Technical data

94
Temperature Controllers
Series HE / HER
Electronic load relay
Electronic load relay SSR 25 A
The HER 25 load relay is a ready to install electronic power con-
troller unit for electrical heating. It should be used for continuo-
us operation with a high actuation frequency. By comparison to
the electromechanical relay or contactor, no wear to the actuation
contacts is possible.
HER 25 is prepared for DIN rail use (TS 35), completely fi tted with
heat sink as well as over-voltage protection.
Load voltage:
24 - 230 V AC
Load current:
0.2 - 25 A AC 1
Protection class:
II
Protection grade:
IP 20 (EN 60529)
Terminal cross section:
10 mm
2
Ambient temperature:
max. 40°C 25 A, max. 60°C 20 A
Housing dimensions:
120 x 45 x 1100 mm (H x W x D)
Control voltage
HER 25 D
5 – 24 V DC
HER 25 A
24 – 230 V AC
Solid state relay - set SSR 20 A
This electronic relay can be installed anywhere in a housing in a
space-saving manner.
For high load currents, fi tment in a metal housing is recommended,
so as to ensure adequate cooling.
Load voltage:
24 to 280 V AC 1 (600 V peak)
Load current:
0.2 to 25 A AC 1 (max. load)
Protection class:
I
Protection grade:
IP 20 (EN 60529)
Heat loss:
For a switch capacity exceeding 5 A, steps must be
taken to ensure adequate cooling.
Housing dimensions:
45 x 57 x 23 mm (H x W x D)
Note:
Even when not energized, solid state relays allow
residual current to fl ow. For this reason, fi t a mains
switch or contactor upstream.
Control voltage
HED
3 – 32 V DC
HEA
90 – 280 V AC