Prolon C1050 Series Quick start guide

HARDWARE GUIDE
Rooftop Controller C1050 Series
Specifications and Operational Guide
REV. 7.3.0
PL-HRDW-RTU-C1050-C/F-EN
www.proloncontrols.com |[e-mail]
17 510, rue Charles, Suite 100, Mirabel, QC, J7J 1X9

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Table of Contents
General Information ....................................................................................................................................................... 4
PL-C1050 Basic Rooftop Controller...............................................................................................................................................................4
Description............................................................................................................................................................................................................4
General Behaviour..............................................................................................................................................................................................4
Operating Sequence ....................................................................................................................................................... 5
General...................................................................................................................................................................................................................5
Occupied Mode...................................................................................................................................................................................................5
Unoccupied Mode..............................................................................................................................................................................................5
Components .................................................................................................................................................................... 6
Component Identification...............................................................................................................................................................................6
LEDs .........................................................................................................................................................................................................................7
Address Configuration for Networking......................................................................................................................................................7
Input and Output Identification....................................................................................................................................................................8
Inputs ............................................................................................................................................................................... 9
Analog Input.........................................................................................................................................................................................................9
Temperature Sensors ........................................................................................................................................................................................9
Occupancy Mode (Night Setback) ............................................................................................................................................................ 10
Proof of Fan........................................................................................................................................................................................................ 10
Outputs ...........................................................................................................................................................................11
Output Specifications .....................................................................................................................................................................................11
Typical Connection of the Triac Outputs 1 through 4.........................................................................................................................12
Typical Connection of Output #5................................................................................................................................................................12
DMUX-4J Connection on Output 2 for Stage 3 or 4 Cooling............................................................................................................13
PTA2 Connection on Output 2 for Analog Cooling..............................................................................................................................14
Power Source & Network .............................................................................................................................................. 15
Power Source .....................................................................................................................................................................................................15
Network Communication..............................................................................................................................................................................15
Technical Specifications ............................................................................................................................................... 16
Compliance .....................................................................................................................................................................17
FCC User Information ......................................................................................................................................................................................17
Industry Canada ...............................................................................................................................................................................................17
Overall Dimensions....................................................................................................................................................... 18

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Table of Figures
Figure 1 - Component Identification..................................................................................................................................................................6
Figure 2 - LEDs Identification................................................................................................................................................................................7
Figure 3 - Addressing Dipswitches......................................................................................................................................................................7
Figure 4 - Input and Output Identification .......................................................................................................................................................8
Figure 5 - Analog input ...........................................................................................................................................................................................9
Figure 6 - Connecting the Sensors.......................................................................................................................................................................9
Figure 7 - Night Setback Contact Conection................................................................................................................................................. 10
Figure 8 - Connecting the Proof of Fan Contact to the Controller ........................................................................................................ 10
Figure 9 - Conection of Outputs 3 and 4 .........................................................................................................................................................12
Figure 10 - Connecting the Analog Output (External Power).................................................................................................................12
Figure 11 - Connecting the DMUX-4J (Powered by C1050).......................................................................................................................13
Figure 12 - Connecting the PTA2 (Powered by C1050) ...............................................................................................................................14
Figure 13 - Connecting the 24VAC Power Source.........................................................................................................................................15
Figure 14 - Connecting to the Network............................................................................................................................................................15
Figure 15 - C1050 Size Diagram..........................................................................................................................................................................18

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General Information
Description
The Prolon C1050 Basic Rooftop is a microprocessor-based controller designed to operate rooftops or other mechanical
HVAC systems. It acts as a master when used on a network with other Prolon zone controllers.
General Behaviour
Although fully programmable, the Prolon C1050 Basic Rooftop controller uses pre-established control sequences or
’’profiles’’ to operate specific HVAC equipment with dedicated output functions. Those can be fully optimized to obtain
the best results for each type of system. Numerous parameters enable the modification or fine tuning of the fan, the
cooling outputs, the action of the heating outputs (On-or-Off / pulsed / modulating), the proportional bands, integration
times, differentials, operational ranges, setpoints and a whole range of limits and safeguards. The various programming
options also allow the user to modify the unoccupied mode settings, morning warm-up and supply air pre-heating
sequences as well as each zone weight and network demand control strategy best suited for the building space it is
controlling. All these parameters can be accessed by using the Prolon Focus software.
PL-C1050 Basic Rooftop Controller

