WattMaster MG331-21-VAVCAV - Manual (Page 9)

Form: WMS-OE357-4RelayOutput-ModExpBoard-1B.doc
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VAV System
Description
The OE357 - 4 Relay Output Modular
Expansion Board is used in conjunction
with the OE352 - 2 Slot Modular I/O
Base Board or the OE353 - 4 Slot
Modular I/O Base Board. The OE357
Expansion Board provides 4 relay out-
puts for pilot duty switching control.
For easy wiring the OE357 – 4 Relay
Output Modular Expansion Board con-
nects to the OE352 or OE353 Modular
I/O Base Boards by means of an inte-
gral connector arrangement. Power is
supplied to the OE357 - Expansion
Board through this connector, simplify-
ing installation and connection. Jumpers
are also provided on the OE352 and
OE353 Modular I/O Base Boards for
addressing of the OE357 - Expansion
Board(s).
The relay outputs are N.O. contacts with
one common terminal. All outputs and
the relay common are electrically iso-
lated from all other circuitry on the
board. All relay outputs are supplied
with transient suppression devices
across each set of contacts to reduce
EMI and arcing. The relay output con-
tacts are rated for pilot duty control at a
maximum of 2 Amps @ 24 VAC or 24
VDC.
Technical Data OE357 – 4 Relay Output
Modular Expansion Board
Operating
Power From OE352/OE353
Modular I/O Board
Power Consumption 2 VA Maximum
Operating Temp 10
°
F to 149
°
F Operating Humidity 90% RH Non-Condensing
Communications Integral I
2
C Chip Weight 4 oz
Outputs:
Relay Qty. 4 Relay Contact Rating 2 Amps @ 24 VAC
Three Year Warranty WattMaster reserves the right to change specifications without notice
OE357 - 4 Relay Output
Modular Expansion Board