Troubleshooting Proline Promag 53 MODBUS RS485
112 Endress+Hauser
9.6.2 Replacing the device fuse
#
Warning!
Risk of electric shock. Exposed components carry dangerous voltages. Make sure that the power
supply is switched off before you remove the cover of the electronics compartment.
The main fuse is on the power supply board → å 63.
The procedure for replacing the fuse is as follows:
1. Switch off power supply.
2. Remove power unit board → ä 108.
3. Remove cap (1) and replace the device fuse (2).
Use only the following types of fuses:
– 85 to 260 V AC: 0.8 A slow-blow / 250 V
20 to 55 V AC and 16 to 62 V DC: 2 A slow-blow / 250 V
– Ex-rated devices → See the Ex documentation
4. Installation is the reverse of the removal procedure.
"
Caution!
Use only original Endress+Hauser parts.
a0001148
Fig. 63: Replacing the device fuse on the power supply board
1 Protection cap
2 Device fuse
1
2
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