Schlage Electronics 900-4RL 4 Relay Board with Integrated Logic

The 900-4RL is an option board for the Schlage PS900 and Von Duprin PS914 power supplies. It mounts inside those supplies as a distribution board, so it isn't a standalone relay module you wire up on its own. If your power supply is something else, this board is the wrong part.

The 900-4RL handles security interlocks (mantraps, where one door has to be secure before the other releases), auto operator sequencing, and time delays. The integrated logic is the point: the sequencing lives on the board instead of you building it out of discrete relays and timers in the enclosure.

Compliance on the 900-4RL is UL 294, ULC-S318, RoHS and FCC Part 15. UL 294 is the access control system units standard, which is the listing a spec writer on an institutional job is usually asking for, and ULC-S318 covers the Canadian side.

Both are multi-relay boards used to distribute and switch access control outputs. The Schlage Electronics 900-4RL is a four relay board with integrated logic intended for use with the Schlage PS900 and Von Duprin PS914 power supplies, and it carries UL 294, ULC-S318, RoHS and FCC Part 15 compliance. The Securitron RB-4 is a standalone relay board in the RB-4 series, so it is the one to look at when the relays are not going into a PS900 or PS914 supply enclosure. If the job is a Schlage or Von Duprin power supply build, the 900-4RL is the board that drops into that platform.

The 900-4RL is a four relay board with integrated logic built for security interlocks, auto operators and time delays inside a Schlage PS900 or Von Duprin PS914 power supply. If the only requirement is a time delay on a single output, the Securitron TM-2 Time Master II is a multi-function timer that handles that function on its own without the four relay distribution board or the host power supply.

No - they solve different problems. The Aiphone RY-PA is a 12V DC normally open door release relay for the Aiphone LEF series intercoms, so it is a single release contact tied to an intercom system. The Schlage Electronics 900-4RL is a four relay board with integrated logic for security interlocks, auto operators and time delays, used with the Schlage PS900 and Von Duprin PS914 power supplies. Use the RY-PA where an LEF intercom needs to fire a strike, and the 900-4RL where multiple outputs and interlock or delay logic run off an access control power supply.

Rated operating range on the 900-4RL is 32 to 120 degrees F (0 to 49 C). That rules out an unheated space that drops below freezing, and it rules out a hot mechanical room or rooftop enclosure that climbs past 120 F. Conditioned interior space is what it's built for.

For a single contact at an Aiphone LEF series intercom, the Aiphone RY-PA is a 12V DC normally open door release relay built for that purpose. Stepping up from there, the Securitron RB-4 relay board provides a multi-relay board where several contacts are needed. The Schlage Electronics 900-4RL is the four relay board with integrated logic that adds interlock, auto operator and time delay control, and it is used with the Schlage PS900 and Von Duprin PS914 power supplies.

For interlock sequencing the Schlage Electronics 900-4RL is built for the job directly - it is a four relay board with integrated logic for controlling security interlocks, auto operators and time delays, and it carries UL 294, ULC-S318, RoHS and FCC Part 15 compliance, with an operating temperature range of 32 to 120 degrees F (0 to 49 degrees C). It is designed to be used with the Schlage PS900 and Von Duprin PS914 power supplies. The Securitron RLP relay logic pack is the alternative to evaluate where the interlock logic is not being built into one of those supplies.

Four, which is where the model designation comes from. Four outputs is enough to run a two-door interlock with an auto operator tied in, or to distribute switched power to several openings off one PS900 or PS914 supply.