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Event board, Event output board, External event/alarm board information – Watlow Series 922 User Manual

Page 33: Figure 25, External board control power, Figure 26, Ribbon cable connector to series 922, Figure 27

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How to Install and Wire, Chapter 4

33

WATLOW Series 922 User's Manual

Event Board

Figure 26 -
External Board
Control Power
Wiring.

Figure 25 -
External Event/
Alarm Board
Information.

Figure 26

Figure 28a & 28b

Figure 27

Use the following figures to learn the connections and wiring of the External
Event/Alarm Board. Refer to Page 27 for dimension and mounting information.

External Event Board to Series 922 Connection

Figure 27 -
Ribbon Cable
Connector to
Series 922.

An auxiliary power supply is available on the Series 922 event board to supply DC
voltage needed to operate the Vaisala Model HMM 30C RH sensor or other transmitters
or transducers. The supply voltage varies from 21 to 33VDC, with the maximum current
output of 25mA.

L2

L1 GND

Control Power

Earth Ground

L2B

L1B

L1A

L2A

N.C.

L2

L1 GND

Control Power

Earth Ground

L2B

L1B

L1A

L2A

N.C.

115 VAC

230 VAC

Ribbon Cable Connection

to Series 922