Technical data

88
Temperature Controllers
Series HT 55
The self-optimizing compact dual controller
HT 55 is a universal controller for machine, system and equipment
engineering thanks to its confi gurability and compact construction.
When designing this device, special value was attached to simple
and clear handling. Easy mounting on normed rails and the
removable connectors (plug blocks) also guarantee operations in
diffi cult installation conditions.
Power supply:
230 Volt AC / 50 Hz or 24 Volt DC 115 Volt AC
/ 50 - 60 Hz optional
Noise immunity:
EN 50 082-2
Emitted interference:
EN 50 081-1
Sensor type:
Fe-CuNi (J), NiCr-Ni (K), PT 100 DIN/IEC, Sen-
sor breakage safeguard, sensor polarity reversal
control, sensor short-circuit control
Fault limit:
1.0% of relative temperature
Actual / rated value:
3-digit LED-display (13 mm) scan-operation
between channel 1 and 2
Display /
measurement range:
-199 up to +999 digits
Controller output A:
via 2 internal Triacs, max. power 1200 W both
channels together
Controller output B:
via 2 mechanical switching relays 16 A, switch-
ing power 2 x 1500 W at 230 V AC
Controller output C:
2 x 12 V DC to trigger Solid State Relays for
switching high powers
Confi guration:
as double-controller, each channel separately
confi gured as Safeguard, one channel survey-
ing the other as controller / limiter
Special functions:
Self-optimizing of controller parameters, easy
adaption to respective environment Safety oper-
ation mode by connecting the relays before the
Triac control to switch off on false alarm Setting
limits and setting correction adjustable Fastening
on 35 x 7.5 mm carrier rail per DIN 50022
Optional:
2 independent 4 - 20 mA inputs for external set-
ting of both channels; equipped with multipole
sockets matching our complete heating system
Protection grade:
IP 40, with housing IP 65
Protection class:
I without housing, II with housing
Measurements:
72 x 70 x 90 mm (H x W x D)
Connections:
Pluggable connectors
Operation:
Parameter assignment and confi guration using
four pushbuttons
HT 55
HT 55 H