HYDAC ETS 1700 - Manual (Page 3)

°C
HYDAC ETS 1700
ON
OFF
m o
d
e
SP1
ON
OFF
SP2
ON
OFF
m
a
x
SP4
ON
OFF
SP3
e
e
r
s
t
+
_
undo screws
4-digit
keys for setting the switching points
operating panel
to remove
digital display
and additional functions
5. Digital display
After switching on the supply voltage, the unit briefly displays ”ETS” and then displays the
current temperature.
2 s
Notes:
• In the basic settings the display can be altered so that, once switched on, the unit displays a
switching point or the maximum value permanently. In this case ”S.P. 1”, ”S.P. 2”, ”S.P. 3”,
”S.P. 4”, or ”MAX” appears briefly on the display following the switch-on message. The
current temperature can be displayed briefly by pressing the ”+” or ”-” key.
• If the current temperature exceeds the nominal temperature of the unit, it can no longer be
displayed and the display begins to flash.
• If the current temperature is below 0.5 °C, then 0 is displayed.
6. Output function
6.1 Relay outputs
The ETS 1700 has 4 relay outputs. One switching point and one switch-back point and/or one
hysteresis can be set for each relay. The appropriate relay pulls in when the pre-set switching
point is reached and drops back when the temperature falls below the switch-back point.
Whether the unit operates with adjustable hystereses or adjustable switch-back points is
determined via the ”switch-back mode”, in the basic settings (see Point 8).
Switch-back mode is set to "hysteresis":
The pre-set hysteresis determines the switch-back point (switch-back point = switching point
minus hysteresis).
Switch-back mode is set to ”switch-back point”:
The switch-back point is set directly.