Ma Current Loop - Hoffer Flow Controls HIT-4U User Manual

Flow-Tech, Inc. | In MD 410-666-3200 - In VA 804-752-3450 | www.flowtechonline.com
18 Installation
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
Magnetic pickup
Contact Closure
RediPulse
TTL
RediPulse
Open Collector
*MCP/RF
* 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.
minimum power supply is 13V.
Backup batteries are included to ensure that volume accumulation will
not be interrupted during a power failure.
HP-327
SW-1 SETTINGS
1,2,3 - ON
4,5,6 - OFF
1,2,3,5 - OFF
4,6 - ON
1,2,3,6 - OFF
4,5 - ON
At nominal 250 Ohms loop resistance the
1 2 3 4 5 6
1 2 3 4 5 6
1 2 3 4 5 6
HIT-4U