PAS SERIES Remote Control 4-13
Connecting the Shield to the Vext Side
• If you are connecting the shield to the Vext side when
using external voltage control, do not connect the
shield to the - (neg.) output terminal of the unit.
When using shielded wires, some external voltage sources may
require that the shield be connected to the external voltage source
(Vext). In such case, the grounding method used for Vext and the unit
creates a condition in which the output is short-circuited, as shown in
Fig.4-5. Thus, do not connect the shield to the - (neg.) output terminal
of the unit.
Fig.4-5 A connection in which the output is short-cir-
cuited by the shield
• Leave the output of the external voltage source (Vext)
floating. The potential of the J1 connector is nearly
equal to the - (neg.) output terminal, and short-circuit
current flows to the signal line even without the
shield.
+
+
–
+
–
–
2-core shielded wire
Vext PAS
Output is short-circuited
by the shield, causing
current to flow.
Ground the
+ (pos.)
output terminal.
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