Festo CMMT-ST-C8-1C Series, Руководство пользователя

Страница: 23 / 58

Festo — CMMT-ST-C8-1C-...-S0 — 2021-04b
Installation
23
7.4 Interfaces
7.4.1 [X1A], inputs and outputs for the higher-order PLC
The I/O interface [X1A] is located on the front of the device. This interface features:
–
2 freely configurable digital outputs (parameterisable switching logic, PNP logic or NPN logic)
–
2 freely configurable digital inputs (parameterisable switching logic, PNP logic or NPN logic)
–
1 digital input for the power stage enable and reset error functions; whether or not the function
will be used can be parameterised in the plug-in (parameterisable switching logic, PNP logic or NPN
logic)
–
2 inputs for the circuitry of the safety sub-function STO (#STO-A, #STO-B)
–
2 contacts for the circuitry of the diagnostic contact of the safety sub-function STO (STA-C1, STA-C2)
Detailed information on the circuitry of the product safety sub-functions can be found in the
è Manual Safety sub-function è 1.2 Applicable documents.
The functional inputs and outputs of this I/O interface are used for coupling to a higher-order PLC,
for example. The devices connected to the CMMT-ST all need to have the same switching logic (PNP/
NPN). The configuration
PNP and NPN logic
–
PNP logic means that a potential is switched.
–
NPN logic means that earth is switched.
The required switching logic can be parameterised using the CMMT-ST plug-in
è
online help for the
CMMT-ST plug-in.
Signal Level Input Outlet
logic 0 0 V internal via pull-down resistor internal via pull-down resistor
logic 1 24 V – via high-side driver (delivers cur-
rent)
Tab. 11: PNP logic
Signal Level Input Outlet
logic 0 24 V internal via pull-up resistor internal via pull-up resistor
logic 1 0 V – via low-side driver (consumes cur-
rent)
Tab. 12: NPN logic