Full Gauge Controls PCT-3000 plus Manual

PCT-3000 plus
DIGITAL PRESSURE CONTROLLER
FOR COOLING PLANTS
Ver.01
1 - DESCRIPTION
The PCT-3000 plus is a pressure controller for refrigeration plants that require control in their suction and discharge stages. With up to four
internal pressure switches, it allows controlling the following types of installations:
- 1 suction and 1 discharge
- 2 suction and 1 discharge
- 3 suctions and 1 discharge
- 2 suctions and 2 independent discharges
The PCT-3000 plus has 26 digital outputs (relay), 4 analogue outputs (0 ~ 10Vdc), 5 digital inputs (dry contact), 4 pressure inputs (4 ~ 20mA)
and 6 temperature inputs. The number of outputs for each pressure switch can be freely configured among the 26 digital outputs, while the analogue
outputs are unique to each one. The four last digital outputs can be configured to work both as control stage and as alarm output.
In addition to the pressure inputs, each internal pressure switch of the PCT-3000 plus uses one temperature input. This input can be used for
monitoring the temperature of the gas lines and thus for activating low and high temperature alarms. All pressure switches have an internal alarm
interlocking in the controller, in addition to a fully configurable reset system.
In addition to the four temperature inputs the PCT-3000 plus also has two additional inputs. This two additional inputs are associated to the
discharge pressure switch and allows monitoring and controlling the fluid's condensation temperature.
The five dry contact digital inputs can be used to detect external alarms and to select the day / night setpoint. Each of these inputs can be associated
with one or more internal pressure switches of the PCT-3000 plus.
2 - APPLICATION
To be applied in complex refrigeration process control, used in compressor bank(s) (suction) and in the fan bank (discharge).
3 - TECHNICAL SPECIFICATIONS
- Power Supply: 90~264Vac (50/60Hz)
- Control Pressure: 0 to 100 psi / 0 to 6.9 bar (using the SB69-100A transducer)
0 to 500 psi / 0 to 34.4 bar (using the SB69-500A transducer)
- Pressure Resolution: 1 psi / 0.1 bar
- Control Temperature: -50 a 150°C / -58 a 302°F
- Temperature Resolution: 0.1°C between -10 and 100°C and 1°C in the rest of the range
1°F in all range
- Maximum current per digital output: 200mA (250Vac)
- Maximum current per analogue output: 10mA (0 to 10Vdc)
- Dimensions (W x H x D): 220x134x54mm
- Controller operating temperature: 0 to 50°C
- Pressure transducer operating temperature: -40 to 125°C
- Temperature transducer operating temperature: -50 to 150°C
- Operating humidity: 10 to 90% RH (without condensation)
- Pressure inputs: PRES 1 - Pressure in the gas line of pressure switch 1
PRES 2 Pressure in the gas line of pressure switch 2
PRES 3 Pressure in the gas line of pressure switch 3
PRES 4 Pressure in the gas line of pressure switch 4
- Temperature inputs:
TEMP 1, temperature of the gas line of pressure switch 1
TEMP 2 temperature of the gas line of pressure switch 2
TEMP 3 temperature of the gas line of pressure switch 3
TEMP 4 temperature of the gas line of pressure switch 4
TEMP 5 temperature of the liquid discharge line 1
TEMP 6 temperature of the liquid discharge line 2
- Digital inputs: DIG 1 to 5 - dry contact digital inputs
- Control outputs: OUT 1 to 22 - digital control outputs (max 200mA / 250Vac)
OUT 23 to 26 - digital control outputs or alarm output (max 200mA/250Vac)
AN 1 - analogue output for pressure switch 1 (0 to 10Vdc, max 10mA)
AN 2 - analogue output for pressure switch 2 (0 to 10Vdc, max 10mA)
AN 3 - analogue output for pressure switch 3 (0 to 10Vdc, max 10mA)
AN 4 - analogue output for pressure switch 4 (0 to 10Vdc, max 10mA)
4 - NOMENCLATURE ADOPTED IN THE MANUAL
P1 - Internal pressure switch 1 PRES 1 - Pressure input 1
P2 - Internal pressure switch 2 PRES 2 - Pressure input 2
P3 - Internal pressure switch 3 PRES 3 - Pressure input 3
P4 - Internal pressure switch 4 PRES 4 - Pressure input 4
01
TEMP 1 - Temperature input 1
TEMP 2 - Temperature input 2
TEMP 3 - Temperature input 3
TEMP 4 - Temperature input 4
TEMP 5 - Temperature input 5
TEMP 6 - Temperature input 6
®
DIG 1 - Digital input 1
DIG 2 - Digital input 2
DIG 3 - Digital input 3
DIG 4 - Digital input 4
DIG 5 - Digital input 5
AN 1 - analogue output 1
AN 2 - analogue output 2
AN 3 - analogue output 3
AN 4 - analogue output 4
GP1 - Pressure switches group 1
GP2 - Pressure switches group 2
5 - PARTS IDENTIFICATION
LCD Display
Ouputs
Leds
Connection terminals
6 - OPERATING MODES
6.1 - Description
PCT-3000 plus can be configured to operate in four different ways. Each option is called as Operating Mode. The operating modes
establish how many internal pressure switches the controller must operate, as well as which pressure inputs and temperature inputs must be
used. Depending on the operation mode, the interlocking of pressure switch alarms will change according to the groups formed by different
pressure switches (alarm interlocking occurs only between same group pressure switches). The available operating modes are:
One suction and one discharge: In this mode the controller will have two internal pressure switches, being one to control the compressors
(suction) and another one to control the fans (discharge).
The suction pressure switch uses one sensor from 0 to 100 psi to measure the pressure in the gas line together with an optional temperature
sensor.
The discharge pressure switch uses one sensor from 0 to 500 psi to measure the pressure in the gas line together with an optional
temperature sensor. The discharge pressure switch has an additional option for using a second temperature sensor to control the
condensation temperature of the refrigerant fluid.
Two suctions and one discharge: In this mode the controller will have three internal pressure switches, being two to control the
compressors (suction 1 and suction 2) and another one to control the fans (discharge).
Each suction pressure switch uses one sensor from 0 to 100 psi to measure the pressure in the gas line together with an optional temperature
sensor.
The discharge pressure switch uses one sensor from 0 to 500 psi to measure the pressure in the gas line together with an optional
temperature sensor. The discharge pressure switch has an additional option for using a second temperature sensor to control the
condensation temperature of the refrigerant fluid.
Three suctions and one discharge: n this mode, the controller will have 4 internal switches, 3 of which control the compressors (suction 1,
suction 2 and suction 3) and the other controls the fans (discharge).
Each suction pressure switch will use a 0-100 psi sensor to measure the pressure in the gas line, along with an optional temperature sensor.
The discharge pressure switch will use a 0-500 psi sensor to measure the pressure in the gas line, along with an optional temperature sensor.
S1 - Suction 1
S2 - Suction 2
S3 - Suction3
Suc1 - Suction 1
Suc2 - Suction 2
Suc3 - Suction 3
D1 - Discharge 1
D2 - Discharge 2
Desc1 - Discharge 1
Desc2 - Discharge 2
OUT X - Digital output X (that X can be 1 to 26)
Display Leds
keyboard
-Activate the main temporary display
-Exit the secondary display (quick press)
-Reset the secondary display value (long press)
-Confirm / advance
-Secondary alarm display
-Next pressure switch
-Cancel / back
-Secondary hourmeter display
-Previous pressure switch
-Increment value
-Secondary minimum and maximum display
-Next item
-Decrement value
-Secondary general information display
-Previous item
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