Maximum quantity of UCMs per BMTX BCU
BMTX-SVN01C-EN 33
Table 5. UCM types and quantities that can be linked to the BMTX BCU
Communication
link type
UCM object
Maximum
quantity of
UCMs/link
Maximum
quantity of
UCMs/BMTX
Isolated
Comm3
CSC 20 20
LCP* 8* 8*
PCM 30 30
RTA-RTW 10 10
Scroll chiller (CGA/CGW/CGAF)
10
†
10
TCM 60 60
Trane Europe chiller 10 10
CCP 6 6
Voyager 32 32
Comm4 Horizon absorption chiller 10 10
IntelliPak 20 20
TUC 64 128
UCP2 10 10
UPCM 10 10
VAV II/III/IV 63 126
VAV wireless receiver 8 8
Voyager 32 32
Comm5 Tracer Loop Controller 1 1
Discharge Air Controller
(DAC)**
20 20
Tracer MP580 and Tracer
MP581 controllers
20 20
Space Comfort Controller
(SCC)**
120
‡
120
‡
Generic LonTalk
®
device (GLD)
40 40
Chiller (Comm5) 10 10
* Requires an LCP Supervisor on each link (where LCPs are connected) to act as an
interface/translator.
†
Some models of CGAF chillers are currently limited to addresses 49–54, which limits
the maximum number of devices per link to 6.
‡
A maximum of 60 devices per link can be accommodated. With a repeater, the maxi-
mum number is increased to 120.
** For a complete list of controllers, see “Comm5 UCMs” on page 56.
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