Watlow SDMA Card Shorted Solid State Relay Detector Manuel d'utilisateur télécharger pdf (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

- 24V +

1 2 1 2Normally 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

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.

1 2

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Watlow SDMA Card Shorted Solid State Relay Detector Manuel d'utilisateur Page 2