Max Machinery 120 FLOW RATE & TOTAL INDICATOR - Manual (Page 3)

120-200-350 © 1993 (Rev 5/97) Max Machinery, Inc. Page 3
General Description (cont.)
The rate meter displays zero rate when the time interval between input pulses exceeds the
programmed rate zero time. The timer can be set from 1 to 15 seconds.
The rate units of measure (up to three characters) can be programmed into the unit and will
be shown along with the rate value and rate setpoints on the display. If the rate data exceeds
four digits, the rate header will be shifted off the display one character for each additional
digit.
The analog rate output range can be programmed at both the 4 mA and 20 mA points. This
permits analog rate indications from 0 to full scale rate or a portion of the rate range. The
analog output can be digitally calibrated in the program mode. The analog output goes to a
value of 4 mA when the unit is being programmed and during power-up diagnostic tests.
Note: This device has a maximum output of 20mA and therefore will not indicate an
overrange condition.
Specifications
• Environmental
Temperature: Operating: 0 to 55
°
C
Storage: -40 to 70
°
C
Humidity: 0 to 85% RH non-condensing
Pollution: Pollution Degree II
Front Panel: Sealed to NEMA 4X
• Inputs
Power: 115/230V 50/60 Hz 0.2/0.1 A
or 18 to 27 VDC @ 0.4 A max. 5 W max.
115/230V devices to be installed as category II over voltage.
Control Inputs (5)
Type: Requires current sinking device such as contact
closure to ground or NPN transistor to ground.
Impedance: 5.8k
Ω
to +5 VDC
Voltage: High 3.5 to 24 VDC Low 0.0 to 1.0 VDC
Response Min. Low 30 mS, min. high 30 mS
Flow Input/Totalizer Inhibit
Type: Requires current sinking device such as contact
closure to ground or NPN transistor to ground.
Impedance: 5.8k
Ω
to +5 VDC
Voltage: High 2.8 to 24 VDC Low 0.0 to 1.3 VDC
Response: High 0 - 7.5 kHz, min. pulse width 50
µ
S
Med. 0 - 400 Hz, min. pulse width 1.25 mS
Low 0 - 40 Hz, min. pulse width 10 mS
GENERAL DESCRIPTION / SPECIFICATIONS