User Manual

Signal and sensor error info via display front 4501

Sensor error (see limits in the table) is displayed as SE.BR (sensor break) or

SE.SH (sensor short). Signals outside the selected range (not sensor error,

see table for limits) are displayed as IN.LO indicating low input signal or

IN.HI indicating high input signal. The error indication is displayed in line 3

as text and at the same time the backlight flashes. Line 4 of the display is a

status line which displays status of relay 1 and relay 2, COM (flashing bullet)

indicating correct functioning of 4501 and arrow up/down which indicates

tendency readout of the input signal. If the figure 1 or figure 2 flashes, the

unit has detected that the setpoint has been exceeded and that the relay is in

“delay” mode. When the delay time has passed and the relay makes/breakes,

the relay sign either displays or disappears.

Signal and sensor error indication without display front

Status of the unit can also be read from the red/green LED in the front of the device.

Green flashing LED 13 Hz indicates normal operation.

Green flashing LED 1 Hz indicates sensor error.

Steady red LED indicates internal error.

Relay functions

6 different settings of relay function can be selected.

Setpoint: The unit works as a single limit switch

Window: The relay has a window that is defined by a low and a high

setpoint. On both sides of the window the relay has the

same status.

Error function: The relay is activated by sensor error.

Power: The relay is activated as long as the power is on.

Off: The relay is deactivated.

Latch: The relay is latched. Only valid for setpoint and window

function.

Increasing/decreasing: The relays can be set to activate at increasing or

decreasing input signal.

Delay: An ON and an OFF delay can be set on both relays in the range

0...3600 s.

Hysteresis: A hysteresis can be set at 0.1...25% of the span or between 1 and

2999 counts.

Latch

When the setpoint is exceeded the relay outputs enters an alarm state. The

latch function of the 4116 will hold the relays in this state until the function