BWI Eagle Air-Eagle SR Plus 38P-2D-ESTOP-DC 2.4 GHz RF Receiver

Introduction

The Air-Eagle SR Plus is a 2.4 GHz RF system designed for short-range wireless remote control of electrical apparatus in various industrial applications. It enables systems to comprise multiple receivers and handheld or stationary transmitters to operate hazardous or hard-to-reach equipment from safe, convenient locations. The system supports eight user-selectable frequencies to prevent interference between multiple systems operating in the same area. The receiver features four independent relays, each capable of switching 5 amps at 120VAC or 30VDC. These relays are programmable for momentary or toggle/latching operation and can interface directly with customer equipment or PLCs. The Air-Eagle SR Plus receiver can receive signals from a transmitter up to 600 feet away, with longer ranges achievable using external antennas. It utilizes spread-spectrum technology for enhanced security and reliability. The receiver is designed for failsafe operation, with the transmitter sending a periodic heartbeat signal to monitor the connection. Relays de-energize after a specified timeout period of link-loss or immediately upon activation of an E-stop button.

Safety Warnings

WIRELESS STOP, ASTOP, and E-STOP SYSTEMS: Wireless E-STOP systems should not be considered primary life-saving devices. A hard-wired emergency stop switch must be available and operational when the wireless system is not functioning. Failure to comply can result in serious injury or death to personnel and damage to equipment.

Wireless STOP and ASTOP transmitters are not failsafe emergency stop controls and are not intended for use as life-saving devices. They are designed for wireless control of equipment or vehicle remote operation. Misuse can lead to serious injury or death.

Installation

1. DISCONNECT power from all equipment before proceeding with installation.
2. Mount the receiver in a convenient location.
3. Install relay control wiring to the terminal strip.
4. Attach the rubber duck antenna or a coaxial cable from an external antenna to the connector on the side of the enclosure.
5. Connect the supplied power input cable to an external power source.

Terminal Strip Wiring

Note: Terminals 4 and 6 are not used on this model.

Approvals

Relay Assignment & Modes

Split Relays

In Split Relay mode, STOP relays are ON at power up. Pressing the STOP button turns the corresponding STOP relay OFF. After release, the transmitter must be powered OFF and then ON again to reset and re-energize the STOP relay. If the receiver fails to detect a beacon signal from a logged-in transmitter for 2 seconds, both STOP and LOGIN relays will drop out. To reactivate, the transmitter must be powered OFF and then ON again within range.

Note: If a transmitter goes out of range, it will blink "Out of Range". Pressing the Power/Select button clears this message. To stop monitoring without remote stop protection, power the transmitter OFF while in range; this de-energizes only the LOGIN relay.

Failsafe Relays

In Failsafe Relay mode, all relays are OFF at power up. When a transmitter logs in, both STOP relays energize, and the corresponding LOGIN relay energizes. If a second transmitter logs in, only its LOGIN relay energizes (STOP relays are unaffected). Activating a STOP command from either transmitter immediately de-energizes both STOP relays. After the STOP button is released, all logged-in transmitters must be powered OFF and then ON again to log in.

Options, PAN ID & Frequency Setup

The unit is factory-shipped with SEL1 switches in the open positions, setting Relay Response to Failsafe, allowing reset from the transmitter, Pan ID to 1, and frequency to 1. To change these settings, follow these steps:

1. IMPORTANT: Disconnect power from the unit.
2. Remove the top cover.
3. Select desired options using the tables below.
4. Reattach the cover.
5. Reconnect power to the unit.
6. Programming is complete.

Relay Response to E-STOP Event

System Reset Options

Note: SW3 is not used on this model.

PAN ID Setup

Note: The PAN ID identifier (BWI) will appear on systems that have been uniquely coded. The numbering will remain as shown.

Frequency Setup

Controls & Indicators

The receiver unit features several controls and indicators:

• POWER/TX LED: A dual-color LED that illuminates red during unit boot-up and turns green when boot-up is successful and the unit is ready to operate. If the LED fails to turn green, power cycle the unit (off for 15-20 seconds, then reapply power).
• LED2: Illuminates green when Relay 1 is energized.
• LED3: Illuminates green when Relay 2 is energized.
• LED4: Illuminates green when Relay 3 is energized.
• LED5: Illuminates green when Relay 4 is energized.
• REL1 - REL4: Four SPDT (Single Pole Double Throw) output control relays.
• RF1: RF Module responsible for transmitting and receiving data.

