P1 Bus Interface Module, TX-I/O Power Supply, and Bus Connection Module
24V24V
24V
CS CD
CS CD
24V
T
CS CD
24V
T
CS CD
4
5,6
24 Vac In
Common
+ 24 Vdc
Data
+ 24 Vdc
Data
+ 24 Vdc
Data
24 Vac In
Common
+ 24 Vdc
Data
5
TXIO0030R1
Bus Connection Module
TXS1.EF4
TX-I/O Power Supply
TXS1.12F4
LED Indicators
LED Indication
(1) RUN (green)
The LED lights after power-up tests OK and the BIM operating system is
running. Flashing (P1 BIM only) indicates that the address key is not
inserted or is not being read correctly.
(2) FLT (red)
For future use.
(3) TX, RX (yellow)
Light up at an irregular rate to indicate communication on the bus.
(4) Module supply/field supply
voltage (green)
24 Vdc (conductor CS, measured
on bus)
ON 24 Vac bus voltage is in the acceptable range.
OFF 24 Vac bus voltage is outside the acceptable range, indicating
insufficient or shorted supply of the I/O bus,
or one of the AC/DV converters is faulty.
(5) Fuse LED for 24 Vac supply
peripheral devices – TXS1.EF4
only
ON 24 Vac (supply voltage) input present; fuse is intact.
OFF No 24 Vac (supply voltage) input,
or fuse is blown.
(6) Fuse-LED for field supply
voltage (V
) – TXS1.EF10 only
ON V
(field supply voltage) input present; fuse is intact.
OFF No V (field supply voltage) input,
or fuse is blown.
Siemens Building Technologies, Inc 13
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