20-Pin Terminal Block Modules
 
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At a Glance
The Discrete I/O (8 Input 8 Output) and Analog Input functions are supplemented by a 20-pin terminal block.
There are three types of 20-pin terminal blocks:
Cable Ends and Contacts
Each terminal block can accommodate:
Description of the 20-Pin Terminal Blocks
The table below shows the description of the 3 types of 20-pin terminal blocks:
Screw clamp terminal blocks
Caged terminal blocks
Spring terminal blocks
Illustration
Number of wires accommodated
2
1
1
Number of wire gauges accommodated
minimum
AWG 24 (0.34 mm2)
maximum
AWG 16 (1.5 mm2)
Wiring constraints
Screw clamps have slots that accept:
  • flat-tipped screwdrivers with a diameter of 5 mm,
  • posidriv n° 1 cross-tipped screwdrivers.
Screw clamp terminal blocks have captive screws. On the supplied blocks, these screws are not tightened.
Caged terminal blocks have slots that accept:
  • flat-tipped screwdrivers with a diameter of 3 mm,
  • posidriv n° 1 cross-tipped screwdrivers.
Caged terminal blocks have captive screws. On the supplied blocks, these screws are not tightened.
The wires are connected by pressing on the button located next to each pin. To press on the button, you have to use a flat-tipped screwdriver with a maximum diameter of 3 mm.
Maximum screw tightening torque
0.5 N•m (0.37 lb-ft).
0.5 N•m (0.37 lb-ft).
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Temperature range of wire
Minimum 105 °C
DANGER
ELECTRICAL SHOCK
The terminal block must be connected or disconnected with sensor and pre-actuator voltage switched off.
Failure to follow these instructions will result in death or serious injury.
Labeling of 20-Pin Terminal Blocks
Labels for the 20-pin terminal blocks are supplied with the module. They are to be inserted in the terminal block cover by the customer.
Each label has two sides: