Other UCMs or types of UCM may be connected for interfacing to
Honeywell Smartfit, C-Bus or EIB (European Interface Bus). These
other UCMs should be set to higher-numbered Ids, up to 8. UCM Ids
should be sequential, i.e. there should not be any missing ID
numbers, i.e. 1,2,3,4,. and not 1,3,5,7,.
If the ID is changed while power is on, RESET the UCM by pressing
the RESET switch SW1 on the UCM.
Make sure that no other UCM is set as ID=1 in the system,
otherwise there will be a conflict which will prevent proper
Number of UCMs
The Number of UCMs in Comfigurator > Modules and Settings is set
to 1 by default. If there are more than 1 UCM in the system, enter
the number of UCMs. This can also be done in Locations Menu on
the keypad (Engineer Menu 7,4,1)
Always RESET the system after changing the number of UCMs
Connect the UCM to Comfort using the supplied cable with 4-way
IDT connector on both ends. It plugs into JP2 or JP2A on the UCM
and J15 on Comfort. This supplied cable can be used for short runs
(about 1 meter). If the UCM is located further from the Comfort
panel, up to 100 meters, use a cable with 3 twisted pairs. 12V/GND,
KA/KB are to be paired with one pair as spare. Shielding is not
necessary. The UCM may also be connected from the SEM
modules. Ensure that polarity is correct as this is a common cause
of problems with communications.
It is not necessary to switch off power to Comfort before plugging in
the UCM connections. The UCM is often connected in order to
download a configuration using Comfigurator.
The UCM is connected to the PC serial port via a serial cable with a
9 way male D connector on one end and a 9 way female D
connector on the other end (supplied). The best position for the
UCM is near or next to the PC. This is because RS485 is a balanced
line and is able to be run much longer distances without signal
corruption than the RS232 signal cable. Locate an unused serial
port on the PC and plug in the end with the female D connector.
Older PCs may have 25 way connectors for the serial port in which
case a 9 way male to 25 way female adapter (available from
computer shops) is needed.
Universal Communications Module