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15 Cables and protocols
15.1 General specifications
Readhead cable
Type A Ø4.7 mm, 28 AWG, 7 core, single screen, black jacket
Type B OD: 6.3 mm, 23 AWG, 6 core (3 × twisted pairs),
Type D Armoured: OD 10 mm, 28 AWG, 7 core
Extension cable
Type B OD: 6.3 mm, 23 AWG, 6 core (3 × twisted pairs),
(if applicable)
Type C OD: 7.8 mm, 20 AWG (power), 8 core (3 × twisted pairs
CAUTION: The FORTiS-S FS 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.
15.2 Permissible cable lengths
The tables opposite show permissible cable and extension cable combinations for the FORTiS-S FS range
of enclosed linear encoders. For longer extension cable lengths a shorter readhead cable is required. This
information is valid for all communication protocols and connector types. At the worse case the minimum
acceptable supply voltage is 4.75 Vdc.
Original instructions
Flex life > 20 × 10
cycles at 20 mm bend radius
6
Minimum static bend radius (internal radius): 15 mm
single screen, green jacket
Flex life > 20 × 10
cycles at 75 mm bend radius
6
Minimum static bend radius (internal radius): 31.5 mm
Flex life > 20 × 10
6
cycles at 100 mm bend radius
Minimum static bend radius (internal radius): 35 mm
single screen, green jacket
Flex life > 20 × 10
6
cycles at 75 mm bend radius
+ 2 power sense), single screen, green jacket
Flex life > 20 × 10
6
cycles at 75 mm bend radius
Minimum static bend radius (internal radius): 58 mm
Type B extension cables
1
0.5
1
Type A
3
6
9
0.5
Readhead
1
cable
length
Type B
3
(m)
6
9
1
3
Type D
(armoured)
6
9
Type C extension cables
0.5
1
Type A
3
6
Readhead
9
cable length
0.5
(m)
1
Type B
3
6
9
Extension cable length (m)
3
6
9
12
15
Max. extension cable length (m)
55
51
38
20
1
56
55
51
45
39
20
25
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