Data Sheet for Product

Technical Specification Sheet
Document No. 149-493
February 20, 2018
Siemens Industry, Inc. Page 1 of 2
Hand-Off-Auto (HOA) Accessory
for PXC Compact Controller
Figure 1. PXA8-M.
Figure 2. PXA16-M/ PXA16-MR.
The HOA module is available as an upgrade for use
with Compact Series field panels to provide additional
capabilities. The HOA module replaces the PXC
Compact covers with new covers equipped with
manual override switches and LEDs for visual
feedback at the controller. The manual override
switches enable Digital outputs to be manually placed
into HAND, ON/OFF, or AUTO control. Analog outputs
can be placed into AUTO and ten manual control
positions. LEDs on the module provide override status
and I/O status.
Features
• Hot Swappable - The module can be installed or
removed without powering down the controller
and interrupting facility operations.
• Plug and Play - Upon connection of HOA
module to the host PXC Compact, the device is
recognized and its switches are automatically
assigned to the controller’s fixed Digital Output
and fixed Analog Output points.
• User Configurability - User can override the
default switch assignment, and customize the
switches to their desired configuration.
• Same look and feel as Siemens TX-I/O
technology.
Hardware Compatibility
The HOA module is available for use on all Siemens
PX Compact series controllers. Serial communication
is made by either direct connect or through the use of
a serial HMI cable.
Disposal
The devices are considered electrical and
electronic equipment for disposal in terms of the
applicable European Directive and may not be
disposed of as domestic garbage.
• Dispose of the devices through channels
provided for this purpose.
• Comply with all local and currently applicable
laws and regulations.