Voltage Drop When An Extension Base Unit Is Used - Mitsubishi Electric Q26UD(E)HCPU User Manual

4.3.4

Voltage drop when an extension base unit is used

Since the extension base unit (Q5B or QA1S5B) is supplied with 5VDC from the power supply module on the main
base unit, a voltage drop occurs at extension cables. Improper I/O may occur if the specified voltage (4.75VDC or
higher) is not supplied to the "IN" connector of the Q5B or QA1S5B.
When using the Q5B or QA1S5B, make sure that the "IN" connector of the Q5B or QA1S5B is supplied with
4.75VDC or higher.
And it is recommended to connect either of the extension base units as close as possible to the main base unit by
using the short extension cable, so as to minimize the effects of voltage drop.
(1) When only the Q5B or QA1S5B is connected to the extension base unit
(a) Selection condition
4.75VDC or higher must be supplied to the "IN" connector of the Q5B or QA1S5B in the final extension
base.
88