Eaton Rapid Link RAMO5, Manual

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11 Communications
11.1 ASi data bus
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11.1.2 Data cable
AS-Interface uses a geometrically coded, unscreened flat cable with a cross-
section of 2 x 1.5 mm
2
. It is used to transmit both power as well as all data
traffic between control and the peripherals and – to some extent – supplies
the connected devices with energy. The installation meets the usual require-
ments. Engineering is simplified by full flexibility in system layout and mount-
ing.
When a link is connected to the flat cable, two metal pins pierce through the
cable’s jacket and into the two cores to establish a contact with the AS-Inter-
face cable. There is no need to cut and strip cables, apply ferrules or connect
individual cores.
Rapid Link function modules can be installed and removed any number of
times at various locations. The AS-Interface flat ribbon cable is self-repairing,
dust-proof and water-proof. The network can have a star, linear or tree struc-
ture.
11.1.3 Data Transfer
Data is modulated onto the supply voltage so that it can be transmitted.
During this process, each card’s transmitter injects data signals into the
cable. This causes a change in the voltage induced in the data coupling coils.
This change is detected by the receiver of each card along the AS-i cable.
11.1.3.1 AS-i slaves with expanded address range
When using AS-i slaves (A/B slaves) with an expanded address range with
AS-i profile S-7.A.E, an address can be assigned to a maximum of 62 mod-
ules. Addresses 1A and 1B can be assigned for this (maximum: 31A and
31B).
The response time when a command is sent via an AS-Interface is 160 μ s per
card; for 31 cards this is 5 ms.
a Piercing pins
b Flat cable, protected against polarity reversal
Figure 108: ASi ribbon cable
① ①
②
– +
10
6.5
4
2
￫
When using RASP5 units, a maximum of 31 modules can be
connected to (assigned an address on) a single AS-i line.