Omicron CMC 310, Руководство пользователя

Страница: 32 / 44

CMC 310 User Manual
32 OMICRON
4.5.2 Counter inputs 100 kHz (low level)
The SELV interface connector ext. Interf. holds 2 high-frequency counter inputs for up to 100 kHz which
are used for testing energy meters.
In addition, 4 additional transistor binary outputs ( BINARY OUTPUT 11–14 ) are available. They are
described in section 4.4.4 "Low-level binary outputs (ext. Interf.)" on page 26.
Pin assignment of the external interface ext. Interf. (upper 16-pole LEMO socket); view onto the
connector from the cable wiring side:
2 counter inputs
Maximum counter frequency 100 kHz
Pulse width >3 µs (high and low signal)
Switch threshold
Pos. edge
Neg. edge
Max. 8 V
Min. 4 V
Hysteresis Typ. 2 V
Rise and fall times <1 ms
Maximum input voltage ±30 V
Connection Socket ext. Interf. (rear side of CMC 310 )
Insulation Reinforced insulation to all other potential groups of the test
equipment. GND is connected to protective earth (PE).
Pin Function
Pin 1 Counter input 1
Pin 2 Counter input 2
Pin 3 Reserved
Pin 4 Neutral (N) connected to GND
Pin 5 Binary output 11
Pin 6 Binary output 12
Pin 7 Binary output 13
Pin 8 Binary output 14
Pin 9–16 Reserved
Housing Screen connection