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General
The Prolon C1050 Basic Rooftop controller receives readings from three temperature sensors located outside, in the re-
turn duct and in the supply duct. Also, as a Master device, it receives data from the zone controllers sent on the network
bus. A dry contact originating from an external timer signals the occupancy status (optional) to the Master. The controller
then analyzes all the data and demands sent by the zones and commands the appropriate outputs to respond accordin-
gly, within parameters set by the temperature sensors and other safety limits. The Master sends back information on its
network such as supply air temperature, occupancy status and other relevant data for the zone controllers to use.
Occupied Mode
The controller operates the fan. When there is a cooling demand from the zones, the Rooftop controller will activate the
cooling outputs as long as all temperature limits, delays and other related parameters are respected. Once the demand
is satisfied, the outputs are deactivated within the prescribed minimum on/off time delays.
When there is a heating demand from the zones, the Rooftop controller will activate the heating outputs as long as all
temperature limits, delays and other related parameters are respected. Once the demand is satisfied, the outputs are
deactivated within the prescribed minimum on/off time delays.
When there is no cooling or heating demand from the zones, only the fan is enabled. If the heating equipment permits,
a supply air pre-heating sequence may be enabled. This allows cold mixed air to be heated to a more comfortable level
for subsequent use by the zones for ventilation.
Unoccupied Mode
The fan can be configured to operate in intermittent mode. When there is a cooling or heating demand from any single
zone, the Rooftop controller will activate the fan and the cooling outputs as long as all temperature limits, delays and
other related parameter are respected. Once the demand is satisfied, the fan and cooling outputs are deactivated within
the minimum on/off time delays set.
During the unoccupied period, the Rooftop controller can be driven by the highest demand on the network and will
operate the fan and relevant outputs accordingly.
Operating Sequence

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Components
Component Identification
Legend:
A-Analog Input Signal Mode Jumpers
B-Addressing dipswitch
C-Jumpers for terminating and bias resistors for the INT port (see I)
D-Jumpers for terminating and bias resistors for the NET port (see K)
E-SOURCE/SINK dipswitch for Output 4
F-SOURCE/SINK dipswitch for Output 3
G-SOURCE/SINK dipswitch for Output 2
H-SOURCE/SINK dipswitch for Output 1
I-INT port for RS485 communication (terminal block)
J-Alternate terminal blocks for 24 VAC (provides power to an optional digital sensor)
K-NET port for RS485 communication (terminal block)
L-Inputs (4 total)
M-Terminal Blocks for Outputs 1 to 5
N-Terminal Blocks for 24 VAC
INT
BIAS THERM
DO1
DO2
DO3
DO4
AO
DO124V DO2 DO3 DO4 AO HBEAT STAT
NETREC NETSND INTREC INTSND
UI1
UI2
COM
UI3
DI
-
24VAC
COM
INT
+
B
NET
A
RS485
NET
RS485
INT
NET
BIAS THERM
UI3
UI2
UI1
Figure 1 - Component Identification

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LEDs
Address Configuration for Networking
DO124V DO2 DO3 DO4 AO HBEAT STAT
NETREC NETSND INTREC INTSND
Blue light: Internal 24VDC power source OK
Status light for analog output 5 (Heat #2 / W2)
Status light for triac output 4 (Heat #1 / W1)
Status light for triac output 3 (Cool #2 / Y2)
Status light for triac output 2 (Cool#1 / Y1)
Status light for triac output 1 (Fan)
Red light: Sending to INT port
Figure 2 - LEDs Identification
The C1050 has various LEDs which are linked to different functions and outputs of the controller. Each LED is individually
identified to help the user make a quick visual diagnostic of the controller’s activity and status.
Green light: Reception from INT port
Blue pulsing, indicates that
the CPU is online
Red light: Sending to NET port
Green light: Reception from NET port
A unique address on each controller must be configured by setting the first 7 switches on the addressing dipswitch to
the desired value.
These switches are numbered from 1 to 7 and represent a binary value from 1 to 64 (1, 2, 4, 8, 16, 32, 64 respectively). The
value of each switch that is in the ON position is added together to form the numerical address of the controller.
The example on Figure 3 shows the switches 1, 2 and 4 on the ON position. So the corresponding values are 1, 2 and 8,
giving an address sum of 11. (1+2+8=11)
The Prolon network allows a maximum of 127 addresses, therefore 127 controllers.
Figure 3 - Addressing Dipswitches

