Hypertherm EDGE Pro Ti, Instruction Manual

Page: 74 / 166

74 EDGE Pro Ti CNC Instruction Manual 807660
Installation
I/O connection
Input modes
Inputs have two different modes that are selected using the DIP switch on the Relay I/O board (141278). When DIP
switch position 3 is ON (the default position), inputs are in dry contact mode and normally open. In this situation, inputs
require an external switch (or relay contact) to ground to activate the inputs. The logic states are reversed between the
two input modes. When position 3 of this switch is OFF, the inputs are in the sourced input mode and an external voltage
source of between 12 V and 24 V is required to activate each input.
I/O circuits
Figure 36 shows the details of connecting the I/O to common circuitry. All outputs are relay contacts rated at a maximum
of 1 A, 250 VAC.