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Command and signaling
TM bell transformers

Technical characteristics
Primary rated voltage Un [V] 230 a.c.
Secondary rated voltage Un [V] 4, 8, 12, 24
Tolerance on secondary voltage [%] +/- 15% (according to standards)
(with load)
Rated frequency [Hz] 50/60
6
Rated power (discontinuous use) [VA] 10, 15, 30, 40
Power loss (off load) [W] <2.5 (TM10, TM15), <3 (TM30, TM40), <1.25 (TM15 ES)
Modules [No.] 2 (TM10, TM15), 3 (TM30, TM40)
TM 15/12
2
Cable section [mm - 2.5 - 14
AWG]
Tightening torque [Nm] 0.5
Protection degree IP 20
Standards IEC/EN 61558-2-8
Approvals

TM fail safe bell transformers
These transformers, with safety extremely-low voltage secondary (SELV), are suitable
for loads that require a discontinuous supply, and in particular doorbells and chimes.
TM 40/12 Fail safe operation and excellent safety are assured thanks to the perfect isolation
and separation between the primary and secondary circuits. In addition, the Energy Saving
TM-ES version allows reducing power losses by 50%.

Maximum Secondary Bbn Order details Price Weight Pack
rated power a voltage rating 8012542 1 piece 1 piece unit
(disccontinuous)
VA V c.a. EAN Type code Order code kg pc.
10 4-8-12 287155 TM10/12 2CSM228715R0802 0.30 6
10 12-24 287254 TM10/24 2CSM228725R0802 0.30 6
15 4-8-12 287353 TM15/12 2CSM228735R0802 0.30 6
15 12-24 287452 TM15/24 2CSM228745R0802 0.30 6
15 4-8-12 285854 TM15/12 ES 2CSM228585R0802 0.30 1
30 4-8-12 287551 TM30/12 2CSM228755R0802 0.45 4
30 12-24 287650 TM30/24 2CSM228765R0802 0.45 4
40 4-8-12 287759 TM40/12 2CSM228775R0802 0.45 4
40 12-24 287858 TM40/24 2CSM228785R0802 0.45 4

 See diagrams below for the RMS power on each secondary output