting Module
Here describes the notices when selecting digital I/O module used for XG series.
1)
For the type of digital input, there are two types such as current sink input and current
source input.
For DC input module, as the wiring method of external input power varies according to
such input type, consider the specification of input connecting device when selecting.
2) Max. simultaneous input point depends on the module type. It is subject to input voltage,
ambient temperature. Review the specification of input module to apply before using.
3) In case that open/close frequency is high or it is used for conductive load open/close, use
Transistor output module or triac output module as the durability of Relay Output Module
shall be reduced.
4) For output module to run the conductive (L) load, max. open/close frequency should be
used by 1second On, 1 second Off.
5) For output module, in case that counter timer using DC/DC Converter as a load was used,
Inrush current may flow in a certain cycle when it is ON or during operation. In this case, if
average current is selected, it may cause the failure. Accordingly, if the previous load was
used, it is recommended to connect resistor or inductor to the load in serial in order to
reduce the impact of Inrush current or use the large module having a max. load current
value.
6) For output module, fuse is not possible to change. This is to prevent of burnout of external
wiring in case of short circuit of module output. This may not protect output module. In
case that output module is destroyed in error mode except short circuit, fuse may not work.
Output
modu
le
Resistor
Load
Out
put
module
Inductor
Load