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Input and Output Identification
All the inputs and outputs of the C1050 use pluggable screw type terminal blocks with elevator style clamping, which
make connections easier and more secure.
The C1050 Rooftop Controller has two separate communication ports offering the same functionality on each. Both act
as ports for incoming Modbus communications from other Prolon devices or interfaces, such as a Network Controller or
remote computer with Prolon Focus software.
Figure 4 - Input and Output Identification
DO1
DO2
DO3
DO4
AO
DO124V DO2 DO3 DO4 AO HBEAT STAT
NETREC NETSND INTREC INTSND
UI1
UI2
COM
UI3
DI
-
24VAC
COM
INT
+
B
NET
A
RS485
NET
RS485
INT
PL-C1050-RTU PL-C1050-RTUS
PL-C1050-RTUS: Power supply to digital sensor (24 VAC)
External dry contact for night setback or proof of fan
Supply air temperature sensor (10K thermistor)
Common for all the inputs
Return air temperature sensor (10K thermistor)
Outside air temperature sensor (10K thermistor)
Output 5 (analog 0-10VDC) - Preheating / Heat (W2)
Output 4 - Heat (W1)
Output 3 - Cooling (Y2)
Output 2 - Cooling (Y1)
Output 1 - Fan (G)
Controller’s power source / Unit’s R&C terminals (24VAC)
NET Port: Prolon digital temperature
Sensor - OR - Incoming RS485
network communication (Modbus)
NET Port: Outgoing RS485
network communication
to zones (Modbus)
INT Port: Prolon digital temperature
sensor - OR - Incoming RS485
network communication (Modbus)
INT Port: Incoming RS485
network communication
(Modbus)

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Inputs
Temperature Sensors
The C1050 Rooftop controller has three analog inputs that monitor outside air, return air and supply air temperatures and
will integrate these readings into its control sequence. The sensors used are standard 10k type 3 thermistors that share
a single common connection.
Alternatively, the supply air temperature can be retrieved from a zone controller that has its own supply sensor and be-
longs to the C1050’s network.
The outside air temperature can be also be provided by an alternate source. If a network controller is present on the
network, it can retrieve the outside temperature reading from one controller and distribute it to any other controllers on
the network.
Figure 6 - Connecting the Sensors
Analog Input
Figure 5 - Analog input
The C1050 series controllers are equipped with three general purpose analog inputs. These inputs can be configured to
receive signals of the following types:
• Thermistor (Ω) •0-5V
• 4 -20mA •0-10V
When a thermistor is used, the thermistor must be 10KΩ TYPE 3.
Each C1050 analog input is equipped with a fast-switching barrier diode to protect against surges and short circuits.
By default, the C1050-RTU analog inputs are set up for thermistor mode. The input signal mode can be changed by set-
ting jumpers U1, U2 and U3, situated inside the casing, in the desired position:
JUMPERS
Outside air
sensor
Return air sensor
Supply air sensor
HBEAT STAT
NETREC NETSND INTREC INTSND
UI1
UI2
COM
UI3
DI
-
24VAC
COM
INT
+
B
NET
A
RS485
NET RS485
INT
INT
BIAS THERM
NET
BIAS THERM
UI3
UI2
UI1

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Occupancy Mode (Night Setback)
Proof of Fan
Temperature setback savings can be obtained by using a dry contact originating from an external timer to switch the
controller from occupied to unoccupied mode. The timer contact used must be connected to the "OCC" and the "GND"
terminals. To indicate occupied mode, the contact must be open. To indicate unoccupied mode, the contact must be
closed. As a network Master, the Rooftop controller will then send the occupancy status to all known slaves on his net-
work.
The C1050 has a digital input that can be used to receive the proof of fan signal. Please refer to Figure 8 to see how to
correctly connect it. To indicate proof of fan, the contact must be closed.
Figure 7 - Night Setback Contact Conection
Figure 8 - Connecting the Proof of Fan Contact to the Controller
HBEAT STAT
NETREC NETSND INTREC INTSND
UI1
UI2
COM
UI3
DI
-
24VAC
COM
INT
+
B
NET
A
RS485
NET
RS485
INT
Timer
HBEAT STAT
NETREC NETSND INTREC INTSND
UI1
UI2
COM
UI3
DI
-
24VAC
COM
INT
+
B
NET
A
RS485
NET
RS485
INT
Proof of fan

