Event board, Event output board, External event/alarm board information – Watlow Series 922 Retrofit User Manual
Page 41: Figure 25, External board control power, Figure 26, Ribbon cable connector to series 922, Figure 27
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