Limit Value Switch GS125M with Universal Input and Wide-Range Mains Adaptor
- universal input for industry standard signals, Pt100, thermocouple and potentiometer
- 1 relay output
- adjustable min/max contact function
- 2-colour illuminated scales for limit value adjustment
- monitoring of sensor break and short-circuit with Pt100 sensors
- wide-range mains adaptor
- functional safety up to SIL2
- housing width only 12.5mm
- removable coded terminals
- carrier rail mounting TS35 EN60715
- safe galvanic isolation between input/output and auxiliary voltage
This limit value switch is used in switch cabinets for process monitoring or for simple process regulation.
Both temperatures and derived variables such as voltage, current and resistance are used as control signals. In the process, 1 or 2 limit values can be monitored.
The universal configurability of the measuring inputs reduces the stock requirement for various applications.
The housing widh of only 12.5mm enables space-saving installation in the switch cabinet. The scales for the limit value setting, illuminated red or green depending on the switch status, also enable operatingin dark environments.
For the assignment of the measuring unit to the scale labelling, 24 transparent adhesive labels are supplied. They can be fixed between the adjusting wheels on the front panel.
Measurement inputs, selectable via DIP switch:Industry standard signals: 0/2...10V
0/4...20mA
Potentiometer: 500 Ohm ... 20kOhm
Pt100: 0...50°C
0...100°C
0...150°C
0...200°C
0...300°C
0...500°C
Thermocouple
FeCuNI, type J: 0...250°C
0...500°C
NiCrNi, type K: 0...500°C
0...750°C
0...1000°C
PtRhPt, type S: 0...1500°C
Technical data:supply voltage: (wide-range power supply): 20...125VDC and
20...250VAC (47...63Hz), max. 1,5W
rated voltage: 253VAC
test voltage: 3kVAC between input/relay output and auxiliary voltage
operating temperature: -10...+60°C
storage temperature: -20...+80°C
air humidity: 10...90% (non-condensing)
Measurement inputs
voltage: 0/2...10V, Ri ca. 20kOhm
current: 0/4...20mA, Ri ca. 60 Ohm
Pt100: linearised, measurement current approx. 1.6mA
relays become inactive if there is a sensor break or short-circuit
thermocouple: linearised with cold junction compensation
resistance: (3-wire), nominal value 500 Ohm ... 20kOhm
internal reference voltage ca. 1.5V
Relay output, 1 changeover contactswitching voltage: <250VAC, <2A, < 500VA
<125VDC, <0,2A, <25W
<30VDC, <2A, <60W
switching frequency: max. 5Hz
switching hysteresis: ca. 1%
Functional safety: SIL2 in accordance to EN61508
Setpoint setting: scale precision: 2%
Actual value output (option): 4...20mA, burden max. 120 Ohm, no galvanic isolation from the input signal
Options against extra charge:
actual value output
push-in terminals
supply voltage 24VDC with carrier rail bus connection
2 output relays (universal connection)
2 output relays (potential-free N.O. contacts)