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Outputs
Output Specifications
The C1050 Basic Rooftop controller contains 5 customizable outputs, 4 being Triac type switch outputs and one being
0-10Vdc analog modulating / pulsed / On-or-Off output. Some outputs are configurable and follow a proportional and
integral algorithm (PI) to ensure precise adjustment of the device. All configurations are performed via the Prolon Focus
software.
An integrated resettable fuse protects each of the outputs of the C1050 against current surges and short circuits. This
protection will cut the current to the output as soon as an overload condition is detected. The fuse is a round, yellow-
coloured PTC that will change to orange and heat up on an overload condition. Once power has been removed from the
C1050, the fuse will cool down and automatically reset. Fix the faulty wiring and you will be able to activate the output
once again.
Output Type Action Application
1Triac source 24VAC,
Max Current: 300 mA On-or-Off Fan
2Triac source 24VAC,
Max Current: 300 mA On-or-Off Cooling (1st Stage)
3Triac source 24VAC,
Max Current: 300 mA On-or-Off Cooling (2nd Stage)
4Triac source 24VAC,
Max Current: 300 mA On-or-Off Heating (1st or 2nd Stage) / Preheat Permission
5
Configurable Analog Output:
- 0 to 10 VDC
- 2 to 10 VDC
- 0 to 5 VDC
Max Current: 40 mA
Modulating Proportional /
Pulse /
On-or-Off
Preheating only /
Preheat + Heating /
Heating (1st or 2nd Stage)

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Typical Connection of the Triac Outputs 1 through 4
Typical Connection of Output #5
Figure 10 - Connecting the Analog Output (External Power)
Figure 9 - Conection of Outputs 3 and 4
On the C1050 Rooftop controller, all triac outputs must be set to SOURCE mode because they all share a single source
supply: the equipment’s transformer. All triac outputs have a SOURCE / SINK configuration switch; they must be set to
“SWITCH” (move switch towards terminal blocks). Only the terminal blocks marked 24 VAC are used for each output.
Output 5 is an analog output 0-10 VDC. It can be configured to modulate a 0 to 10 VDC load, to pulse a 0 or 10 VDC Triac
relay or to control a 10 VDC On/Off relay.
(W1)
Equipment Terminal Board
(Y2)
DO3
DO4
AO
DO3 DO4 AO
(+)
SSR
External Load
(-)
DO3
DO4
AO
DO3 DO4 AO

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DMUX-4J Connection on Output 2 for Stage 3 or 4 Cooling
When 3 or 4 stages of cooling are required, the C1050 Rooftop controller must be equipped with a DMUX-4J. The DMUX-
4J input is only connected to Output 2 on the C1050 Rooftop controller. The DMUX-4J must be configured to “Sequenced
Relay Control” with a 1 second pulse resolution. The “Triac Input Selection” jumper must be set to normal signal input
and the “Power Type Selection” jumper must be set to AC power. The DMUX-4J outputs are then connected to the roof-
top unit. Each of the DMUX-4J outputs have connections for “Normally Closed” and “Normally Open” operation, so use
the connection that is compatible with your rooftop unit. For more information on the DMUX-4J, consult the Specifica-
tion Sheet and the Installation Guide for the DMUX-4J.
Figure 11 - Connecting the DMUX-4J (Powered by C1050)
AC DC
J9
AUTO
O
A
J10
TRIAC NORM
OFF ON
MODE
DMUX-4J Jumpers
Y4
Y3
Y2
Y1
G
R
C
NO4
C4
NO3
C3
NO2
C2
NO1
C1
PWR+
DMUX-4J RTU
PWR-
IN+
IN-
DO1
DO2
DO3
DO4
AO
DO124V DO2 DO3 DO4 AO

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PTA2 Connection on Output 2 for Analog Cooling
When analog cooling is required, the C1050 Rooftop controller must be equipped with a PTA2 v.1. The PTA2 input is
connected to Output 2 on the C1050 Rooftop controller. The input pulse range must be set to 0.1-10 sec. For more infor-
mation on the PTA2, consult the Specification Sheet and the Installation Guide for the PTA2.
Figure 12 - Connecting the PTA2 (Powered by C1050)
DO1
DO2
DO3
DO4
AO
DO124V DO2 DO3 DO4 AO
Y
G
R
C
6
1
PTA2 V.1
24 VAC
COM
RTU
2
3
4

