Westinghouse 1C311189G01 PLC CNC after-sales service improvement

Description

A +48V on-board power supply provides current limited contact wetting voltage if

the 1C31189G01 contact is open. If the contact closes, current is drawn from the +10V supply

which turns on the associated opto-isolator; thereby, relaying a closed contact state

to the I/O bus. The opto-isolators and the isolation provided by the 10V and 48 Volt

power supply provide high dielectric isolation between the 1C31189G01 fifield side and the logic

or I/O bus side.

There are two methods of wiring fifield devices to the Compact Contact Input

Module termination block, as shown in Figure 9-2. Each fifield contact may have a

separate input and return line as shown for channel 1. Alternatively, fifield contacts

wired to the same Contact Input Module may share a return line as shown for

channels 2 and 3. For either wiring method, do not tie the contact return line to earth

ground or a ground fault condition will occur as well as a degradation of the

common mode surge protection.

Debouncing of a contact input signal is done by an RC fifilter and digital debouncer

on the logic side. If a contact changes state for 1C31189G01 less than 3 msec, the change of state

will always be rejected. If the Contact changes state for more than 7 msec, the

change of state will always be accepted.

Ground fault detection circuitry on the Compact Contact Input Module activates

when the input or return line for any channel fifinds a low impedance (<5K ohms)

path to earth ground. A single wire with a ground fault will not cause an error in the

point data, but multiple ground faults, if they include input and return lines, could

cause faulty data (that is, channels appearing as if their contacts are closed when

they are really open).

When a ground fault occurs, the external error LED lights, and the GND Fault bit

in the Status Register (Section 9-7) is set. If the 1C31189G01 GND Fault Attention Enable bit is

set in the Confifiguration Register (Section 9-7), a ground fault is seen as a

catastrophic error causing an attention status to be sent back to the Controller. See

Figure 9-2 for ground fault detection circuitry

Why are the prices of many products of our company more competitive?
(1) Source purchase to reduce the price difference in the intermediate phase
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Lead time problem
(1) For the spot products in stock, the delivery can be arranged on the same day after the contract payment is signed
(2) Order products and deliver according to the quoted delivery date
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For the simple purchase procedure of spare parts, ensure that they are delivered to the site in a timely manner, and help users reduce the risk of downtime caused by the shortage of spare parts
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Details: If you need urgent delivery orders, please feel free to contact us, and we will try our best to meet your needs.
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