TX-I/O Power Supply and Bus Modules
TX-I/O Power Supply and Bus Modules
The TX-I/O Power Supply and Bus Connection Module provide power and
communications for the TX-I/O modules.
Function
Product
TX-I/O Bus
Communication
24 Vdc power
24 Vac power
TX-I/O Power Supply
(TXS1.12F4)
1
Signal pass-thru 28.8W at 1.2 A - Output fused at 4A
- NEC Class 2
96 VA max. (Output)
- Class 1 Power Limited
150 VA max. (Input)
Bus Connection Module
(TXS1.EF4)
1
Signal pass-thru Pass-thru
- Output fused at 4A
- NEC Class 2
96 VA max. (Output and
Input)
1)
May be used for Smoke Control installations with Smoke Control Listed Enclosures and
transformers or service boxes. The line to the 24 Vac input transformer must not exceed 1000 VA.
NEC Class 2 wiring may be used up to 96 VA, and NEC Class 1 Power Limited wiring must be
used above 96 VA and up to 1000 VA.
TX-I/O Power Supply Overview
The TX-I/O Power Supply bridges communication and power from one DIN rail to
another and generates 28.8 W (1.2A at 24 Vdc) to power TX-I/O modules and
peripheral devices.
An LED provides an indication of 24 Vdc on the TX-I/O bus.
Up to 4 TX-I/O Power Supplies can be operated in parallel, with a maximum of two
per DIN rail.
It can be located within a row of TX-I/O modules or at the beginning of a new DIN
rail.
The TX-I/O Power Supply performs the following functions:
Transfers 24 Vac at 4A to power TX-I/O modules and peripheral devices.
Provides an input point for 24 Vac to power additional peripheral devices.
‒ Isolates the 24 Vac peripheral device supply in case of overload or short-circuit.
‒ The replaceable AC fuse can be accessed from an installed module.
‒ Indicates the AC fuse status with an LED for easy diagnostics.
Routes the bus signal between DIN rails (+24 Vdc Communication Supply (CS)
and Communication Data (CD) signals).
30
Siemens Industry, Inc.
TALON TX-I/O Modules and Island Bus Technical Reference
588-587
CONFIDENTIAL: For internal use only
4/6/2010