Product Documentation
Supply Terminal Connections
With analog inputs and outputs, the neutral must always be connected to the
terminal associated with that I/O point.
All supply terminals are connected in the I/O module, not in the terminal base.
24 Vac supply terminals are fused for Class 2 (24 Vac at 50/60 Hz) through the
P1 BIM, TX-I/O Power Supply, or Bus Connection Module.
24 Vdc supply terminals are connected in the I/O module, not in the terminal
base. They are overload protected in the P1 BIM or Bus Connection Module, and
fused (resettable) in the TX-I/O Power Supply.
Configurable Points (Universal and Super Universal modules)
Universal I/O modules provide 8 points, which can be separately configured as
DIs, AIs, or AOs (AIs and AOs are voltage only).
Super Universal I/O modules provide 8 points, which can be separately
configured as DIs, AIs, or AOs. 4 to 20 mA current handling capability is available
on points 1 through 4 (AIs only) and points 5 through 8 (AIs or AOs).
Digital Input Grounding Connections
The neutral of a digital input (on Digital Input, Universal and Super Universal
modules) can be connected to any neutral terminal on the same module. Several
digital inputs can also share a neutral terminal on the same module.
Digital Output Common Connections
Digital output common is isolated for each relay and must be externally wired to
other DO common if needed.
Class 1 and Class 2 Wiring Separation
Caution:
UL Listings require that NEC Class I and Class II wiring be kept
separate from each other. Use separate conduit and cable tie bars
to separate Class I DO wires from all other Class II wiring.
Product Documentation
For additional wiring and CE compliance information, see the APOGEE Wiring
Guidelines for Field Panels and Equipment Controllers (125-3002).
The following Installation Instructions are also available online: TX-I/O P1 Bus
Interface Module (553-140), TX-I/O I/O Module (553-141), and TX-I/O Power
Supply and Bus Connection Module (553-142).
Siemens Building Technologies, Inc 7
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