MODEL 358

PROGRAMMABLE
CONTROLLER / CHARACTERIZER / RETRANSMITTER
ACCEPTS mADC AND VDC ANALOG INPUTS

Download the Delta Controls Model 358 Datasheet 
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DELTA SMART SYSTEM MODEL 358

Features

• Accepts 4 - 20 mA current, DC voltage, or other analog signals from any process variable transmitter
• Provides on/off control of up to six pumps, motors, valves or other devices
• Characterizes input signal with a 20 point programmable curve
• All displayed values and settings are in terms of engineering units
• Includes rotation software for up to six pumps, feeders, or other devices
• Programmable time overrides and relay actuation delays
• Retransmits a linear or characterized signal equivalent to the input signal can include an optional RS—232, 422, or 485 communications port
• Can be programmed remotely as well as interrogated by host computers, PLCs, telemetry systems, etc.
• Integral keypad for local programming
• Sixteen character alphanumeric LCD display scalable to readout in terms of any engineering units
• Six 10 amp SPDT relays
• Isolated 4-20 mADC scalable output
• PID control; proportional, reset, and derivative action to control valve or feeder unit
• Integral DC supply for two-wire transmitter loop power
• NVR memory protection; no batteries
• Programmable anti-tamper feature
• Self-checking and diagnostics are extensive
• Type 4X epoxy/glass enclosure basic; explosionproof optional

System Description

The Delta Controls Type 358 Smart System is a microprocessor based instrument capable of accepting the current or voltage output signal of any process variable transmitter. Using that signal as an input, the Smart System can be programmed to produce alarm action and/or control the start/stop or open/close operation of up to six external devices such as pumps, motors or valves using six 10 amp relays.

The Delta Controls Smart System accepts 4-20 mADC, 0-20 mADC, 0-10 volt DC and 1-5 volt DC and other analog as well as digital input signals. The input signal can be characterized (linearized) using a curve of up to 20 points. Regardless of which input signal range is used, the 358 can retransmit the incoming signal as received or characterized as a 4-20 mADC signal.

Complete multiple pump control software is included to permit rotation of pumps based on first on/first off or programmed time intervals. Up to six pumps can be controlled. If fewer than six pumps, the remaining relays can be used for alarms since any number of relays can be selected for control or alarm functions. Pumps can easily be deleted from rotation when out of service.

RS-232, RS-422 and RS-485 digital communication are offered as options with the Delta Controls Smart System

Typical Applications

• Multiple lift station pump control and rotation
• Flow or pressure control using staging signals to primary movers
• Control of level using a capacitance probe or head pressure sensor
• Water pressure control in tall buildings
• Wastewater treatment and management
• Metering open channel flow using an optional software package
• pH control in tanks, pits, and channels
• Temperature control of cookers, autoclaves, incinerators, heaters, ovens, etc.
• Batch control using weigh cells
• Centrifuge control and alarm of speed

Specifications

• GENERAL TYPE: Microprocessor based.
• POWER REQUIREMENTS: 120 or 240 VAC, 50/60 Hz; 24 VDC optional. Power consumption is 12 watts.
• LOOP POWER SUPPLY: Provides 24 VDC for two or three wire transmitter. Selection is by terminal wiring.
• AMBIENT TEMPERATURE RANGE: -20°F to +160°F (-30 to 70°C).
• ANALOG SIGNAL INPUTS: 4-20 mADC, 0-1 to 0-20 mADC, 1-5 VDC, 0-1 to 0-10 VDC or "RT3" temperature transducer.
• ELECTRONIC ENCLOSURES: Type 4X Hoseproof epoxy/glass standard. Optional Explosionproof + 4X aluminum.
• ANALOG OUTPUT: 4-20 mADC isolated, 1,000 ohms maximum. Better than 0.001 (12 bit) resolution.
• DIGITAL INTERFACE: Optional RS-232C, RS-422 or RS-485.
• PROGRAM DATA ENTRY: Integral mounted keypad, 20 keys including function, enter, scroll up/down, and clear entry keys is basic.
• PROGRAM PARAMETERS: Display scaling, dampening, characterization of input signal (up to 20 points), relay set points, relay direct or reverse action, pump control rotation (lead/lag or alternate for up to 6 pumps), baud rate for digital output, lockout code, and system reset.
• INDICATION: Board mounted sixteen character, alphanumeric LCD display. Failure mode LED alarm.
• MEMORY PROTECTION: Nonvolatile RAM. Maintains stored data for more than 5 years following loss of supply power. No need to replace batteries and reprogram.
• CONTROL/ALARM RELAYS: Six SPDT, 10 Amp @ 250 VAC standard; DPDT is optional.
• WIRING CONNECTIONS: Clamp type terminal strips provided for wire sizes up to 12 gage (2.1mm).

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