Specifications

*Note: Max range statements are estimates based on a clear line of sight with few interferences. Actual range will vary based on transmitting power, orientation of transmitter and receiver, height of transmitting and receiving antennas, weather conditions, electronic interference, terrain, and physical obstacles, including but not limited to; walls, building structures, trees (foliage), metal objects, and landscape (hills, mountains).

Accessories

Standard Antenna (Included)

• 2.4GHz TNC Portable "Rubber Duck" Antenna (Part #: 49-1201)

Mobile/Base Antennas (Optional)

Used to help achieve maximum range in non-line-of-sight and line-of-sight applications. Contact BWI Eagle for recommendations.

• 2.4GHz Thru-Hole/Bracket Mount Mobile Antenna (Part #: 49-2201)
• 2.4GHz Magnet Mount Mobile Antenna (Part #: 49-2202)
• 2.4GHz Omni Directional Base Antenna (Part #: 49-3201)
• 2.4GHz Yagi Directional Base Antenna (Part #: 49-3202)

High Quality Coax Cable

Used to connect external antennas to the control unit.

• Flex Coax Cable w/Connectors (Available in 5', 15', 25', 30', 40', 60', 80', and 100' lengths) (Part #: 49-4000-XX, where XX = length in feet)

Bulkhead Extension

Used to provide an external antenna connection when mounting the control unit inside another enclosure.

• TNC Male to TNC Bulkhead Cable Assembly (Available in 2', 4', and 7' lengths) (Part #: 49-5004-X-ISO, where X = length in feet)

Dimensions

The receiver unit has the following approximate dimensions:

• Overall Width: 4.80 inches
• Overall Height: 6.30 inches
• Overall Depth: 2.25 inches
• Mounting Surface Width: 4.88 inches
• Mounting Surface Height: 5.50 inches
• Mounting Hole Pattern: Four 0.365" diameter thru holes, spaced 4.80" x 4.80" center-to-center.
• Additional mounting holes: Six 0.200" diameter thru holes.
• Side connections/protrusions: Approximately 0.65" from the edges.

A detailed diagram shows the top and side views with precise measurements for mounting and enclosure features.

Relay Output Wiring

The receiver outputs are dry relay contacts, functioning like SPDT switches. When a relay is de-energized, the N/C (normally closed) contact is connected to the C (common) terminal. When the relay is energized, the N/O (normally open) contact is connected to the C terminal.

E-Stop Wiring Suggestion

Relays can be wired in series with an existing stop circuit or used to provide login signals to other units. The diagram illustrates the connection of Relays 1-4 to terminal blocks, with suggestions for connecting to Unit #1 and Unit #2 login signals.

Normally Open Application with Externally Supplied Voltage

This configuration shows how to control loads using the receiver's relays. Input channels CH.1 and CH.2 are not used on standard receivers.

• Internal Relay - Loads Less Than 5 Amps: Loads up to 5 Amps can be wired directly to the internal relays. Wiring to the N/O contact turns the load ON when the relay is energized. Wiring to the N/C contact turns the load ON when the relay is de-energized. AC or DC voltages can be switched. The diagram shows a load (Lamp, Motor, Solenoid) connected to Relay 1, with the load voltage supplied via AC hot or DC+ and AC neutral or DC ground.
• External Relay - Loads Over 5 Amps: For loads exceeding 5 Amps, an external high-current relay must be used. The diagram demonstrates using the receiver's internal relay to control the coil of an external AC or DC relay. The external relay then switches the higher current load. It is recommended to use a protection diode for DC coils or an MOV for AC coils to mitigate inductive EMI noise. The diagram shows a load (Lamp, Motor, Solenoid) connected to an external relay, controlled by the receiver's internal relay.

Note: Wiring configurations are examples; application-specific wiring may differ. Consult BWI Eagle or an electrician for assistance.