Nice Apollo O-7251 Post Mount 1050US Slide Gate Operator Details
The Nice Apollo O-7251 is a post-mount slide gate operator from the Nice Apollo 7251 / 7351 slide gate operator family. It is built for select residential, farm, ranch, and light commercial vehicular slide gate applications where a post-mounted cabinet layout is preferred over a pad-mounted operator cabinet.
This operator uses the Nice Apollo 1050US controller platform and is commonly rated for slide gates up to 25 ft long and up to 800 lb when the gate is properly built, level, aligned, and rolling smoothly. The O-7251 should be selected only after confirming the gate condition, mounting style, power plan, battery requirements, chain path, safety-device layout, and package contents.
Find Replacement Parts for O-7251
What This Operator Does
The O-7251 automates one compatible vehicular slide gate using an electromechanical chain-drive slide operator system. The 1050US controller manages the operator logic, programming, receiver input, battery charging behavior, timer functions, monitored safety devices, and accessory connections when installed and set up correctly.
- Automates one compatible vehicular slide gate.
- Uses the post-mount 7251 cabinet configuration.
- Uses the Nice Apollo 1050US controller platform.
- Commonly rated for slide gates up to 25 ft and 800 lb when properly installed and rolling freely.
- Provides approximately 1 ft per second gate travel under typical published specifications.
- Supports AC-charged or solar-charged layouts when the proper battery and charging equipment are selected.
- Supports compatible Nice receiver equipment, access-control devices, loop detectors, exit devices, and monitored safety devices.
- Serves as the post-mount alternative to the related O-7351 pad-mount slide gate operator.
Compatible With
The Nice Apollo O-7251 may be used with select slide gate installations that match the 7251 post-mount layout, 1050US controller platform, gate rating, chain setup, battery system, and monitored entrapment protection requirements. Final compatibility depends on the full site condition, not just the gate size.
- Nice Apollo 7251 post-mount slide gate operator applications.
- Nice Apollo 7251 / 7351 slide gate operator family systems using the 1050US controller platform.
- Single residential slide gates up to 25 ft when properly installed and free rolling.
- Single slide gates up to 800 lb when properly installed and free rolling.
- Residential, farm, ranch, and select light commercial slide gate installations within rating.
- Post-mount slide gate installations where the operator cabinet and post layout are correct.
- Installations using #40 roller chain where the chain path and chain brackets are correct.
- Systems using compatible Nice OXI / OXI/A receiver technology where supplied or selected separately.
- Systems using compatible Nice Inti or Era One transmitters where matched to the receiver.
- Systems using compatible BlueBUS monitored photo eyes and other required monitored entrapment protection devices.
Important Compatibility Warning
Do not select this operator by gate weight alone. Track condition, roller condition, guide alignment, gate stops, chain path, slope, daily cycle count, accessory load, battery capacity, and safety-device layout all affect whether the O-7251 is the correct operator for the site.
The O-7251 is the post-mount version. The related O-7351 is the pad-mount version. Both are part of the 7251 / 7351 slide operator family and use the 1050US controller platform, but the cabinet and mounting layout are different. Do not replace a pad-mount operator with a post-mount operator unless the mounting style is being changed intentionally.
The O-7251 should also be kept separate from Nice Apollo Juno 310 slide operators using the Mercury 310 controller platform and older Apollo 7200 / 7300 slide operator configurations. Similar model names can cause ordering mistakes, so always confirm the operator label, mounting style, control board, and current parts diagram before ordering.
Comparison With Similar Nice Apollo Operators
- O-7251: Post-mount 7251 slide gate operator using the 1050US controller platform.
- O-7351: Related pad-mount 7351 slide gate operator using the same general 7251 / 7351 family, but with a different cabinet layout.
- Juno 310: Nice slide gate operator using the Mercury 310 controller platform. Not the same as the O-7251 1050US platform.
- Apollo 7200 / 7300: Older slide gate operator family. Not automatically interchangeable with the 7251 / 7351 platform.
- 1050US control board only: Replacement controller platform only. Not the same as a complete post-mount slide gate operator.
Similar Parts That Are Not Automatically Interchangeable
- Nice Apollo O-7351 pad-mount slide gate operator.
- Nice Apollo Juno 310 slide gate operator.
- Apollo 7200 and 7300 slide gate operators.
- Nice Apollo swing gate operators such as O-1500, O-1551, and O-3501.
- Barrier gate operators.
- Garage door openers.
- 1050US control board by itself.
- OXI / OXI/A receiver by itself.
- Replacement chain, batteries, chargers, solar panels, and safety devices sold separately.
Not Intended For
- Swing gates.
