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Click
on drawing to view large scale version
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| SmartFan
AmpStrip-AC is a modular current alarm that monitors the
current drawn is a modular current alarm that monitors the current
drawn by AC fans or blowers and generates failure signals if
it drops below a preset trigger current. AmpStrip-AC comprises
a strip of three individual alarm units bused together. The
web separating units is easily cut. Individual units are also
available. |
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| Each
unit monitors and provides alarm outputs for one air mover.
The bus distributes power to each unit and OR’s alarm signals
from each unit to provide an alarm output if any air mover should
fail. Each alarm unit has three outputs used to drive a logic
circuit, LED or piezo alarm. |
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Features
- Supplies nominal
12 mA DC to drive an LED or can also drive a piezo alarm
- Separate alarm
outputs for each fan. Additionally, LED alarm outputs are
OR’d .
- Trigger current
adjustable by shunt to 50 mA, 150 mA, or 0.5 Amps for 2
Amp rated unit; adjustable to 150 mA, 0.5 Amps or 1.5 Amps
for 6 Amp rated unit
- Optional MOS
relay alarm output for high current or high voltage applications
Normally Closed
(NC) Alarm Output: Optically isolated to drive logic circuits.
Closed and can sink at least 0.5 mA at 0.4 VDC above trigger
current. Open below trigger current and will accept up to
30 VDC.
Normally Open
(NO) Alarm Output: Open above trigger current. Closed
below trigger current and applies nominal 12 mA to an LED
connected from NO to L. Piezo alarm can also be used.
OR’d (OR)
Alarm Output: OR’d with other units in AmpStrip. Other characteristics
identical to NO alarm output.
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| SPECIFICATIONS |
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Part
Number
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Units
in Strip
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Power
Line Voltage
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Maximum
Current to a Fan
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Nominal
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Range
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115
VAC
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95
– 135 VAC
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2.0
Amps
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230
VAC
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190
– 270 VAC
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2.0
Amps
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95
– 135 VAC
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190
– 270 VAC
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H110
(1)
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Hardware
Pack
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| Note:
Maximum operating temperature is 65°C ; (1) per alarm unit
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| INSTALLATION |
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| Mounting |
| For
AmpStrip-AC part numbers XX0Q3XX to be used as separate alarms,
cut the web separating alarm units at the designed location
with ordinary cutting pliers. |
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| CONNECTIONS
/ JUMPERS |
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Figure
1 Wiring Diagram
Click
on drawing to view large scale version
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| SUGGESTED
CONNECTING HARDWARE |
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Ref.
Desc.
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Header
on Board (1)
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H110
Hardware Pack
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Quantity
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Description
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Manufacturer
(1)
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Part
Number (1)
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J1
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22-29-2031
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Housing
Terminal (gold)
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J2
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39-28-1043
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Housing
Terminal (tin)
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J3
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22-29-2021
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Housing
Terminal (gold)
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3
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PCB
Support
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Richco
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CBS-4-19
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| (1)
or equivalent |
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| Alarm
Outputs |
| Non-isolated
Alarm Outputs (J1): These outputs are intended to drive
an LED or piezo alarm. Because they are not isolated from the
power line, they cannot be connected to secondary circuits.
An internal current source (9.8-14 mA) is provided at the L
pin. |
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| The
LED or piezo alarm is connected between either NO or OR and
L. An LED connected to NO will light if the fan connected to
that unit draws less than the trigger current. An LED connected
to OR will light if the current to any unit in the AmpStrip
draws less than the trigger current. |
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| Note:
L is positive (+); NO and OR are negative (-) |
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| Isolated
Alarm Output (J3): This output is normally used to drive
a logic circuit. An optically isolated NPN transistor is connected
to pins J3:E (emitter and J3:C (collector). It is normally closed
(NC) and can sink at least 0.5 mA at 0.4 VDC above the trigger
current. When the alarm is open, a maximum of 30 VDC can be
applied. |
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| ISOLATED
AND NON-ISOLATED ALARM OUTPUT LOGIC |
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Alarm
Output
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Above
Current Trigger
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Below
Current Trigger
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Power
Removed from Unit
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NO
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LED/Piezo
OFF
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LED/Piezo
ON
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LED/Piezo
OFF
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OR
|
LED/Piezo
OFF
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LED/Piezo
ON
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LED/Piezo
OFF
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CE
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CLOSED
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OPEN
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OPEN
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