Communication, Baud Rate Settings & Wiring Info
Before Applying Power
In order to have a trouble free start-up, it is important to follow a few
simple procedures. Before applying power for the first time, it is very
important to correctly address the controller and run through a few
simple checks.
System Settings
Stand Alone Operation
The GPC-XP has an on-board CommLink that is used during Stand-
Alone Operation. When configured for Stand-Alone operation, a
computer running Prism 2 software can be connected directly to the
USB port located at the bottom of the GPC-XP for programming and
monitoring. In order to operate in Stand-Alone Mode, two things need
to be set. First, both CommLink Jumpers found on the upper left-hand
side of the board need to be set to ON. See
Figure 4
for details. Second,
the Baud Rate is determined by setting ADDRESS Dipswitch 7 to ON
and Dipswitch 8 to OFF. See
Figure 5
for details.
Network Operation
The GPC-XP can be configured for connection to a networked system
that has an external CommLink. In this case, the on-board CommLink
would not be used. For this configuration, two things need to be set.
First, both CommLink Jumpers found on the upper left-hand side of the
board need to be set to OFF. See
Figure 4
for details. Second, the Baud
Rate determined by setting ADDRESS Dipswitches 7 and 8 needs to
be set to OFF/OFF if using a CommLink IV and to OFF/ON if using a
CommLink 5. See
Figure 5
for details.
Controller Addressing & Baud Rate
The GPC-XP Controller is equipped with address switches. When using
Prism 2 to program and configure the GPC-XP Controller, you would
enter this address to communicate with the controller. When the system
is to be connected to other HVAC unit controllers on a communication
loop, each controller’s address switch must be set with a unique address
between 1 and 59.
Settings
Important Wiring Considerations
Please read carefully and apply the following information when wiring
the GPC-XP Controller:
1. To operate the GPC-XP Controller, you must connect power to
the 24 VAC input terminal block.
2. Check all wiring leads at the terminal block for tightness.
Be sure that wire strands do not stick out and touch adjacent
terminals. Confirm that all sensors required for your system are
mounted in the appropriate location and wired into the correct
terminals. See
Figure 6 & 7
for wiring connections drawings.
Environmental Requirements
The GPC-XP Controller needs to be installed in an environment that can
maintain a temperature range between -30°F and 150°F and not exceed
90% RH levels (non-condensing).
Mounting
The GPC-XP Controller is housed in a plastic enclosure. It is designed
to be mounted by using the 3 mounting holes in the enclosure base. It is
important to mount the module in a location that is free from extreme high
or low temperatures, moisture, dust, and dirt. Be careful not to damage
the electronic components when mounting the module.
Power Supply
The GPC-XP Controller requires a 24 VAC power connection with a
minimum rating of 8 VA.
WARNING:
Observe polarity! All boards must be wired
GND-to-GND and 24 VAC-to-VAC. Failure to
observe polarity could result in damage to the
boards.
Figure 3 GPC-XP Controller Dimensions
10
WSHP Loop Controller
GPC-XP Guide
