Watlow SDMA Card Shorted Solid State Relay Detector - Manual (Page 2)

Load Number of Passes of Load Wire
Current Through Current Transformer
2 to 3 Amps 5
3 to 4 Amps 4
4 to 5 Amps 3
5 to 10 Amps 2
10 to 40 Amps 1
S D M A
Heater
+
-
Alarm
Coil
D1
- 24V +
1 2 1 2 Normally Closed
Contact
SW1
Momentary
Reset Switch
RYI Contacts
External Latching Relay
24V (dc) Coil
V~ (ac)
24V (dc)
(Customer Supplied)
Minimum of 21mA
supply current
(per SDMA card)
is required.
RY1
CT
Alarm
1 2
Alarm
1 2
Figure 3 - SDMA Card Wiring
Table 1 - Application of 16-0231 Current Transformer
Figure 2 - Three Dimensional View of Wiring
NOTES:
Include a flyback diode across the external
latching relay coil. See D1.
To form a logic chain alarm, place multiple
SDMA alarm outputs in series.