The Nice Apollo 1050US UL325 2018 Control Board cannot be used unless you are using the number of needed entrapment devices. This is in order to comply with the UL325 2018 Safety Standards. Monitoring of external entrapment protection sensors is required for all automated gate operators manufactured after January 11, 2018.

The latest revision, effective August 1, 2018 requires the following:

Slide Gate Operators Require TWO external entrapment protection sensors to operate, one in each direction of travel. Sensors can either be contact (edge sensor) or non-contact (photo-eye).
Swing Gates Operators Require TWO external entrapment protection sensors, either contact (edge sensor) or non-contact (photo eye), unless there is no entrapment risk in one direction.
The photo eyes or edge sensors you install must be approved for use with the specific gate operator installed. Sensors proven acceptable are described in each of the gate operator's installation manual.
UL 325 sets the MINIMUM standard of safety. You must also verify that the gate site complies with ASTM F2200. Survey site, usage class, gate type and other conditions. Design and install appropriate external entrapment protection sensors that address all potential entrapment zones.
Nice Apollo 1050US UL325 2018 Control Board Compatible Models:

Nice Apollo 1550 (1551)
Nice Apollo 1650
Nice Apollo 3500 (3501)
Nice Apollo 3600
Nice Apollo 7000*
Nice Apollo 7100*
Nice Apollo 7200 (7251) **
Nice Apollo 7300 (7351)*
Nice Apollo NT-T5
Nice Apollo NT-T7
Nice Apollo NT-M12ETL
Nice Apollo NT-H12ETL
Nice Apollo 4300SW
Nice Apollo 4500SW
Nice Apollo 8300SL
Nice Apollo 8500SL
Nice Apollo 1724
Nice Apollo 1824
Nice Apollo Titan12L1
**Please note that older version of the 7200 the 1050 board will work, but will not mount to the box. A new sprocket will also be needed 40BS13

Cutting-edge solutions:
• LCD display for easy programming,diagnosting and troubleshooting
• New-innovative obstacle detection system which distinguishes impact vs dragging force
• Plug-in receiver: up to 1,000 rolling-code transmitters, with more than 2X range than industry standard
• Smart management of the battery charge
• 7 day timer
• Master/slave management for two control units working together
• Protection against electric shocks
• Programmable connections to external accessories such as lights, keypads, etc.
• Compatible with all Apollo and Nice Operators
Please Note: Mounting the control board may vary depending on opener, brackets may be need to be ordered.