Oldham WX16, User Manual

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WX16 User Manual | 7
AVERAGE buffer overflows and the message ERROR appears in the AVERAGE field.
Exiting this screen resets the buffer and clears the error message.
1.2 Specifications
1.2.1 DC Power Supply Requirements
Standard WX16 power requirements are 10-30 VDC @ 3 watts applied to terminals 9
& 11 of TB2 on the standard I/O PCB (see section 3.0). Optional features increase
power consumption as described below:
•
Discrete Relay PCB option; add 2 watts per PCB (assumes all 8 relays are
energized).
•
Analog Input PCB option; add 1/2 watt.
•
4-20mA Output PCB option; add 1 watt.
•
Catalytic Bead Sensor Input option; add 12 watts max (assumes maximum sensor
power consumption).
•
TB2 terminals 10 & 12 of the standard I/O PCB provide a maximum of 500mA
fused output power for powering of auxiliary external devices such as relays,
lamps or transmitters. Power consumed from these terminals should be
considered when calculating system power consumption.
1.2.1a 150 Watt AC – 24 VDC Power Supply
* 110-120 VAC @3.2A max
* 220-240 VAC @ 1.6A max
* A slide switch on the front of the power supply selects AC input range.
The 10-0172 150 watt power supply (Figure 3.8) is for powering the WX16 and up to
16 detectors. A minimum of 5 watts per channel is available for powering of external
transmitters.
1.2.2 Relays
Common relays are standard and menus provide voting logic for
ALARM 1, ALARM 2, FAULT and HORN. Discrete relays are optional. All
relays are rated at 5 Amp for 28 VDC and 250 ~VAC
RESISTIVE loads.
IMPORTANT : Appropriate diode (DC loads) or MOV (AC loads) snubber devices must
be installed with inductive loads to prevent RFI noise spikes. Relay wiring should be
kept separate from low-level signal wiring.
1.2.3 Ambient Temperature Range
-25 to 50 degrees C
1.2.4 Humidity Range
0 TO 90% R. H. Non-Condensing.