Electrical ratings:
For audio and telephone risers:
Maximum wire size:
14 AWG twisted pair, shielded
TBM-2 Connections and Ratings
4 - 107
Minimum wire size:
18 AWG twisted pair, shielded
Maximum loop resistance:
20 ohms for all wires
TBM-2 Wiring Diagram (with MMB or PSR)
NOTES
1. All wiring must be in
accordance with
Article 760 of NEC or
the local buidling
codes.
2. For all Audio and
Telephone Risers:
Maximum Loop
Resistance: 20 ohms
Minimum Wire Size:
18 AWG twisted pair,
shielded
Maximum Wire Size:
14 AWG twisted pair,
shielded
3. Input impedance of
AUX IN is 3K ohms,
200mV RMS.
The signal source
must have isolation
using a transformer.
4. The load impedance
for AUX OUT must not
be less than 10K
ohms, 200mV RMS.
The load must have
isolation using a
transformer.
5. SPDT contacts acti-
vate when audio is
present on AUX OUT
jacks based on the
CSG-M selection of
microphone or tele-
phone. Contact
ratings: 0.3A at 24 VDC
If AUX OUT 1 is
microphone, then
AUX OUT 2 is
telephone.
If AUX OUT 1 is
telephone, then AUX
OUT 2 is microphone.
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