WattMaster MG331-21-VAVCAV - Manual (Page 24)

Form: WMS-OE310-21-GPC-17Controller-01A.doc
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VAV System
Description
The GPC-17 Controller is used for con-
trolling equipment or processes that can-
not be controlled using standard HVAC
Unit controllers. The WattMaster Prism
computer front end software is used to
interface with the GPC-17 controller func-
tions. The GPC-17 is designed with 6 uni-
versal inputs, 7 binary outputs and 2
analog output. Each input can be config-
ured for use with a Type III-10k ohm
thermistor temperature sensor, 4-20ma
sensor, 0-5 VDC sensor or a N.O. or N.C.
binary contact closure. Sensor reading
values can be selected for the specific
input type, such as, %RH, Deg. F, RPM,
etc.. If a thermistor type temperature sen-
sor is used, a calibration option is avail-
able to offset the actual temperature in
relation to the displayed reading. It also
has one input configures for Duct Static
Pressure and one configured for Building
Pressure. The 7 binary outputs may be
configured to operate based on any of the
8 sensor inputs, outdoor air temperature,
the GPC-17 controller’s internal schedule
or an external schedule. They can also be
configured to use AND/OR logic state-
ments. A Relay Expansion Board can be
connected to the GPC-17 to give it an
extra 8 relay outputs. In addition to the
relay outputs the GPC-17 contains two 0-
10VDC analog outputs which can be configured for simple floating point or PID control. The analog output can
also be configured to operate based on any of the 8 sensor inputs, outdoor air temperature, the GPC-17 control-
ler’s internal schedule or an external schedule. In addition an Analog Output Expansion Board can be connected
to the GPC-17, giving it two additional analog outputs.
Mounting
The GPC-17 is provided with an integral backplate for mounting inside of a control enclosure. It is recommended
that the GPC-17 be mounted in the HVAC unit control enclosure, or in a control enclosure in the building equip-
ment room. An optional factory control enclosure for the GPC-17 is available.
OE310-21-GPC
GPC-17 Controller
Technical Data OE310-21-GPC
GPC-17 Controller
Power 24 Volt AC Weight 1.5 lb.
Power Consumption 10 VA Maximum Network Connection RS-485
Operating Temp 10
°
F to 149
°
F Protocol HSI Open Protocol Token Passing
Operating Humidity 90% RH Non-Condensing Communications RS-485 - 9600 Baud
Inputs: Outputs:
Types Allowed Type III-10kohm sensors Relay Qty. 7
4-20ma sensors Relay Power Rating (2 Amp @ 24 VAC)
N.O. Binary Contact Analog Output Qty. 2
N.C. Binary Contact Analog Output Signal 0-10 VDC
Total Inputs Available 8
Three Year Warranty WattMaster reserves the right to change specifications without notice
EPROM
RAM
PAL
PIN 1 PIN 1
PIN 1 PIN 1
CPU
+V
+V
1
3
4
5
6
7
8
G
G
2
ANALOG
INPUTS
GND SIG +5V
ANALOG
OUTPUTS
A1
A2
G
9.00
8.25
7.63
7.13
1.00