Operating instructions

Electrical installation
4.9 Other connections
Drive converter cabinet units
90 Operating Instructions, 10/2008, A5E00288214A
The PT100 evaluation unit can monitor up to six sensors. The sensors can be connected in a
two or three-wire system. With the two-wire system, inputs Tx1 and Tx3 must be assigned.
With the three-wire system, input Tx2 must also be connected (x = 1, 2, ...6). The limit values
can be freely programmed for each channel. Shielded signal cables are recommended. If
this is not possible, however, the sensor cables should at least be twisted in pairs.
In the factory setting, the measurement channels are divided into two groups of three
channels. With motors, for example, this means that three PT100s in the stator windings and
two PT100s in the motor bearings can be monitored. Unused channels can be suppressed
via parameters.
The output relays are integrated in the internal fault and alarm train of the cabinet unit. The
messages can also be picked up by the customer via two spare signaling relays. Two user-
programmable analog outputs (0/4 to 20 mA and 0/2 to 10 V) are also available for
integration in a higher-level controller. The power for the PT100 evaluation unit is supplied
and the evaluation itself executed within the converter.
In the event of a fault, the "external alarm 1" (A7850) and "external fault 1" (F7860) are
triggered.
Connection
Table 4- 35 Terminal block -A1-B140 – connection for evaluation unit PT100 resistors
Terminal Designation Technical specifications
T11-T13 90–240 V AC/DC; PT100; sensor 1; group 1
T21-T23 90–240 V AC/DC; PT100; sensor 2; group 1
T31-T33 90–240 V AC/DC; PT100; sensor 3; group 1
T41-T43 90–240 V AC/DC; PT100; sensor 1; group 2
T51-T53 90–240 V AC/DC; PT100; sensor 2; group 2
T61-T63 90–240 V AC/DC; PT100; sensor 3; group 2
51/52/54 90–240 V AC/DC
Relay output limit value group 1 reached; (changeover contact)
61/62/64 90–240 V AC/DC
Relay output limit value group 2 reached; (changeover contact)
Ground _ OUT 1
U1 OUT 1
I1 OUT 1
0/4–20 mA
0/2–10V
Analog output out 1, sensor group 1
Ground _ OUT 2
U2 OUT 2
I2 OUT 2
0/4–20 mA
0/2–10V
Analog output out 2, sensor group 2
Max. connectable cross-section: 2.5 mm²
Diagnostics
Messages output during operation and in the event of faults (meaning of LEDs on -B140) are
described in the "Additional Operating Instructions" of the Operating Instructions.