Nortech Systems RS-422/485 User Manual

The cables that connect to the input and output connectors on the sDIO can be ordered as 
a set of four cables: two input cables and two output cables. These cables have a mating 
plug on one end and unterminated flying leads on the other end. The wire size of the 
Adept cables is 0.18 mm

2

 (24 AWG). You can use these cables to connect to the digital 

inputs/outputs in your system or to a wiring block. 

To comply with IEC 1131, if you choose to supply a wiring block, it should be capable of 
accepting wire in the range of 0.18 mm

2

 (24 AWG) to 2.0 mm

2

 (14 AWG).

The X3 and X4 input connectors on the front of the sDIO are similar except that X3 handles 
the group 1 and group 2 input signals and X4 handles the group 3 and group 4 input 
signals. The optional digital input cables can be connected to either X3 or X4. Make sure to 
clearly label the cables once you have completed your installation so that the cables do not 
get swapped by mistake; see the warning below.

The X1 and X2 output connectors are also similar except that X1 handles the group 1 and 
group 2 output signals and X2 handles the group 3 and group 4 output signals. The 
optional digital output cables can be connected to either X1 or X2. Make sure to clearly 
label the cables once you have completed your installation so that the cables do not get 
swapped by mistake; see the warning below.

Make sure to clearly label the X1 to X4 digital 

I/O cables so that they are always plugged into the correct 
connector. Swapping the X3 and X4 or X1 and X2 cables 
could cause damage to your equipment. Depending on the 
installation, this could potentially cause injury to 
personnel in the area.