Liquid Controls SCAMP - Manual (Page 4)

4
INSTALLING SCAMP AND MAKING BASIC ELECTRICAL CONNECTIONS
STEP 1. The SCAMP circuit board measures 4” X 3”. Corner mounting holes (0.144” ID)
are provided on 3.640” centers and 2.640” centers, respectively. The circuit board
should be mounted in a suitable environmentally sealed compartment, with the top
surface of the board (surface with terminal strips and switches) positioned to provide
easy access and viewing. Mounting the board to a vertical panel is recommended to
guard against condensation moisture accumulating on the PC board surface.
STEP 2. Connect the SCAMP circuit board to peripheral equipment including 9-18 VDC
power supply, 2-channel quadrature pulser, electronic counter, RTD temperature probe
(optional), and fault indicator/electromechanical counter (optional), as shown in the
diagram below. NOTE: Phase A and Phase B pulser outputs (Terminals 7 and 8) are
unpowered “current-sinking” open-collector outputs. Customer-supplied pull-up resistors
(300-ohm minimum) may be required between terminals 6 – 7, and 6 – 8, if not already
included in the customer-supplied electronic counter.
Term Connection
1
+5V out to power pulser
2 Channel A in from Pulser
3 Channel B in from Pulser
4 Ground to Pulser
5 Ground to Power Supply
6 9 to 18 VDC Power Supply
7 Phase A to Counter
8 Phase B to Counter
9 Fault Output (optional) or low
frequency counter
10 Gnd return for output pulses
24 RTD (optional)
25 RTD (optional)
WARNING! Do not disconnect while circuit is live unless area is known to be non-hazardous.
POWERING UP SCAMP
STEP 3: Carefully check that all wiring has been made in conformance with the
directions in Step 2, and in conformance with all applicable national and local electrical,
environmental, and safety codes and ordinances appropriate for this type of equipment.
Then, turn power on to the unit. The 7-segment LED display on SCAMP should light up
and execute a segment test within approximately 1-second of power being supplied to
the unit.