Velleman VMB1TC - Manual (Page 14)

14 VMB1TC Temperature controller manual – rev 5.0
Terminator
Normally only 2 ‘TERM’ terminators must be used in a complete Velbus installation. Usually this will be on one module
inside the distribution box and on the module which is physically located furthest from the distribution box.
On all other modules, the terminator must be removed.
Remark:
In case the wiring contains a lot of branches, still only one terminator is placed on one module inside the distribution box
and one on the module which is physically located furthest from the distribution box. When communication errors occur,
an additional terminator can be used at the end of another branch. However, the number of terminators should be limited
as more terminators place a heavy load on the bus.
Addressing
Every module on the Velbus system must have its own unique address.
On modules with a rotary switch e.g. the temperature sensor VMB1TS and the relay module VMB4RY the address is set
using the ‘ADDR’ rotary switch (also refer to the manual of the relevant module).
The address of the temperature controller is set via a menu (see § ‘configuration of the temperature controller’ below).
These addresses may not be altered afterwards.
Allocate the relay channels
Every temperature sensor module VMB1TS can steer a relay channel to:
• open the valve that provides hot water to the radiator
• switch on the fan of a convector to speed up heating (when the difference between desired temperature and room
temperature is too high)
• set the boiler in day mode
• switch on the air-conditioning
• switch on the circulation pump (when on of the valves is open)
• generate an alarm at low room temperature (heating system down)
• generate an alarm at high room temperature (valve fails to close)
Every relay channel that is steered by a temperature sensor must be placed in instant control, meaning that the TIME1
and MODE/TIME2 rotary switches of the channel on the relay module must be set to position ‘0’.
The easiest way to allocate those relay channels is by using the Velbus link software via a PC connected to a Velbus
interface (VMB1USB, VMB1RS or VMBRSUSB).
However, it is also possible without the aid of a computer (see manual of the temperature sensor module VMB1TS).
To set up the previous example of a heating system, use following procedures.