Means of Connecting Discrete I/O Modules: Connecting Screw Terminal Block Modules
(Original Document)
At a Glance
Discrete I/O module terminal blocks feature an automatic code transfer device activated on first use. This allows fitting errors to be avoided when replacing a module. This coding guarantees electrical compatibility by module type.
Description of the screw terminal block
Every terminal block can receive bare wires or wires with terminations or spade terminals.
The capacity of each terminal is:
Illustration of the termination and the spade terminal.
(1) 
5.5 mm maximum.
The maximum capacity of the terminal block is 16 x 1 mm2 wires (AWG) + 4 x 1.5 mm2 wires (AWG).
Screw clamps come with slots for the following types of screwdriver:
Screw connection terminal blocks feature captive screws. On the supplied blocks, these screws are not tightened.
NOTE: the maximum torque for tightening connection terminal block screws is 0.8 N.m
NOTE: Screw terminal blocks must be engaged or disengaged with sensor and pre-actuator voltage switched off.
The following diagram shows the method for opening the screw terminal block door.