The I/O wiring recommendations provide guidance on what type of wires should be used for the different Central IO modules, AS-B server onboard I/O, RP and MP controller onboard I/O, and IP-IO and RP-IO I/O modules, how to perform grounding, and how to connect different external devices to the inputs and outputs. This section also provides information on the external connectors required for the RP controller expansion modules and the RP-C-16C-F-230V model. Always use the recommended cables and wires.
Some relay output terminals, Central IO modules, or terminal bases may carry lethal voltages. Always disconnect the power supply and other high voltage equipment connected to the device before wiring.
For the Central IO modules, most of the wiring is made to the terminal base, and can be done before the electronics module is installed.
For the AS-B server onboard I/O, MP-V controller onboard I/O, and IP-IO modules, the wiring is made to the removable terminal blocks, and can be done before the devices are installed on the DIN rail.
For the RP controller onboard I/O and RP-IO modules, the wiring is made to fixed terminal blocks.
For the MP-C controller onboard I/O, the wiring is made to removable or fixed terminal blocks, depending on the MP-C model. For more information, see MP-C Models .
The RP controller expansion modules have PCB mounted connectors for the power input, outputs and digital inputs. The connectors are mechanically keyed and color-coded, which allows the matching external connectors to be plugged in on site quickly and easily.
The RP-C-16C-F-230V controller model differs from the other RP-C models in that, instead of screw terminals, it has the same type of connectors as the RP controller expansion modules.
For digital inputs and outputs, you can use shielded or unshielded wire. Unshielded wires are usually sufficient.
For analog inputs and outputs, you can use shielded or unshielded wire. Shielded wires are recommended if the wiring is placed in a noisy electrical environment. Connect the shield to ground only at a RET terminal.
If the wiring is placed in a noisy electrical environment, shielded wires are recommended for RTD-DI-16 Central IO modules, AS-B server onboard I/Os, RP and MP controller onboard I/Os, and IP-IO and RP-IO modules that have the following external connections:
RTD temperature input
RTD resistive input
It is important to perform the grounding correctly for the following reasons:
To design a system that is not harmed by detected minor connection errors.
To design a system that works well and is resistant to EMI.
To minimize the effects of ground currents that can cause unstable measurements.
For more information, see Grounding and Power .
There are many different kinds of external devices from different vendors that can be connected to an EcoStruxure BMS.
For more information, see External Device Connections .
This section provides recommendations on minimum wire sizes (cross-sectional areas) and maximum wire lengths for the wires connected to the screw terminals of Central IO modules, AS-B servers, RP and MP controllers, and IP-IO and RP-IO I/O modules. Recommendations on minimum wire size and maximum cable length for the digital inputs of the RP controller expansion modules, the DALI bus of the DALI light modules, the SMI Interface of the SMI blind modules, the Zigbee DALI and 0-10V modules, and the KNX Modbus gateway are also provided. The recommendations are for guidance only. Other wire sizes and lengths may be used, depending on wiring rules and when appropriate.
For more information, see Wire Sizes and Lengths .
This section provides information on the external connectors that are required for the power supply input, outputs, and digital inputs of the RP controller expansion modules.
For more information, see Required External Connectors for the RP Controller Expansion Modules .
This section provides information on the external connectors that are required for the power input, the input for an external 24 VAC/VDC power supply, the SSR outputs, and the universal inputs/outputs of the RP-C-16C-F-230V controller model.
For more information, see Required External Connectors for the RP-C-16C-F-230V Controller Model .