Liquid Controls SP714-S2i - Manual (Page 7)

InstallatIon overvIeW
Installation Overview
In order to maintain IECEx compliance, the SP714-S2i is shipped as part of an assembly with a Sponsler turbine
flowmeter. A complete installation of the flowmeter and pulse amplifier assembly includes the physical installation of
the flowmeter and the electrical installation of the SP714-S2i. Guidelines for the physical installation of the flowmeter
can be found in the Sponsler turbine flowmeter manual. Instructions for the electronic installation of the SP714-S2i are
included in this manual.
Installation overview for the SP714-S2i:
1. Install Sponsler turbine flowmeter (with SP714-S2i) into system piping. Sponsler Turbine Flowmeter Installation Manual
2. Wire the SP714-S2i to a pulse acquisition device and set the S1 switches to the preferred output signal characteristics. Page 7
3. Perform field test and adjust the input signal sensitivity (if necessary). Page 11
Use the proper cable glands, conduit connectors, cables,
conduit, and installation procedures when wiring the SP714-S2i.
Installations must be in full accordance with national and local
codes to maintain the hazardous location ratings on the product.
Observe National and Local Codes
WIrInG the outPut sIGnal confIGuratIons
The SP714-S2i can be set to one of three configurations: 2-wire Standard, 3-wire TTL Sourcing, and 3-wire Open
Collector. The 2-wire Standard configuration translates the output signal from the turbine flowmeter’s pickup coil into
a current value. 2-wire connections are effective transmitting the signal over long distances. The 3-wire TTL Sourcing
configuration translates the output signal from the turbine flowmeter’s pickup coil into a voltage value. The output
of the 3-wire TTL Sourcing configuration is driven either positive or negative internally. The 3-wire Open Collector
configuration translates the output signal from the turbine flowmeter’s pickup coil into a voltage value. The output is
driven by an “Open Collector” transistor.
Each configuration requires a specific positioning of the two S1 switches, specific
wiring connections (to the power supply and the pulse acquistition device), and a
resistor(s) spliced into the +V leg from the power supply (optional for the 3-wire TTL
Sourcing configuration).
The best configuration for your application is determined by the specifications of the
pulse acquistion device (typically a flow computer or electronic register) receiving
the SP714-S2i signal and the electrical characteristics of the application.
SW1
S1 J U 4
D1 D2
GND
TB2
S2
R1
TB1
ON ON
1 2
GND
1
S1 Switches
Materials required: not supplied with SP714-S2i
• 18 AWG stranded wire in shielded cable, UL Listed For
ambient temperatures above 70°C, use field wiring suitable for 20°C
above maximum ambient temperature.
• ½-14 NPT cable glands Use Ex d certified cable glands only.
• Connectors for pulse acquisition device or DC power supply
See “Observe National and Local Codes” on this page.
• PTFE tape or pipe sealant
7