3
2 Operation
2.1 Installation instructions
Place the measuring instrument into the designated cut-out (according to DIN 43 700, dimensions:
92mm x 45mm) on the front of your device frame. Please use the enclosed fastening parts to attach the
instrument. Tighten the fastening bolts alternately until the instrument is securely fastened. When plac-
ing this instrument, consider any radiant heat of neighbouring devices, and also take into account the
permissible ambient temperature.
Respect any applicable regulations (e.g. VDE 0100) when making electrical connections. The power
supply voltage, as indicated on the electrical rating label, is connected to terminals 15 and 16.
2.2 Inbetriebnahme
Connect the measurement and power-supply lines to the appropriate terminals and switch on the power
supply. The instrument will first perform an automatic display segment test, and all LEDs and display
segments will light up for about one second. After this test, the previously active mode of operation is
set. Any measured values will then be shown on the display continuously.
Terminal pin assignment:
3
1 2
4 5 6 7 8 9 10 11 12 13 14 15 16
GK 2
GK 1
Limit Contact
Supply
100 ... 264 V
AC
24 V
DC
~ ~
-
+
S P Ö S P Ö
RxDGND TxD
Seriel Interface
0 ... 10 V GND 0 ... 20 mA
Analog output
+10 V-10 VGND
Sensor supply
N L
Voltage
L L’
Current
intern shorted
2.3 Controls
The CPM 138 is controlled by four push buttons on the front of the instrument.
LED for target value 1
LED for target value 2
Button: NEXT, UP, DOWN, SELECT
