MOUNTING AND WIRING 4-25
SB1391 Hardware and Setup Guide - Document revision no. 1.14
The digital I/O supply can be either an external supply (factory default configuration) or the
internal 5Vdc (non-isolated). The source of the I/O supply is jumper-configured (see table below).
Warning
If the SB1391 is intended to be used with a secondary supply circuit or DC supply, the
supply must be a suitably European Approved power supply.
If an external supply is used, the voltage level can be either 5Vdc (±10%) or 24Vdc (±20%), with
the voltage level detected automatically.
Warning
To change the jumper position it is necessary to open the control module. This
voids the product warranty. Therefore it is recommended to order the
required jumper configuration from the factory.
FIGURE 4-22 Jumpers for selecting I/O supply source and for selecting input type
TABLE 4-20 Digital input/output supply selection
Input supply source Output supply source JP5 on
pins
JP6 on
pins
JP21
on pins
JP22
on pins
External 5Vdc/24Vdc
(Factory default)
External 5Vdc/24Vdc
(Factory default)
2 -3 2 -3 2 -3 2 -3
External 5Vdc/24Vdc
Internal 5Vdc (non-
isolated)
1 - 2 2 -3 1 - 2 2 -3
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