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7
Installation and Operation
Manual
Series A3 & A4
Two 3/16” pressure connections are located on the back of the unit, labeled
“High” and “Low”. For best results, connect 3/16” I.D. push on tubing to the
pressure connections. If the High connection has a greater absolute value than the
Low connection, the front display will give a positive value. If the HI connection
has a lower absolute value than the LO connection, the front display will give a
negative value.
NOTES:
1. Supply Voltage is universal from
16-265VAC or VDC
2. For internally sourced 4-20 mA loop,
maximum loop resistance is 750
Ω
;
for
externally sourced loop at 36 VDC,
maximum loop resistance is 1800
Ω
.
3. Isolation:
Relays: 1000 VAC to all other inputs and
outputs
4-20 mA: 5000 VAC to all other inputs
and outputs.
2.2 Pressure Connections
2.3 Electrical Connections