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Power Source & Network
Power Source
Network Communication
The C1050 controller is powered by the HVAC equipment’s 24 VAC power supply by connecting the common ("C" wire) to
the "COM" terminal block and the live (‘’R’’ wire) to the "24 VAC" terminal block. The common for all inputs and outputs
is the same as the power source’s common. All output power sources also originate from the controller’s power source.
The Prolon C1050 Rooftop controller is primarily designed to work with Prolon zone controllers. When they are networked
the Rooftop and zone controllers all communicate in real-time. The network connections are made using the network
terminal blocks located on the C1050 controller.
Figure 13 - Connecting the 24VAC Power Source
Figure 14 - Connecting to the Network
DO1
DO124V
( R )
( C )
To HVAC Equipment Terminal (Class 2)
24VAC
HBEAT STAT
NETREC NETSND INTREC INTSND
UI1
UI2
COM
UI3
DI
-
24VAC
COM
INT
+
B
NET
A
RS485
NET
RS485
INT
Towa rd
network

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Technical Specifications
Supply: 24 VAC ±10%, 50/60 Hz, Class 2
Consumption: 2 VA (Consumption), 32 VA (Input)
Inputs: • Outdoor – thermistor 10K
• Return – thermistor 10K
• Supply – thermistor 10K
• External clock or Proof of fan– dry contact
Digital outputs: 4 triac outputs, 10-30 VAC source or sink, 300 mA max (resettable fuse)
Analog output: 1 output 0-10 VDC / 2-10 VDC / 0-5 VDC, 40 mA max (resettable fuse)
Indication lights (LED): State of each output / Communication / Power / State of microprocessor
Microprocessor: PIC18F6722, 8 bits, 40 MHz, 128KB FLASH memory
Casing: Molded ABS, UL94-HB
Communication: Modbus RTU (RS485), up to 127 nodes
Baud rate: 9600, 19200, 38400, 57600, 76800, 115200
Connection: Removable screw-type terminal blocks (16 AWG max)
Dimensions: 6.2" x 5.2" x 2.5" (157 mm x 132 mm x 64 mm)
Weight: 0.85 lbs (0.39 kg)
Environment: -4 to 122 ºF (-20 to 50 ºC) Non-Condensing
Certification: UL916 Energy Management Equipment, CAN/CSA-C22.2, RoHS, FCC part 15: 2012 class B
The performance specifications are nominal and conform to acceptable industry standards. Prolon Inc. will not be liable for
damages resulting from misapplication or misuse of its products.

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Compliance
•FCC Compliant to CFR47, Part 15, Subpart B, Class B
•Industry Canada (IC) Compliant to ICES-003, Issue 5: CAN ICES-3 (B)/NMB-3(B)
•RoHS Directive (2002/95/EC)
FCC User Information
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device
may not cause harmful interference, and (2) this device must accept any interference received, including interference
that may cause undesired operation.
Caution: Any changes or modifications not approved by Prolon can void the user’s authority to operate the equipment.
Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part
15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a resi-
dential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and
used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference
to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged
to try to correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
Industry Canada
This Class (B) digital apparatus meets all the requirements of the Canadian Interference-Causing Equipment regulations.
Cet appareil numérique de la Classe (B) respecte toutes les exigences du Réglement sur le matériel brouilleur du Canada.

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Overall Dimensions
REV. 7.3.0
PL-HRDW-RTU-C1050-C/F-EN
© Copyright 2021 Prolon. All rights reserved.
No part of this document may be photocopied or reproduced by any means, or translated to another language without prior written
consent of Prolon. All specifications are nominal and may change as design improvements are introduced. Prolon shall not be liable for
damages resulting from misapplication or misuse of its products. All trademarks are the property of their respective owners.
5.3"
(135 mm)
6.5"
(165 mm)
2.2"
(55 mm)
Figure 15 - C1050 Size Diagram
DO1
DO2
DO3
DO4
AO
DO124V DO2 DO3 DO4 AO HBEAT STAT
NETREC NETSND INTREC INTSND
UI1
UI2
COM
UI3
DI
-
24VAC
COM
INT
+
B
NET
A
COM
COM
COM
COM
COM