3RS1540-2HB80

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The 3RS14 and 3RS15 temperature monitoring relays for IO-Link are used to measure temperatures in solid, liquid and gas media. The temperature is calculated using a sensor in the medium, evaluated by the device and monitored for overshooting or undershooting a working range (range monitoring).

The digital temperature monitoring relays have two separately adjustable limit values, are non-volatile and can be operated as desired using the open- or closed-circuit principle.

The devices differ in terms of the number of temperature sensors which can be evaluated. 3RS1440 and 3RS1540В temperature monitoring relays for IO-Link are digitally adjustable for one sensor and are an effective alternative to temperature controllers for low-end applications (two-step control or three-step control).

The devices with two-step control can, for example, be used as a thermostat. The devices with three-step control can, for example, independently switch between heating and cooling.

3RS1441В temperature monitoring relays for IO-Link are digitally adjustable and can evaluate up to three resistance sensors at the same time. The devices were designed specifically for monitoring motor windings and positions.

The temperature monitoring relays are powered through the control supply voltages IO-Link (L+) and earth (L-) or via an external 24 V DC power supply.

Monitoring

Once the temperature has reached the set threshold П‘1, the output relay K1 changes its switching state as soon as the set time t has elapsed (the K2 output relay responds in the same manner to П‘2). The delay time can be adjusted.

The output relays return immediately to their original state once the temperature reaches the respective hysteresis value.

When the temperature reaches the upper limit value П‘1, the output relay K1 changes its switching state as soon as the set time t has elapsed. The output relay returns immediately to its original state once the temperature reaches the respective hysteresis value.

K2 responds in the same manner to the lower threshold П‘2. Both thresholds, П‘1 and П‘2 can be parameterized for overshooting or undershooting. This makes it possible to use a limit value for issuing an alarm signal to announce that a value a limit value is about to be overshot or undershot.

Note:

The "Temperature monitoring mode" parameter can be used to set the desired type of monitoring (monitoring for overshooting or undershooting or range monitoring).