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English, Termination, Connection – Velleman projects VMB4PD Short user manual User Manual

Page 4

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4

For connection between the modules, use twisted pair cable (ex. EIB 2x2x0.8mm

2

, UTP 8x0.51mm - CAT5 or other). For long wiring

(>50m) or if a lot of modules ( > 10) are connected to one wire, use minimum 0.5mm² cable
Connect the 12-18Vdc (mind the polarity) and connect the bus wires (mind the polarity). See also the example on page 2.







2. Termination

H

L

-

+

BUS

12V

VMB4PD

L

H

-12V+

BUS

TWISTED

PAIR

(0.5mm )

2

If the module is connected at the start or end of a cable on the VELBUS, place the ‘TERM’ jumper.
Remove the jumper in all other cases.


If different cable wiring topologies (tree, star, loop, ...) are used, place a jumper on the end module of the
longest cable only (e.g. the last control module), NOT on each end point.
Generally, only 2 termination jumpers will be used.

12V Power supply

-

+

L

H

Velbus

+

-

Terminator

1. Connection

If in case of a power failure you desire a backup for the internal clock:
Connect a 9V battery (Use the included cable) .
This is only needed on 1 module (see also page 7).

12V Power supply

-

+

L

H

Velbus

+

-

ENGLISH

4

For connection between the modules, use twisted pair cable (ex. EIB 2x2x0.8mm

2

, UTP 8x0.51mm - CAT5 or other). For long wiring

(>50m) or if a lot of modules ( > 10) are connected to one wire, use minimum 0.5mm² cable
Connect the 12-18Vdc (mind the polarity) and connect the bus wires (mind the polarity). See also the example on page 2.







2. Termination

H

L

-

+

BUS

12V

VMB4PD

L

H

-12V+

BUS

TWISTED

PAIR

(0.5mm )

2

If the module is connected at the start or end of a cable on the VELBUS, place the ‘TERM’ jumper.
Remove the jumper in all other cases.


If different cable wiring topologies (tree, star, loop, ...) are used, place a jumper on the end module of the
longest cable only (e.g. the last control module), NOT on each end point.
Generally, only 2 termination jumpers will be used.

12V Power supply

-

+

L

H

Velbus

+

-

Terminator

1. Connection

If in case of a power failure you desire a backup for the internal clock:
Connect a 9V battery (Use the included cable) .
This is only needed on 1 module (see also page 7).

12V Power supply

-

+

L

H

Velbus

+

-

ENGLISH