Siemens HydroRanger 200 - Relays; General Introduction; Relay Function; Alarm

7ML19985FC03 HydroRanger 200 – INSTRUCTION MANUAL Page 39
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Relays
Relays
Relays are the primary controls of external devices such as pumps or alarms.
The HydroRanger 200 comes with extensive control and alarm functions.
General Introduction
Depending on the model, up to six onboard multi-purpose relays are provided on the
HydroRanger 200. Each relay may be independently assigned to one function and has a
corresponding status icon on the LCD.
The relay functions fall under three modes of operation:
Relay Function
Alarm
Level
In high alarm, the function goes on when the level rises to the ON setpoint and goes off
when the level lowers to the OFF setpoint. In low alarm, the function goes on when the
level lowers to the ON setpoint and goes off when the level rises to the OFF setpoint.
In Bounds [6 relay model]
The relay will be in alarm if the level is inside the zone between the setpoints.
Out of Bounds [6 relay model]
The relay will be in alarm if the level is outside the zone between the setpoints.
Rate of Change [6 relay model]
In filling alarm, the function goes on when the rate of filling increases to the ON setpoint
and goes off when the rate of filling drops to the OFF setpoint. In emptying alarm, the
function goes on when the rate of emptying increases to the ON setpoint and goes OFF
when the rate of emptying drops to the OFF setpoint. For emptying alarm, the setpoints
must be entered as negative values.
Mode Function
alarm alarm ON = LCD Icon ON = relay coil de-energized
pump pump ON = LCD Icon ON = relay coil energized
miscellaneous contact closed = LCD Icon ON = relay coil energized
Note: The HydroRanger 200 can be programmed with relays. The number of
relays installed depends on the model. To determine the number of available
relays that can be utilized in your HydroRanger 200, open the lid and count the
large white relays to the left of the display. It is important to count the number of
on-board relays as the software will allow programming of up to six relays
whether they are installed or not.