DCY-2057 Dual Pressure Controller.
The design of DCY-2057 Dual Pressure Controllers is characterized by high reliability and precision, electrical noise and EMI immunity, besides well elaborated technical manual. 
These features make them ideal for industrial applications in Instrumentation and Process Control.

They have an extruded aluminum case and use the best origin components and parts, proven by rigorous tests and specified according to the strictest worldwide norms. 
One or two pressure inputs; gage or absolute pressure, including vacuum.
Ranges: 0 to 10”H2O, 1psi, 5psi, 15psi, 30psi, 100psi, 250psi, 500psi and 1000psi gage or absolute pressure, including vacuum. 
When in single pressure version, they offer one standard universal input that can be 4-20mA, 0-55mV,
1-5Vdc, 0-10Vdc, 0-55mVdc, thermocouples and RTD; also standard is the 24Vdc power supply for
two-wire transmitter. Available for use with air and inert gases or sealed for fluids compatible with 316L stainless steel.

• Reduced dimensions, large control capacity performing the functions:
- Auto-tune. On-Off, P-PI-PD-PID and Cascade Control.
- Time-proportioning. Remote set-point.
- Programmable set-point up to 10 segments.
- Auto-manual station.
• Many optional modules are available
- Up to two analog output modules of 4-20mA, 1-5Vdc and 0-10Vdc. Up to three SPDT and SPST relay alarm modules.
- Water-proof front-panel.
- RS-232 or RS-422/485 communication.
• Its robust construction makes it tough enough for the most hostile environment. Power supply from 90 to 240Vac, 50/60Hz or dc levels.
• High accuracy. Linearization of RTD, thermocouple and also square root extraction.
• Fully configurable by front-panel push-buttons. Configuration stored in non-volatile memory.

Power supply is universal and can be connected from 90 to 240Vac or dc levels when specified. 
The controllers were projected on modularity and flexibility concepts. 
The user can turn a single loop controller into a dual loop one, having a control output variety as relay, open collector, time proportioning, voltage 1-5Vdc, 0-10Vdc and current 4-20mA. 
They offer up to three alarm cards and a wide variety of controls: On-Off, PID and Cascade.

The DCY controllers have two auto-tune algorithms: start-up or demand (controlled variable is far or near the set-point). Also, they have all standard control features: bumpless auto-manual transference, output saturation, remote set-point, programmable set-point up to 10 segments, reset wind-up prevention.

Inputs
One or two pressure inputs for gage, absolute and vacuum pressures. Ranges from 10”H2O to 1000psi gage pressure. Absolute pressure ranges from 15psi to 1000psi. Vacuum ranges up to 1atm. Ranges up to 15psi used with air and inert gases. From 15psi to 250psi one can use air or fluids compatible with 316L stainless steel. Sealed for use with fluids for ranges above 250psi.
Single pressure version offers auxiliar universal input for thermocouple (J, K, T, E, R or S under ITS-90), 0-55mV, RTD under DIN 43760, 4-20mA, 1-5Vdc and 0-10Vdc selected by user.
Input impedance of 250 ohms for mA, 10 M ohms for 5Vdc and 2 M ohms above 5Vdc.

Control Function
On-Off Control
PID Control
PID Control with Auto-Tune
Cascade Control
Programmable set-point up to 10 segments
Remote set-point

Control Outputs
4-20mA (750 ohms maximum load), 1-5Vdc or 0-10Vdc analog output. Up to two optional modules galvanically isolated to 300Vac from power supply and inputs.
SPST relays rated for 3A at 220Vac.
Logic signal, open collector transistor, 40mA/24Vdc maximum with isolation.

Alarm Outputs
SPST and SPDT relays rated for 3A at 220Vac.
Logic signal, open collector transistor, 40mA/24Vdc maximum with isolation.

Serial Communication
RS-232 or RS-422/485 with 50Vdc isolation.

Indication
Two 14mm red LED's displays with four digits which can be configured together with the decimal point.

Configuration
By front-panel push-buttons, serial communication and internal jumpers.

Sampling Rate
140 ms standard. Half second display update rate.

Accuracy
± 1% of full scale for 10”H2O range.
± 0.1% of full scale for others pressure ranges.
± 0.1% of full scale for TC, RTD, mA, mV and Vdc input.
± 0.5% of full scale for analogic output.

Linearization
± 0.1% of full scale for RTD and ± 0.2% of full scale for TC.

Square Root Extraction
± 0.5% of reading, for input above 10% of span. Cut-Off programmable from 0 to 5%.

Digital Filters
First order digital filters applied to the inputs with time constant from 0.0 to 25.0 seconds.

Cold Junction Compensation
± 2.0°C at range from 0 to 50°C ambient temperature.

2-Wire Transmitter Power Supply
24Vdc/50mA maximum, isolated from output with short circuit protection.

Span Temperature Coefficient at 25°C ambient temperature
± 0.01% of full scale for °C, pressure inputs.
± 0.005% of span for °C, auxiliar input.

Power Supply
90 to 240Vac 50/60Hz, 24Vdc, 12Vdc or other values. 10W nominal. See order code.

Operating Ambient
0 to 50°C temperature and 90% maximum relative humidity.

Dimensions
1/4 DIN (96x96x170mm) HxWxD, (92x92mm) HxW panel cutout.

Weight
1.0kg nominal.

Warranty
One-year warranty.