28-Pin Terminal Block Modules

At a Glance

The High Speed Counting function is supplemented by a 28-pin terminal block.

There are two types of 28-pin terminal blocks:

BMX FTB 2820 spring terminal blocks.
BMX FTB 2800 caged terminal blocks.

Cable Ends and Contacts

The terminal block can accommodate:

Bare wires
Wires with DZ5-CE type cable ends:

Description of the 28-Pin Terminal Blocks

The table below shows the description of the 28-pin terminal blocks:

		Spring terminal blocks	Caged terminal blocks
Illustration
Number of wires accommodated		1	1
Number of wire gauges accommodated	minimum	0.25 mm2 (AWG 24)
Number of wire gauges accommodated	maximum	1.5 mm2 (AWG 16)
Wiring constraints		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.	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.
Maximum screw tightening torque		-	0.5 N•m (0.37 lb-ft).
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 28-Pin Terminal Blocks

Labels for the 28-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:

One side that is visible from the outside when the cover is closed. This side features the commercial product references, an abbreviated description of the module, as well as a blank section for customer labeling.
One side that is visible from the inside when the cover is open. This side shows the terminal block connection diagram.

Sensor Connections

The example below shows three-wire input devices used on inputs IN_A and IN_B and two-wire devices used on inputs IN_EN and IN_SYNC:

IN_A input

IN_B input

IN_SYNC input (synchronization input)

IN_EN input (enable input)

Encoder Connection

The example below shows an incremental encoder used for axis control and the three auxiliary inputs used especially for largest mode (Free Large Counting):

Encoder (inputs A, B and Z)

IN_REF input (homing input)

IN_EN input (enable input)

IN_CAP input (capture input)

Connecting Outputs and Output Supplies

The figure below shows the connection of supplies and actuators to the 28-pin connector:

24 V supply for actuators

24 V supply for sensors

Actuator for the Q0 output of counting channel 0

Actuator for the Q1 output of counting channel 0

Actuator for the Q0 output of counting channel 1

Actuator for the Q1 output of counting channel 1