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16 Cables and serial interfaces
Further information relating to cables for the FORTiS encoder range can be found in the data sheet
Cables for FORTiS absolute encoders (Renishaw part no. L-9517-0069). This can be downloaded
from our website
www.renishaw.com/fortisdownloads
Renishaw representative.
16.1 General specifications
Readhead
Type A
Ø4.7 mm, 28 AWG, 7 core, single screen, black jacket
cable
Flex life > 20 × 10
Minimum static bend radius (internal radius): 15 mm
Type B
OD: 6.3 mm, 23 AWG, 6 core (3 × twisted pairs),
single screen, green jacket
Flex life > 20 × 10
Minimum static bend radius (internal radius): 31.5 mm
Type D
Armoured: OD 10 mm, 28 AWG, 7 core
Flex life > 20 × 10
Minimum static bend radius (internal radius): 35 mm
Extension
Type B
OD: 6.3 mm, 23 AWG, 6 core (3 × twisted pairs),
cable
single screen, green jacket
(if applicable)
Flex life > 20 × 10
Minimum static bend radius (internal radius): 31.5 mm
Type C
OD: 7.8 mm, 2 × 20 AWG (power),
4 × 23 AWG (signal), 2 × 28 AWG (sense),
single screen, green jacket
Flex life > 20 × 10
Minimum static bend radius (internal radius): 58 mm
CAUTION: The FORTiS encoder system has been designed to the relevant EMC standards,
but must be correctly integrated to achieve EMC compliance. In particular, attention to shielding
arrangements is essential.
40
FORTiS-N Functional Safety enclosed encoder system – original instructions
and is also available from your local
cycles at 20 mm bend radius
6
cycles at 75 mm bend radius
6
cycles at 100 mm bend radius
6
6
cycles at 75 mm bend radius
cycles at 75 mm bend radius
6
16.2 Permissible cable lengths
The tables below show permissible cable and extension cable combinations for the FORTiS range
of enclosed linear encoders. For longer extension cable lengths, a shorter readhead cable is
required.
This information is valid for all serial interfaces and connector types. At the worse case the
minimum acceptable supply voltage is 4.5 Vdc.
NOTE: If the original termination supplied with the FORTiS-N FS encoder system is altered or
a non-Renishaw cable that is not approved is used, then it is the responsibility of the system
manufacturer to make sure the system is compliant with IEC 61800‑5‑2:2016 Electromagnetic
immunity requirement for safety related systems – Annex E, second environment.
NOTE: For Siemens systems, the distance between the readhead and the DRIVE-CLiQ interface
must adhere to the restrictions shown in the tables in this section, but the combination of readhead
cable and extension cable MUST NOT EXCEED 10 m.
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