New lift FST-2XT Manuel De Montage page 140

Figure 5: Wiring diagram for hydraulically operated lift systems with redundant
lowering valves as braking elements
2 Conditions
2.1 The safety devices of the circuit board (tap for safety chain) are to be connected as speci-
fied in document BMP-Hinweise_FST-2XT.
2.2 The safety circuit bypass control is integrated on the printed circuit board as a fixed com-
ponent of the FST-2XT 5 00 controller. It is designed for a temperature range from 0 to
+65°C at a relative humidity of 15 to 85%.
2.3 The operating voltage is 24V DC, whereas the operating contacts and conductor paths
are designed for a 230V AC (optional 48V DC, 110V AC) safety circuit, fuse-protected
with max. 4A.
2.4 A closing contact from X20.1 to X14.1 is integrated in the controller for quick-start.
Direct connection from X14.1 to X15.7 is not allowed.
2.5 The wiring must be implemented according to "FST-2XT safety circuit scan control and
safety circuit bypass control schematic drawing" figure 2 (e.g., N-wire at X15.6, return wire
of the contactors and valves at X20.2; X14.1 not connected to X15.7).
2.6 If the braking element is supplied with power directly via the electric safety circuit, redun-
dant activation of the braking element is not necessary. If the braking element requires a
voltage other than that available directly from the electric safety circuit, redundant activa-
tion with standstill monitoring is necessary.
Manuel de montage et de mise en service FST-2XT FST-2XTs
Annex to the EU Type Examination Certificate
No. EU-ESD 023 of 2016-10-04
140