Honeywell SK-F485C SBUS Fiber Converter Instruction Manual
- May 15, 2024
- Honeywell
Table of Contents
SK-F485C SBUS/Fiber Converter
Product Installation Document
PN LS10004-001SK-E:C 12/13/2021 ECN: 151062
Description
The SK-F485C is a module used in pairs to convert the fire alarm control
panel’s (FACP) SBUS from wire to fiber and back again.
NOTE: Do not use this product to network FACPs.
The primary power, SBUS, and SLC circuits are supervised and power-limited.
Fiber-optic circuits are supervised.
1.1 Compatibility
The SK-F485C is used with compatible Honeywell Silent Knight and Farenhyt
Series FACPs and power supplies. For additional information, refer to the FACP
Installation Manuals.
Specifications
- External Power Supply: 9-35VDC @ 125 mA max
- Fiber Connection Duplex ST connectors for Tx and Rx Data Fiber Cable Duplex 62.5 micron Multi-mode Fiber Data Rate 115.2K bits/second
- Fiber Distance: up to 1.0 Mile (1.6Km) SK-F485C Connection (two-wire) or Terminal strip, and jumper selectable bias / termination
- There are several jumpers on the board. These jumpers need to remain in place.
- Maximum attenuation: 5.5db
- SK-F485C cable, single twisted pair, 24AWG, Helix 21011
- SK-F485C data direction control automatic half duplex transmitter enable control, for any baud rate / data bits
- Operating Temperature: 32° – 120°F (0-49°C)
- Humidity: 10%-93% (non-condensing)
- Dimensions: 4.75” x 4.25” x 1.0” (12.1cm x 10.8cm x 2.5cm)
Mounting
3.1 FACP Cabinet
Mount the SK-F485C in a compatible FACP/power supply cabinet.
- Remove AC power and disconnect backup batteries from the main control panel.
- Attach the supplied 1/4” standoffs to the studs in the back of the cabinet.
- Align the SK-F485C over the standoffs and secure with screws provided.
NOTE: When the SK-F485C is used with the IFP-100, 5808, IFP-75, 6700, IFP-50, or 5700, you must use the 5815RMK Remote Mounting Kit.
3.2 5815RMK Cabinet
The 5815RMK is a remote mounting kit that offers you the option to install up
to two SK-F485C converter modules in a single cabinet. When using the 5815RMK,
it must be mounted in the same room within 20’ (6.1 m) of the control panel or
the power supply and in conduit.
- Insert four supplied plastic standoffs into the holes in the plate in the back of the 5815RMK cabinet.
- Align the SK-F485C over the standoffs and press down gently until the board is secured to standoffs.
Wiring
4.1 FACP Wiring
See Table 1 and Figure 4 to properly wire the SK-F485C to a compatible FACP.
| SK-F485C Terminals | FACP SBUS Out Terminals |
|---|---|
| + | + |
| – | – |
| A | A |
| B | B |
Table 1 SK-F485C to FACP Terminal Connections
4.2 SK-F485C to Power Supply Wiring Connections
See Table 2 and Figure 4 for terminal connections from the SK-F485C to a
5895XL or RPS-1000 Power Supply.
| SK-F485C Terminals | Power Supply Terminal Number |
|---|---|
| + | 32, 22* |
| – | 33, 21* |
| A | 31 |
| B | 30 |
Table 2 SK-F485C to Power Supply Terminal Connections
- T-tap connection. Refer to Figure 4.
4.3 SK-F485C to SK-F485C Fiber Wiring Connections
See Table 3 for terminal connections from the first SK-F485C to the second SK-
F485C.
| SK-F485C Terminals | SK-F485C Terminals |
|---|---|
| RX | TX |
| TX | RX |
Table 3 SK-F485C to SK-F485C Terminal Connections
Figure 5 shows the fiber wire connection from the panel to the power supply.
SK-F485C Installation Instructions — P/N LS10004-001SK-E:C 12/13/2021
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