Controladores lógicos programables PLC baja gama expandibles entradas digitales AC 74368-SR22MRDC ARRAY Manual Ingles www.viaindustrial.com
Controladores lógicos programables PLC baja gama expandibles entradas digitales AC 74368-SR22MRDC ARRAY Manual Ingles www.viaindustrial.com
Fig. 2.6 AC Type Fig. 2.7 DC Type
2.2.2 Connecting Inputs
The input to FAB can be either digital, such as on/off switches etc., or analog,
such as pressure, temperature, humidity, flow, etc. The specific requirements are as follows:
Type
Demand
SR-12MRA
SR-22MRA
SR-12MRD
SR-22MRD
SR-12MTD
SR-22MTD
Switch Status 0 <40VAC <5VDC <5VDC
Input Current <0.24mA <1.5mA <2.8mA
Switch Status 1 ¡
Ý
85VAC ¡
Ý
10VDC ¡
Ý
10VDC
Input Current Typical 0.24 mATypical 3mA Typical 3 mA
Analogue Input No A0~A5/A0~A7 A0~A5/A0~A7
Note:
1. For SR-12MRD, SR-12MTD, SR-22MRD and SR-22MTD that can receive analog
input. They can be set to analog input or digital input as either may be used in the
program. They will be recognized as analog inputs when the input terminal is
connected with an analog function block, and they will be recognized as digital
inputs when the input terminal is not connected with an analog function block.
2. The analog inputs require 0V ~ +10V voltage signals. These are divided equally in
0.1V increments. In programming, all the block parameters related to the analog
inputs are based on the minimum increment of 0.1V.
3. They can be recognized as digital input when the input voltage is more than 10.0V
and cannot be recognized as an analog input.
4. For the digital input off, when the switch status changes from 0 to 1, the time of
Status 1 must be greater than 50ms, and when the switch status changes from 1 to 0,
the time of Status 0 also must be greater than 50ms.
