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Equipment reference / Rytec System 4 or System 4+: identify the controller generation

Rytec System 4 or System 4+: identify the controller generation

Compare CAN architecture, front controls, legacy module numbers and battery roles before selecting a source manual or component.

US source scopeReference updated 2026-09-14

Identification details & limits

Reference identifier: Rytec System 4 or System 4+: identify the controller generation. Compare each listed detail with the exact product and the source document. Do not submit a personal serial number or access code to this website.

Identification and scope details from the cited sources; each row retains its source locator.
System 4 front controlsThe September 2015 manual shows a scrolling display and three door-control buttons.
System 4+ front controlsThe July 2026 design adds a separate four-button row for night mode, Bluetooth, lock and an optional function. Confirm the model label; appearance alone does not establish part interchangeability.
CAN architecture differsSystem 4+ integrates the CAN interface on its microcontroller board; the previous System 4 used a separate COMM board. This design change does not establish a replacement-number mapping.
Connections and power supplySystem 4+ adds USB-A and USB-C connections and a revised power supply split into three circuits. These are generation-identification facts, not installation instructions or proof that earlier boards fit.
00122000Loop module. Optional plug-in module; confirm installed controller and door scope.
Exact component number00122000
Exact-number source trace00122000
0012161Radio receiver. Optional radio-control module. No transmitter compatibility inferred.
Exact component number0012161
Exact-number source trace0012161
00111193D-size battery with tabs. Parts appendix listing only; not equated with the separately specified CR2032 board socket.
Exact component number00111193
Exact-number source trace00111193
System 3 loop module exclusionThe 2015 System 4 manual identifies 00122000 and explicitly says the larger System 3 loop module does not fit System 4. It supplies no exact System 3 part number; no reverse-fit or successor claim follows.
System 4+ loop configuration remains unnumberedTwo- and four-loop detector options are shown without a numeric identifier. Shared function or appearance does not establish that legacy 00122000 fits.
Receiver numbers remain distinctThe July 2026 System 4+ parts figure identifies 00121045 as a 24 V DC AM two-channel receiver. The older appendix prints 0012161. Neither source establishes an alias, successor or transmitter pairing between them.
Exact component number00121045
Exact-number source trace00121045
Optional module designationsThe legacy specifications name TST SFSS, TST SUVEK, TST SUKS, TST RFUxK, TST RFUxCOM and TST RLCCDR-A by function. They are not verified aliases for the numeric Rytec parts. The TST RFU3P freezer board is explicitly not provided in this source configuration.
Battery roles remain separateThe legacy specification gives a CR2032 3 V board socket, while its parts appendix lists D-size 00111193 with tabs. These do not describe the same battery. Do not substitute one form for the other.
System 4+ button cellThe July 2026 parts figure identifies 00142015 as a CR2032 3 V lithium button cell. This fact does not turn the legacy D-cell listing into an alias.
Exact component number00142015
Exact-number source trace00142015
Legacy electrical-specification uncertaintyThe 2015 manual gives different lower supply limits in its specification table and overview/parts list. Follow the individual installed nameplate and schematic with the manufacturer; no corrected universal range is published here.
Older Spiral retrofit boundarySome older CAN-bus Spiral retrofits may need a CAN-enabled encoder update. The manual gives no exact encoder successor or basis for applying that condition to every door.
Selection boundaryMatch the actual controller generation, door serial and individual schematic. These manuals describe controller systems; their shared Rytec branding does not establish compatibility with every Rytec door or every accessory.

Sources & review dates

  1. Rytec PredaDoor NXT and PredaCool owner manual: parts sectionRytec · US · checked 2026-09-13 · 1060730-0, Rev01 (07/25)
  2. System 4 Drive & Control installation and owner manualRytec · US · checked 2026-09-13 · R00152000 September11 2015
  3. Rytec System 4+ Controller Installation and Owner's ManualRytec · US · checked 2026-09-13 · 1211137-0 Rev01 July2026

This independent reference preserves the source’s stated scope. It does not report an Anderson installation inspection, product test or safety clearance.

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The cited sources define the product details shown here; comparison does not establish fitment. Anderson’s repair service covers its listed Connecticut communities; this national reference does not imply nationwide service.

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