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It provides proportional plus integral control when used as a receiver-controller along with an R500 integral relay.
It provides proportional plus integral control when used as a receiver-controller along with an R500 integral relay.
2341-50x Series Receiver-Controllers are used in pneumatic control systems to provide proportional control of variables such as Temperature, Relative Humidity, Pressure, Differential Pressure (between water lines), Differential Static Pressure (of air), Air Velocity (in ducts), Enthalpy, etc., as sensed by remote pneumatic transmitters. Other pneumatic inputs may be used for special applications.
There are two models: 2341-501, Direct-Acting, and 2341502, Reverse-Acting. Both can receive (but do not require) three inputs: Primary input signal (S) and Secondary (reset) signal input (R), normally received from pneumatic transmitters; and remote control-point adjustment input signal (C), usually received from a remotely-located manual pneumatic gradual switch or a transducer operated by a building automation system.
Both models are designed to be usable as limit-controllers without limit-setpoint drift: 2341-501 as a low-limit controller; 2341-502 as a high-limit controller (assuming the use of direct-acting transmitters). To prevent setpoint drift in limit applications, a built-in "limit valve", located on the rear of the controller, supplies constant main-air pressure (through port C) to the controller's pilot mechanism, even though the changing output pressure of another (primary) controller is connected to the limit-controller's main-air connection (M).
To provide sensitivity, repeatability, linearity and stability over their entire operating range, these controllers utilize a "nozzle and flapper" pilot mechanism, with pneumatic feedback, similar to that used in industrial instruments.
Features
| Control Action | Direct-acting |
| Construction | Glass-filled nylon, steel, stainless steel, brass, neoprene |
| Environment | Ambiant temperature limits: 35 to 140°F (2 to 60°C) |
| Main Air Pressure | Normal: 20 to 22 PSIG (138 to 152 kPa) Maximum: 30 PSIG (207 kPa) |
| Air Consumption | 0.021 SCFM, maximum (at constant output pressure) |
| Air Flow Capacity | 8 scfh (230 SCIM) (0.063 L/s) |
| Connections | Barbed nipples for 1/4" (0.64 cm) outer diameter polyethylene or 5/32" (0.40 cm) inner diameter polyurethane tubing |
| Setpoint | Adjustable: Graduated dial with 0.25 psi divisions, receives (optional) adhesive Setpoint Dial Label, selected to match span of transmitter connected to Port S |
| Throttling Range | Adjustable: 2 to 40% of the primary transmitter's span |
| Authority of Reset Input Signal | Adjustable: 10 to 300% of the primary input transmitter signal |
| Reset Action | Secondary transmitter, connected to Port R, provides reverse-reset of the primary input transmitter's setpoint, that is, a pressure increase to Port R lowers the receiver controller's setpoint. The authority of input R, relative to that of Port S, the primary transmitter and is adjustable from 10 to 300%. *Note: Direct reset may be obtained by using another controller, 2341-502, set at 40% T.R. and 60% Authority, to reverse the output signal of the secondary transmitter from 3 to 15 PSIG, to 15 to 3 PSIG. |
| Control Point Adjustment | A 12 PSIG change, usually received from a remotely located manual pneumatic gradual switch, to the CPA Port (port C), directly and proportionately resets the controller's setpoint 20% (overall) of the primary transmitter's span |
Click on a category to view a selection of compatible accessories with the Schneider Electric 2341-521 Pneumatic Receiver Controller with base, without gauges.
| Control Action | Direct-acting |
| Construction | Glass-filled nylon, steel, stainless steel, brass, neoprene |
| Environment | Ambiant temperature limits: 35 to 140°F (2 to 60°C) |
| Main Air Pressure | Normal: 20 to 22 PSIG (138 to 152 kPa) Maximum: 30 PSIG (207 kPa) |
| Air Consumption | 0.021 SCFM, maximum (at constant output pressure) |
| Air Flow Capacity | 8 scfh (230 SCIM) (0.063 L/s) |
| Connections | Barbed nipples for 1/4" (0.64 cm) outer diameter polyethylene or 5/32" (0.40 cm) inner diameter polyurethane tubing |
| Setpoint | Adjustable: Graduated dial with 0.25 psi divisions, receives (optional) adhesive Setpoint Dial Label, selected to match span of transmitter connected to Port S |
| Throttling Range | Adjustable: 2 to 40% of the primary transmitter's span |
| Authority of Reset Input Signal | Adjustable: 10 to 300% of the primary input transmitter signal |
| Reset Action | Secondary transmitter, connected to Port R, provides reverse-reset of the primary input transmitter's setpoint, that is, a pressure increase to Port R lowers the receiver controller's setpoint. The authority of input R, relative to that of Port S, the primary transmitter and is adjustable from 10 to 300%. *Note: Direct reset may be obtained by using another controller, 2341-502, set at 40% T.R. and 60% Authority, to reverse the output signal of the secondary transmitter from 3 to 15 PSIG, to 15 to 3 PSIG. |
| Control Point Adjustment | A 12 PSIG change, usually received from a remotely located manual pneumatic gradual switch, to the CPA Port (port C), directly and proportionately resets the controller's setpoint 20% (overall) of the primary transmitter's span |
Click on a category to view a selection of compatible accessories with the Schneider Electric 2341-521 Pneumatic Receiver Controller with base, without gauges.
