English
The number of peripheral modules on the CIB (a branch).
The maximum number of CFox peripheral modules in one CIB is 32.
This number must NEVER be exceeded. In the case of modules supplied from the CIB (e.g. the C-HM-1113M) with a higher maximum power consumption, the total number of modules connected to the bus must be decreased, to avoid exceeding the total maximum current provided by the given CIB master configuration and the power supply (see the parameters of the configuration used - master module, or a CIB separation module).
Therefore it is always advisable to calculate the total power consumption of all modules in accordance with the documentation, and to verify if the bus is not overloaded.
In order to calculate the total power consumption of all modules on one CIB bus (branch), there is an auxiliary table in Chapter 13 with the CFox peripheral modules power consumption. The table shows both the minimum power consumption (with all relays switched off, minimum power take-off from other inputs and outputs) and the maximum consumption (with all relays activated, all inputs and outputs loaded to 100%). Based on the real synchronous operation of the relay outputs, a proportional reduction of maximum power consumption can be estimated and thus extra power can be obtained for other modules, etc.
Decreasing the CIB load (take-off from power supply).
Most peripheral modules are powered from CIB. However, there are modules, e.g. the C-HM-1121M, which are powered from 230VAC, or the C-OR-0008M, C-OR-0011M-800, C-JC-0006M and C-IB-1800M, which can be optionally powered from a 24 or 27 VDC external power supply, in which case they do not load the CIB and allow installation of several modules with inputs and outputs, without overloading the CIB.
Dividing larger applications among multiple CIB buses (branches).
In larger applications (with several CIB buses), power consumption of individual peripheries should be taken into account when designing the cabling topology. You should avoid e.g. fitting one bus only with modules with relay outputs, and another bus only with wall control units and temperature sensors (the first bus branch will be significantly more loaded, while in the other one the capacity will not be utilized). It is always advisable to split and mix the elements to achieve a reasonable balance of line cabling topology, number of modules and the load distribution on each CIB branch. It is not recommended to exploit the full capacity of each bus branch - it is appropriate to leave a reserve for later extension or modification of the application configuration.
Fusing and protection of the CIB bus power supply
The CF-1141 external master as well as the CIB internal master, and in fact the whole Foxtrot basic module, which contains an internal master (e.g. the CP-1000) and an external decoupling module,the C-BS-0001M, should be connected directly in the power supply output (PS2-60/27 or e.g the DR-60-24).
No element must be inserted between the supply source output and the CIB master or decoupler, which would affect the circuit inductance.
A thermal fuse can be used (but it is not necessary, as the source outputs and module outputs contain electronic resettable fuses), but you MUST NOT use e.g. a DC circuit breaker or other than recommended surge protection. Surge protection (only where needed!) can be implemented by the DTNVE(M) 1/CIB protection.