- Barrier arm gates.
- Overhead garage doors.
- Pedestrian-only gates.
- Pad-mount slide gate installations that require the O-7351 cabinet configuration.
- Nice Apollo Juno 310 slide gate systems using the Mercury 310 controller platform.
- Older Apollo 7200 / 7300 slide gate systems unless a verified replacement path is confirmed.
- Slide gates longer than 25 ft or heavier than 800 lb.
- High-cycle commercial or industrial slide gate applications beyond the operator rating.
- Gates that drag, bind, sag, roll downhill, jump track, or do not move smoothly by hand.
- Installations where required monitored entrapment protection devices are missing, bypassed, or not tested.
Features and Specifications
| Feature / Specification |
Details |
| Brand |
Nice Apollo / Nice HySecurity |
| Part Number |
O-7251 |
| Store Reference |
NICE-O-7251 |
| Product Type |
Post-mount slide gate operator |
| Operator Family |
Nice Apollo 7251 / 7351 slide gate operator family |
| Mounting Style |
Post mount |
| Related Pad-Mount Model |
O-7351 / 7351 pad-mount version |
| Controller Platform |
1050US control board |
| Gate Type |
Vehicular slide gate |
| Application |
Residential, farm, ranch, and select light commercial slide gate automation |
| Maximum Gate Length |
Up to 25 ft when the gate is properly installed and free rolling |
| Maximum Gate Weight |
Up to 800 lb when the gate is properly installed and free rolling |
| Drive Type |
Electromechanical slide gate drive |
| Rate of Travel |
Approximately 1 ft per second, depending on setup and gate condition |
| Operating Voltage |
12VDC battery-powered operator platform |
| Input Voltage Reference |
12VDC to 30VDC input commonly listed for the 7251 / 7351 family; verify current manual before wiring |
| Idle Current |
10 mA commonly listed for the 7251 / 7351 family |
| Accessory Power |
0.3A accessory power commonly listed; observe controller limits |
| Programmable Relays |
Two programmable relays commonly listed for the 1050US platform |
| Receiver |
OXI / OXI/A receiver commonly listed with 7251 / 7351 packages; verify current package contents |
| Chain |
35 ft of #40 roller chain is commonly listed with the 7251 / 7351 package; verify current package contents |
| Battery Requirement |
Battery required for operation; verify whether battery is included or sold separately |
| Battery Sizing Reference |
Common reference: 30Ah to 35Ah battery for AC applications and 70Ah or larger battery for solar applications |
| Charging Options |
AC charger or solar panel may be used when properly selected; confirm whether charging equipment is included |
| Temperature Rating |
Common 7251 / 7351 reference: -40 degrees F to 150 degrees F |
| Enclosure |
Post-mount NEMA 3R powder-coated black enclosure, based on common 7251 specifications |
| Approximate Enclosure Size |
Approximately 22 in W x 22 in H x 15.5 in D, verify current spec sheet before layout work |
| UL Usage Class |
Listed to UL 325 Usage Class I and II when installed correctly with required safety devices |
| Warranty Reference |
Commonly listed with 2-year warranty; verify current warranty terms |
| Safety Requirement |
Slide gate installations require monitored external entrapment protection for open and close direction hazard areas |
Also Known As / Related Part Numbers
- Nice Apollo O-7251
- NICE-O-7251
- O-7251
- 7251
- Apollo 7251
- Nice Apollo 7251
- Nice 7251
- Nice Apollo 7251 post mount
- Nice Apollo 7251 post-mount slide gate operator
- 7251 post mount slide gate opener
- 7251 / 7351 slide gate operator family
- 72001K - related older or distributor kit reference for Apollo 7251 post-mount slide operator
- 1050US board
- 1050 control board
- OXI/A receiver - commonly associated with 7251 / 7351 packages
- OXI receiver - related receiver reference where used
- O-7351 - related pad-mount version and not the same mounting style
- 7351 - related pad-mount version
- Juno 310 - related Nice slide gate operator using Mercury 310, not the same operator family
Related Parts and Service Checks
- Confirm the 1050US control board is the required controller platform for the site.
- Confirm whether OXI / OXI/A receiver is included or must be ordered separately.
- Confirm transmitter compatibility if matching Nice Inti, Era One, or existing remote controls.
- Confirm whether #40 roller chain, chain brackets, and chain hardware are included.
- Confirm the required 12V battery package and battery capacity.
- Confirm whether AC charger, transformer, or solar panel must be ordered separately.
- Confirm the slide gate has good rollers, track, guide rollers, stops, catcher, and chain alignment.
- Confirm required monitored photo eyes, safety edges, loop detectors, exit devices, keypads, intercoms, and access-control devices for the site.
