Data Sheet
71.91.x.xxx.0300 71.92.x.xxx.0001
5
Thermistor temperature sensing relays for
industrial applications
71.91 - 1 Pole, without fault memory
71.92 - 2 Pole, with fault memory
• Overload protection according EN 60204-7-3
• Positive safety logic - make contact opens if the
measured value is outside of the acceptable range
• Industry standard module
• LED status indication
• 35 mm rail (EN 60715) mounting
1 NO (SPST-NO) 2 CO (DPDT)
10/15 10/15
250/400 250/400
2,500 2,500
500 500
0.5 0.5
10/0.3/0.12 10/0.3/0.12
300 (5/5) 300 (5/5)
AgCdO AgCdO
230 230
24 24
1/0.5 1/0.5
(0.85...1.15)U
N
(0.85...1.15)U
N
——
100 · 10
3
100 · 10
3
<20 / >20 ... <3 kΩ <20 / >20 ... <3 kΩ
<1.3 kΩ / >3 kΩ <1.3 kΩ / >3 kΩ
— / < 0.5 s — / < 0.5 s
—Yes
Yes Yes
–20…+55 –20…+55
IP 20 IP 20
• Thermistor relay
• 1 Pole normally open contact
• 24 V AC/DC, or 230 V AC supply
• Thermistor relay with fault memory
• 2 Pole changeover contacts
• 24 V AC/DC, or 230 V AC supply
• Temperature detection with PTC
• PTC short circuit detection
• PTC wire breakage detection
• Temperature detection with PTC
• Fault memory – switch selectable
• Reset by Reset button or supply interruption
• PTC short circuit detection
• PTC wire breakage detection
Contact specification
Contact configuration
Rated current/Maximum peak current A
Rated voltage/Maximum switching voltage V AC
Rated load AC1 VA
Rated load AC15 (230 V AC) VA
Single phase motor rating (230 V AC) kW
Breaking capacity DC1: 30/110/220 V A
Minimum switching load mW (V/mA)
Standard contact material
Supply specification
Nominal voltage (U
N
) V AC (50/60 Hz)
V AC/DC
Rated power AC/DC VA (50 Hz)/W
Operating range AC
DC
Technical data
Electrical life at rated load AC1 cycles
PTC detecting: Short circuit/Temperature OK
Reset/PTC break
Delay time/activaction time
Fault memory - switch selectable
Electrical isolation: Supply to Measuring circuits
Ambient temperature range °C
Protection category
Approvals (according to type)
Features
71 Series - Monitoring relays 10 A
71.91
71.92
XI-2012, www.findernet.com