Siemens SIRIUS 3SK1

8.2.6 Wiring rules for spring-loaded terminal (push-in system)
Notes on handling spring-loaded terminals (push‑in system)
The terminal area of the spring-loaded (push-in) terminals is rectangular, and the maximum
overall dimensions of the conductor to be wired must not exceed 1.5 x 2.4 mm (control current
terminals).
Attention must be paid to the orientation of the terminal area, which may call for vertical 󹪝tting
of rectangularly crimped cables.
To make optimum use of available terminal area, you are advised to choose a form of crimping
that creates a corresponding rectangular contour. Trapezoidal crimping is generally very highly
suitable in this case.
When use is made of a cable that utilizes the full overall height, the terminal's spring is
de󹪞ected to the maximum. Therefore, removal of this cable may become a problem because it
requires further de󹪞ection of the spring.
Control current terminals
2.4 mm
1.5 mm
Terminal area of control current terminals
8.2.7 Connection data for 3SK1 spring-loaded terminal (push-in system)
Connection data for ... Control current terminals
Connectable conductor cross-sections for solid cables 2 x 0.5 ... 2 x 1.5 mm²
(AWG
1)
: 20 ... 16)
Connectable conductor cross-sections for
󹪞exible cables
Without end sleeve 2 x 0.5 ... 2 x 1.5 mm²
(AWG
1)
: 20 ... 16)
With end sleeve (with and without
plastic sleeve)
2 x 0.5 ... 2 x 1.0 mm²
2)
(AWG
1)
: 20 ... 18)
With TWIN end sleeve ---
---
Cable stripping length 10 ... 11 mm
End sleeves according to DIN 46228‑4 with plastic sleeve 10 mm
1)
AWG: American Wire Gauge (AWG does not de󹪝ne use of end sleeves)
2)
When 2 x 1.0 mm² end sleeves with a plastic sleeve are used, space problems may arise with the sleeves; as an alternative,
you are advised to use end sleeves without plastic sleeves
Connection
8.2 22.5 mm/17.5 mm devices
SIRIUS 3SK1 Safety Relays and 3RQ1 Positively-Driven Coupling Relays
160 Equipment Manual, 05/2021, A5E02526190021A/RS-AE/005