Explore BrainMass
Share

PLC and Circuit Diagrams

This content was STOLEN from BrainMass.com - View the original, and get the solution, here!

5
(d) The circuit shown in FIGURE 3 is part of the interface of a relay output module. Ib is 1 mA and Vcc is 9 V. The relay requires a minimum of 50 mA to energise.
Complete the values of the assumptions listed below in order to calculate:

• Voltage across R1 • value of Ri • voltage across the relay coil • voltage across R2 • value of R2 • collector of current

Assumptions:
Logic '1' = V Logic '0' = V
Transistor forward current gain h_i_e = LED current = 10 mA
LED voltage drop at 10 mA = V Base/emitter voltage = V Collector emitter voltage when transistor is on = 1 V

© BrainMass Inc. brainmass.com September 21, 2018, 1:55 am ad1c9bdddf - https://brainmass.com/engineering/electrical-engineering/plc-circuit-diagrams-423435

Attachments

Solution Summary

This posting contains the solution to the given problems.

$2.19