Instruction Manual

GuardPLC 1800 Controllers 9

Rockwell Automation Publication 1753-IN002C-EN-P - June 2010

LS+, not L+, should be used for short-circuit protection. Each LS+ features individual

short-circuit and EMC protection that make it important to use LS+ for only its eight related

inputs.

Line Control

The short-circuit and line break monitoring system, such as E-stop inputs, cannot be configured

for the GuardPLC 1800 controller. This is due to the fact that the 24 discrete inputs are actually

analog inputs with a resolution of one bit.

Safety-Related Analog Inputs

The controller has 8 analog inputs with transmitter supplies for the unipolar measurement of

voltages from 0…10V, referenced to L-. A 10 KΩ shunt is used for single-ended voltage signals.

With a 500 Ω shunt resistor, currents from 0…20 mA can also be measured.

The feeder lines should be no more than 300 m (984 ft) in length. Use shielded, twisted-pair

cables, with the shields connected at both ends, for each measurement input.

Unused analog inputs must be short-circuited. Place wire jumpers into any inputs that are not

used.

31 LS+ Sensor supply for inputs 17…24

32 17 Digital input 17

33 18 Digital input 18

34 19 Digital input 19

35 20 Digital input 20

36 21 Digital input 21

37 22 Digital input 22

38 23 Digital input 23

39 24 Digital input 24

40 L- Reference pole

Terminal Number Designation Function

T1 I1 L- T2 I2 L-

41 42 43 44 45 46

Wire Jumper