ICONIO Board

The first ICONIO board is part of a two card set that also includes the ICON Controller board (Figure 1). This first ICON is referred to as ICON-LOCAL (or just ICON). This first ICONIO card connects to the RS232 serial port COM2 on the controller board through CN7. The ICONIO card converts this RS232 level to 2-wire RS485 for transmission through connector CN6.

Pin	CN6 (Modbus RS485 interface)
1	RS485 B
2	RS485 A
3	Common

You may use a Cat 5 cable to connect a second ICONIO to the first by interconnecting their CN6 connectors (Figure 2). All additional ICONIOs are referred to as ICON-REMOTEs. You may daisy chain from the second ICON-REMOTE's CN6 connector to a third ICON-REMOTE. You may continue on and daisy chain to as many as 31 additional ICON-REMOTE boards. The maximum distance from the ICON-LOCAL to the last ICON-REMOTE is 4000 feet.

Switch configuration (SW1) for ICONIO-LOCAL (Note: the Modbus address is 255):

The ICONIO board "looks" like a Modbus device to your ICON program running on the ICON controller.  Each Modbus node must have a unique unit address in the range of 1 to 255. The first ICONIO-LOCAL is always given address 255. If you add additional ICONIO-REMOTE boards you may use the dip switches (SW1) to assign other addresses. Each separate ICONIO must have a unique address and it is easiest to assign them in order, 1, 2, 3 etc. For ICONIO-REMOTE, switches 9 and 10 function as described above. Switches 1 to 8 select the Modbus slave address as follows:

Make sure the Jumpers are set as follows on an ICON-LOCAL:

Jumper (JP) Number	State
JP1	Out
JP2	In
JP3	In
JP4	Out
JP5	In

Make sure the Jumpers are set as follows on an ICON-REMOTE:

Jumper (JP) Number	State
JP1	In
JP2	Out
JP3	Out
JP4	In
JP5	Out

Each ICONIO board receives its power through CN1 as decribed below:
 

CN1 Connection Number	Description
1	Earth ground, should be connected to an appropriate ground rod for maximum ESD and lightning protection.
2	Power Common (Center tap of AC power transformer if a center tap transformer is used).
3	9-24 VAC or VDC unregulated power input (Works great from 12V DC battery and solar panel).
4	9-24 VAC if using a center tap transformer.
5	Power Common.
6	Rectified AC input.

Notice power may be low voltage AC or DC in the range of 9 to 24 volts. If using an AC source you may use a center tapped transformer or a non-center tapped transformer. No voltage on connections 3 or 4 should exceed 35V peak with respect to power common. Earth ground and power common are connected together on the local ICONIO. However, it is not the same on ICONIO remote units. For remote ICONIO units you must still connect 1 to a ground rod. The power supply for power inputs 2-4 must be floating with respect to 1.

Connections 5 and 6 provide you with a way to supply unregulated DC power to external devices such as relay coils. This output is protected with a 3 amp resettable fuse. (Note, on older ICONIO boards, connections 5 and 6 do not exist.)