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SPA2-2 installation guide
www.renishaw.com
E-STOP / reset
The external E-STOP connector is provided to allow connection of external E-STOP switches and a reset switch (see 'SPA2-2 connections' for
further detail). For the circuit the maximum voltage is 24 V dc and the maximum current is 1 A. The cable size will depend on its length (see
table below for our recommendations).
The current taken by the E-STOP can be up to 1 A.
Maximum current
Maximum
(Amps)
permitted Volt
drop
1
2
1
2
1
2
Axis motors
The axis motor connectors provide the power to the axis motors and, if appropriate, the motor tacho connections. For the SPA2-2 the
maximum voltage is 60 Vdc and the peak current is 10 A. The actual peak current will be dependant on the size of motor fitted and how hard
it needs to be driven, so cable sizes for 2 A, 5 A and 10 A are given in the table below.
The 3 motor connections can provide 5 A continuous and 10 A peak.
Maximum motor
Maximum
current (Amps)
permitted Volt
drop *
2
2
2
2
2
2
5
2
5
2
5
2
10
2
10
2
10
2
* This is just a suggested value. The machine design will determine the actual value.
Issued 11 2020
Maximum length
Minimum CSA
(metre)
﴾mm²﴿
10
0.09
20
0.17
40
0.34
Max length (metre) Minimum CSA
﴾mm²﴿
10
0.17
20
0.34
40
0.69
10
0.43
20
0.86
40
1.72
10
0.86
20
1.72
40
3.44
Minimum diameter
Nearest AWG size
(mm)
0.33
27
0.47
24
0.66
21
Minimum diameter
Nearest AWG size
(mm)
0.47
24
0.66
21
0.94
18
0.74
20
1.05
17
1.48
14
1.05
17
1.48
14
2.09
11
34
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