Product Overview
Light-duty electric actuator designed for demanding environments and minimal maintenance
UL, CSA, CE certified: achieve peak efficiency with Bray’s smallest electric actuator
Output torque: 300 in-lb (34 Nm) to 18,000 in-lb (2,034 Nm)
Bray combines decades of electric actuator experience with innovative engineering to create the Series 70 electric actuator. The Series 70 features on/off or modulating control and offers more advantages than other actuators, including:
Most units are UL, CSA, and CE certified
Direct connection to terminal board without interference from other components
Simple and unique manual override handwheel system
Lowest profile and lightest weight actuator on the market
Adjustable travel limit cams by finger or screwdriver without interference from other components
High-visibility valve status indication on most units (heartbeat)
Technical Specifications
| Item | Parameter |
|---|---|
| Output Torque | 120/230V: 300 to 18,000 in-lb (34-2034 Nm) 24V: 600 in-lb (68 Nm) 2000 in-lb (226 Nm) 5000 in-lb (565 Nm) |
| Control Options | On/Off: 120/230 VAC plug-in relay board (I.R.B.) 24V: AC/DC controller Modulating: Servo NXT controller Communication Protocol: Servo NXT DeviceNet, EtherNet/IP |
| Voltage | 120, 230 VAC 50/60 Hz, 1-phase 24V: AC/DC |
| Power Source | 24-27VAC or 30-38VDC 70-DNS: VAC: 120 70-NXT: 120/220 VAC 50/60Hz, 24V AC/DC |
| Enclosure Protection | NEMA 4, 4X and IP65, IP67 |
| Input Signal | On/Off: 120/230 VAC 24V: AC/DC Modulating: 4-20 mA 0-10V, 0-5V, 2-10V |
| Mounting | ISO 5211 |
| Motor | 120/230 VAC: Single-phase, reversible, permanent split capacitor motor 24V: Permanent magnet brush DC motor |
| Temperature Range | -20°F (-29°C) to 150°F (+65°C) |
| Switch Options | Standard 2 SPDT mechanical switches Additional auxiliary switches available (up to 6 total) Optional torque switches |
| Certifications | UL, CSA, and CE certified (most 120V models) 70-24V: x | CE certified |
| Valve Compatibility | Quarter-turn valves |
Features and Benefits
A Enclosure Protection
Low-profile weather-resistant actuator certified to UL Type 4, 4x and IP65. Die-cast aluminum cover and base with polyester powder coating provide excellent corrosion, wear, impact, and UV resistance.
B High-Visibility Position Indicator
Prominent markings and color coding - yellow for open, red for closed - indicate valve position throughout the stroke. The O-ring sealed dome is made of transparent polycarbonate with high impact, heat, chemical, and UV resistance, capable of withstanding corrosive chemical washdown, ensuring excellent corrosion resistance.
C Captured Cover Bolts
The cover is secured to the base with stainless steel captured bolts located outside the sealing area.
D O-Ring Seal Provides Weather Protection
An O-ring seal between the cover and base provides weather-tight sealing to prevent internal corrosion.
E Manual Override
Standard on all models. A clutched manual override prevents handwheel movement when the motor is running. When manual operation is needed, pull the handwheel out to reveal a yellow stripe around the handwheel shaft. This indicates the handwheel is engaged and ready for manual operation.
F Manual Override Switch
Disconnect motor power when operating the handwheel. The manual override operates like a watch crown. To engage the manual override, simply pull the handwheel to its outermost position. The yellow stripe provides visual indication of manual override engagement.
G Conduit Entry
Both fittings have NPT or metric threads. One entry is for power supply, the other for control wiring.
H Motor Gear
High-torque starting motor assembly. Allows for quick inspection and maintenance.
I Output Drive
Self-locking worm shaft and worm gear assembly holds the valve in the desired position.
J Mechanical Travel Stop Bolts
Prevent over-travel in the open or close direction during manual operation. Travel stop bolts include lock nuts to prevent loosening, stem packing to prevent water ingress, and shims to allow adjustment between 0° and 90° limit switch settings. Travel stop bolts allow 5° of over-travel.
K Terminal Board
Actuator limit switches are pre-wired to an easily accessible and clearly marked terminal board for convenient customer wiring. The terminal board is located near the two conduit entries with ample space for routing wire leads. An easily accessible green plated ground screw is provided. A wiring diagram is included inside the cover for easy reference.
L Limit Switch Bracket
A simple, secure design firmly holds the limit switch assembly for accurate and repeatable valve position feedback.
M Limit Switch Cams
Bray’s patented cam design includes standard green (open) and red (close) cams adjustable by finger or screwdriver without additional tools. Standard factory setting allows 90° rotation between open and close positions.
N Roller Bearings
Low friction and ensure alignment of the actuator indicator shaft with the cams, providing reliable valve position feedback.
O Oldham Coupler
Corrects any misalignment between the valve and actuator without applying side load to the position indicator shaft assembly.
P Plug-in Relay Board (IRB)
The IRB is included on 120/220 VAC 50/60Hz on/off control versions and prevents control feedback from one actuator to another parallel actuator.
Q Servo-NXT
• Modulating controller: 120, 220, 1-phase 24 VDC • 24V on/off controller • See below for additional details
Built-in EtherNet/IP Support
The Bray Series 70 NXT is the first device with built-in EtherNet/IP connectivity, allowing direct connection to Rockwell PLCs via Ethernet.
Rockwell Studio 5000 Add-on Profile
Bray is the first manufacturer to offer a Rockwell Add-on Profile (AOP) for EtherNet/IP-enabled actuators. This AOP enables customers to seamlessly register and rapidly configure Bray S70 actuators into Rockwell PLCs via Studio5000 software. Customers automatically see I/O data with meaningful and descriptive names.
Fast Ethernet Connection
The Servo NXT control module uses assembly data to set valve position and transmit data directly to Rockwell/Allen-Bradley PLCs via EtherNet/IP protocol for visualization and fault notification to report operating characteristics. Another advantage is that device configuration data is stored in the Logix controller, enabling automatic device configuration upon device replacement.
Diagnostics and Reporting
The Series 70 Servo NXT EtherNet/IP™ control module provides feedback and diagnostic data via TCP/IP, including position, status, alarms, stroke count, motor run time, motor current, stroke time, direction changes, etc., providing enhanced diagnostic capability and predictive maintenance through degradation detection.
Heartbeat Health Monitor
The Servo NXT control module provides real-time status and health through a built-in backlit flashing Bray logo.
Excellent Value
Servo NXT EtherNet/IP reduces the complexity of Series 70 actuator installation and commissioning. Direct Ethernet connection to the Series 70 Servo NXT eliminates the need for expensive communication protocol converters and gateways. With the Rockwell Add-on Profile (AOP), the Series 70 actuator can also be quickly configured into Rockwell PLCs via Rockwell Studio5000 software.