APG RCU-7000 user manual - Manual (Page 14)

RCU-7000 Series Rev. A1, 4/07
14
Automation Products Group, Inc.
APG...Providing tailored solutions for measurement applications
Tel: 1/888/525-7300 • Fax: 1/435/753-7490 • www.apgsensors.com • [email protected]
(a) When the l
4
switch actuate as level rises, relay (no. 3) energize.
(b) When the l
1
switch de-actuate as level falls, relay (no. 1) energize.
(c) Relay (no. 2) may be used for control functions such as latching for pump
control.
Caution: Actuation direction of all switches must be “upper ON” (NO)
WARNING: Earth terminal “4” shall be grounded. If it is not grounded, you
will get an electric shock.
Wiring Diagram for Dual Pumps Emptying
with High Alarm (ELS Sensor)
Note the following points:
• Do not connect the multiple relay units to same level switch. Relay units
will malfunction.
• Power supply must be connected in phase
(• To avoid malfunction, the wiring distance should be used within
specifi cations. (Refer to Specifi cations). If the wiring distance exceed
specifi cations, the relay unit may be malfunction by tray capacitance
between cables or noise.