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SEB-722
Remote I/O Expansion Board
Revision 1.0 - (May 12, 2010)
Quick Start Guide
Saflec Systems (Pty) Ltd
Introduction
The SEB-722 Remote I/O Expansion Board is an addressable expansion device that attaches on to the
RS-485 Reader Network of the SDC Door Controller in conjunction with other RS-485 devices.
The SEB-722 Remote I/O Expansion Board can be used as a remote door controller thus avoiding
voltage loss for the I/O of a remotely situated door. It can also be used as a remote connection point for
additional I/O, for the same reason. The device contains 2x relay outputs (internal and external mode)
and 4x digital inputs (see Figure.1).
Four additional RS-485 devices and 2x Wiegand devices can be directly connected to the device through
the slave network or Wiegand Interfaces respectively, allowing more than 16 devices to be attached to
an SDC controller.
Figure 1
SEB-722 Remote I/O expansion board with feature labels
Copyright© 2010 – Saflec Systems (Pty) Ltd
www.safsys.co.za
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Summary of Contents for Saflec Systems SEB-722
- Page 1 Saflec Systems (Pty) Ltd Introduction The SEB-722 Remote I/O Expansion Board is an addressable expansion device that attaches on to the RS-485 Reader Network of the SDC Door Controller in conjunction with other RS-485 devices. The SEB-722 Remote I/O Expansion Board can be used as a remote door controller thus avoiding voltage loss for the I/O of a remotely situated door.
- Page 2 This step is optional, skip if no readers are required. The diagram shows an SSR-201 proximity reader being connected. Figure 4 Connecting the SSR-201 RS-485 Proximity Reader to the SEB-722 Remote I/O Expansion Board Copyright© 2010 – Saflec Systems (Pty) Ltd www.safsys.co.za...
- Page 3 Jumper set on +5Vdc Figure 5b Jumper set on +12Vdc Figure 6 Connecting a Wiegand Device to the SEB-722 Remote I/O Expansion Board Note: Indicated colors may vary depending on the type of cable used. Copyright© 2010 – Saflec Systems (Pty) Ltd...
- Page 4 This is the safer of the two methods because this connection is a potential free connection and any interference or damage to the output device will not effect the operation of the SEB-722 Remote I/O Expansion Board.
- Page 5 Important Note: This type of connection is limited by the power requirement of the output device and care must be taken that the power supply source of the SEB-722 Remote I/O Expansion Board is sufficient to supply power to the output device. Care must also be taken to ensure that the current rating of the powered device does not exceed the rating of the output.
- Page 6 SEB-722 Remote I/O Expansion Board Quick Start Guide 7. Connect the expansion board to the power supply. Note: The power supply should normally be a +15Vdc power supply capable of supplying 300mA, however if no rechargeable battery is connected, the power supply can be a +12Vdc power supply.
- Page 7 SEB-722 Remote I/O Expansion Board Quick Start Guide Notes: Copyright© 2010 – Saflec Systems (Pty) Ltd www.safsys.co.za...
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Page 8: Product Specifications
SEB-722 Remote I/O Expansion Board Quick Start Guide PRODUCT SPECIFICATIONS Power requirements Operating Voltage (DC) 12Vdc Maximum Current (with Externally Powered outputs) 200mA Maximum Current (Including four SSR-001 proximity 600mA card readers) Environmental characteristics Operating Temperature 0°C to +70°C Storage Temperature -10°C to +80°C...
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