SDV-DM7 AC200/220 Omron, SDV-DM7 AC200/220 Datasheet - Page 70

• Manufacturer Part Number: SDV-DM7 AC200/220
• Description: Sensor Hardware & Accessories VOLTAGE SENSOR
• Manufacturer: Omron

Specifications of SDV-DM7 AC200/220

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Connections
To Detect Reverse Phase or Open
Phase
Operation
• Suppose the motor revolves in the forward direction when the input
• To protect the motor from damage due to open phase, the wiring
Note: Open-phase detection is only possible when a 200/220-VAC
68
terminals F, D, and C of the APR-S are connected, in this
sequence, to the power lines. The APR-S Relay turns ON when the
phase sequence of the voltage is in the forward direction, that is,
when the power lines R, S, and T are energized in this sequence.
When the Relay turns ON, terminals E and A conduct, energizing
the contactor. If one of the three phases is reversed, the Relay
does not turn ON and the contactor is not energized.
must be performed in exactly the same way as shown in this figure
(i.e., so that the phase connecting the contactor coil is not the same
as the phase connecting terminal D of the Relay).
If phase R or T is open, the contactor does not operate because
one side of its coil is not energized. If phase S (connected to termi-
nal D of the Relay) opens, the Relay does not turn ON, allowing no
current flow between terminals E and A. The contactor therefore
does not operate.
Note, however, that the contactor is prevented from operating by
preventing an open-phase voltage from flowing into the motor and
not by the open-phase protection feature of the Relay.
APR-S is used with the wiring exactly the same as shown in the
above diagram.
Reverse Protection Relay
Power supply
200/220 VAC
R S
M
T
Contactor
3
2
APR-S Reverse
Protection Relay
1
4
8
5
7
6
APR-S
To Switch to Reverse Phase
Operation
• Suppose the motor revolves in the forward direction when the input
Note: Open-phase detection is not possible.
terminals J, A, and C of the APR-S are connected, in this
sequence, to the power lines R, S, and T, respectively. The APR-S
Relay turns ON when the phase sequence of the current is in the
forward direction, that is, when the power lines R, S, and T are
energized in this sequence. When the Relay turns ON, terminals F
and G conduct, energizing the contactor. If one of the three phases
is reversed, the Relay does not turn ON, and terminals F and G
do not conduct, but a current flows between terminals F and H,
energizing the reverse-phase contactor.
Power supply
380/400 VAC
R S
M
T
Contactor
Note: Use separate power supplies
for the contact’s applied volt-
age and control voltage.
APR-S380
220 VAC