Edwards 3-RS485B is the network communications card for the EST3 life safety platform. It mounts to the back of the 3-CPU3 central processor unit and connects that panel to the EST3 network, providing one Class A, X or B network data circuit and one Class B circuit for digitized audio data.
Network messages received by the card are re-transmitted to the next node, which maximizes wire run lengths. EST3 networks connect up to 64 nodes on a peer-to-peer multi-priority token ring with no master, giving network response times under three seconds. The network media can be twisted copper RS-485, short-haul modems or fiber.
Specifications
| Network data circuit |
One, Class A, X or B |
| Audio data circuit |
One, Class B |
| Standby / alarm current |
98 mA / 98 mA |
| Mounting |
Back of the 3-CPU3 |
| Distance |
Up to 5,000 ft. (1,524 m) between any three panels via RS-485 |
| Operating environment |
32 °F to 120 °F (0 °C to 49 °C), 93% RH at 40 °C non-condensing |
| Shipping weight |
0.33 lb (0.15 kg) |
| Agency approvals |
UL, ULC, CSFM, CE, LPCB, EN 54 (with -E suffix) |
Installation notes
- Plugs into the network card connector on the 3-CPU3 and is secured to the CPU.
- Network and audio data wiring land on removable terminal blocks on the 3-CPU3.
- Order the -E suffix version for EN 54 compliant systems.
Related models
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3-RS485A: network card with Class A or X network and audio circuits
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3-RS232: RS-232 communication card for the 3-CPU3
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3-CPU3: EST3 central processor unit that carries the card
Documents
FAQ
Where does the 3-RS485B install?
It is a network communications option card that mounts to the back of the EST3 3-CPU3 central processor unit.
What circuits does it provide?
One Class A, X or B network data circuit and one Class B digitized audio data circuit. The 3-RS485A provides Class A or X circuits for both network and audio.
How far apart can panels be?
Up to 5,000 ft. (1,524 m) between any three panels over RS-485, with up to 64 nodes on the EST3 peer-to-peer token ring network.
How much current does it draw?
98 mA in standby and 98 mA in alarm.
