Synergis™ Cloud Link appliance has four on-board RS-485 communication channels for connecting I/O interface modules or card readers.
Consider the following when designing your system:
- The number of modules you can connect to each RS-485 channel depends on the type of interface modules you are installing.
- You can continue the RS-485 data daisy chain to interface modules outside enclosure.
- RS-485 readers must be powered directly from a separate power source.
RS-485 connector pinout:
|+||RS-485 D+ (A)|
|-||RS-485 D- (B)|
|S||Cable shield (GND)|
RS-485 termination DIP switches
When you start an RS-485 bus from the Synergis™ Cloud Link appliance for module or OSDP reader communication, you must set the associated termination DIP switch on the appliance to ON.
In the following example, card readers are connected to two RS-485 communication channels. The corresponding termination DIP switches are set to ON