ST750 GENERAL HANDBOOK
667/HB/33750/000 Page 92 Issue 6
5.13.2.1 Fuse/Dummy Fuse Settings
The output voltage for the Pedestrian Red and Pedestrian Green can be set to
either 230V or 48V operation. Fitting the fuse and dummy fuse as follows sets the
voltage:
• For 230V operation fit the 10A fuse in F10 and the dummy fuse in F11.
• For 48V operation fit the 10A fuse in F11 and the dummy fuse in F10.
The output voltage for the Pedestrian Waits can be set to either 230V or 48V
operation. Fitting the fuse and dummy fuse as follows sets the voltage:
• For 230V operation fit the 10A fuse in F8 and the dummy fuse in F6.
• For 48V operation fit the 10A fuse in F6 and the dummy fuse in F8.
Note that the ST750LED Phase Driver PCB with LV CLS (NLM) monitoring always
provides Waits at 48V, so F8 does not exist, and F6 is always fitted.
Note: The dummy fuse is a plastic spacer, the same size as the fuse it replaces. It
is used to prevent service personnel inserting an extra fuse and thus causing
damage to occur to the ST750.
5.13.2.2 Blue and Red Handbag Links Settings
The output voltage monitoring circuits for the Pedestrian Red and Pedestrian Green
can be set to monitor either 230V or 48V. Inserting the correct coloured handbag
links on the board sets the voltages for the Monitoring circuit. The positions and
colours are as follows:
• For 230V operation fit only a Red Link in position LK22 (large pitch).
• For 48V operation fit only Blue Links in positions LK22 (small pitch), LK15 and
LK17. On 4 phase units fit LK18 and LK20.
Note: Links LK15, LK17, LK18 and LK20 are accessed through the two rectangular
cut outs in the heatsink cover. See Figure 39 for details. A pair of long nose pliers is
required to insert and extract the handbag links.
The output voltage monitoring circuits for the Pedestrian Wait can be set to monitor
either 230V or 48V. Inserting the correct coloured handbag links on the board sets
the voltages for the Monitoring circuit. The positions and colours are as follows:
• For 230V operation fit only a Red Link in position LK21 (large pitch).
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