18 Installation
HP-327 HIT-4U
Flowmeter Input
The flowmeter input accepts a low-level sinusoidal signal from a
magnetic type pickup coil, contact closure or DC pulse signal. An
optional circuit board (PCA193) provides an input that will accept a
signal from MCP/RF type pickups. Switches 1,2,3,4,5,6 on SW-1 must
be set according to the type of pickup coil to be used.
SW-1 SWITCH SETTINGS FOR FLOWMETER INPUT OPTIONS
INPUT OPTION SW-1 SETTINGS
Magnetic pickup
Contact Closure
1,2,3 - ON
4,5,6 - OFF
1 2 3 4 5 6
RediPulse
TTL
1,2,3,5 - OFF
4,6 - ON
1 2 3 4 5 6
RediPulse
Open Collector
*MCP/RF
1,2,3,6 - OFF
4,5 - ON
1 2 3 4 5 6
* PCA193 is required and J2 must be equipped for MCP/RF
3.1 4-20 mA Current Loop
When powered from a two-wire 4-20 mA current loop, a minimum
supply voltage in the range of 8-30 Volts DC is required, depending on
the loop load resistance. At nominal 250 Ohms loop resistance the
minimum power supply is 13V.
Backup batteries are included to ensure that volume accumulation will
not be interrupted during a power failure.
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