Hach sc1000 - Manual (Page 149)

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A.7 Dismantle the DIN rail
1. Delete the module(s) in the sc1000 controller.
2. Remove power and disconnect all cable connections to the module(s).
3. Separate the module(s) on the DIN rail by sliding it to one side.
4. Use a suitable tool (i.e., screw driver) to pull down on the rear of the module.
5. Tip the bottom of the module away from the DIN rail and lift to remove.
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Figure 80 Dismantling the DIN rail