- Confirm manual release access, emergency access, fire access, warning signs, and local code requirements.
Technician Note
The first thing to verify is the mounting style. The O-7251 is the post-mount model. If the existing operator is a pad-mounted cabinet, compare against the O-7351 before ordering. The post-mount and pad-mount versions are related, but they are not the same cabinet layout.
Next, check the gate before sizing or replacing the operator. The slide gate should roll smoothly by hand from fully closed to fully open. Check the V-track, rollers, guide rollers, catcher, gate stops, chain brackets, chain alignment, and any slope. If the gate is hard to move by hand, the operator will be overloaded and may fault, slow down, strip parts, or damage the chain drive.
Battery and charging equipment are not just accessories on this operator family. The 7251 / 7351 platform is battery powered, with charging supplied by an AC charger or solar system when properly selected. Confirm whether the battery, charger, transformer, or solar panel is included in the actual package before publishing or selling the operator.
Before Ordering Checklist
- Confirm the required part number is O-7251 or NICE-O-7251.
- Confirm the gate is a vehicular slide gate, not a swing gate or barrier arm.
- Confirm the installation requires the post-mount 7251 model, not the pad-mount O-7351 model.
- Confirm the gate is no more than 25 ft long and no more than 800 lb.
- Confirm the gate rolls freely by hand with good rollers, track, guide rollers, stops, and chain alignment.
- Confirm the system requires the 1050US controller platform.
- Confirm package contents, including receiver, chain, battery, charger, solar panel, transmitters, and safety devices.
- Confirm the battery and charging system are correctly sized for AC or solar use.
- Confirm monitored entrapment protection devices are selected for open and close direction hazard areas.
- Confirm a qualified gate technician will set chain tension, limits, receiver operation, safety inputs, and accessory wiring.
Installation and Service Notes
This slide gate operator should be installed and serviced by a qualified gate technician familiar with Nice Apollo 7251 / 7351 operators and the 1050US controller platform. The installation may involve low-voltage DC power, battery charging, solar sizing, chain setup, limit adjustment, receiver programming, monitored safety devices, loop detectors, and access-control wiring.
Do not use this operator to bypass photo eyes, safety edges, stop circuits, monitored entrapment protection, warning devices, or other required safety equipment. Automatic slide gates must be installed with proper monitored protection for the open and close directions based on the actual gate layout.
For South Florida customers, Gate Openers Unlimited may be able to assist with availability and Hialeah Gardens local pickup when appropriate. Bring the gate length, gate weight estimate, operator mounting photos, track photos, chain-path photos, and current power plan when matching this operator locally.
Professional Advisory
After installation, test the gate through multiple open and close cycles. Confirm chain alignment, limit switch operation, open and close stopping points, battery charging, controller programming, receiver operation, manual release, obstruction response, monitored safety-device response, loop detector function, warning signs, and all access-control inputs before returning the gate to automatic operation.
Product Questions & Answers
What is the Nice Apollo O-7251?
The Nice Apollo O-7251 is the post-mount version of the Apollo 7251 / 7351 slide gate operator family. It uses the 1050US controller platform for compatible slide gate applications.
What size gate can the O-7251 operate?
The O-7251 is commonly rated for slide gates up to 25 ft long and up to 800 lb when the gate is properly installed, level, aligned, and rolling freely.
What is the difference between O-7251 and O-7351?
O-7251 is the post-mount version of the 7251 / 7351 slide operator family. O-7351 is the pad-mount version. They are related models, but the mounting layout and cabinet configuration are different.
Does the O-7251 use the 1050US controller?
Yes. The O-7251 / 7251 slide gate operator is commonly listed with the 1050US control board platform. Always verify the controller label on the operator or product package before ordering replacement control parts.
Does the O-7251 require a battery?
Yes. The 7251 / 7351 family is a 12VDC battery-powered operator platform. Confirm whether the battery, charger, transformer, or solar panel is included with the package or must be ordered separately.
Can the O-7251 be used with solar power?
Yes, the 7251 / 7351 family is commonly used in AC or solar charging layouts when the correct battery capacity, solar panel, charger, accessory load, and site sunlight conditions are reviewed.
Is the O-7251 compatible with swing gates?
No. The O-7251 is a slide gate operator. It should not be used as a swing gate operator, barrier gate operator, overhead door operator, or pedestrian gate operator.
What should be checked before ordering the O-7251?
Check the mounting style, gate length, gate weight, track, rollers, guide rollers, chain path, gate stops, battery and charging equipment, controller platform, receiver, accessories, and required monitored safety devices before ordering.
