Omicron CMC 356, User Manual

Page: 54 / 142

CMC 356 Reference Manual
54
6.3.6 Low-Level Binary Outputs ("ext. Interf.")
The SELV interface connector "ext. Interf." holds four additional transistor
binary outputs (Bin. out 11 - 14). Unlike regular relay outputs,
Bin. out 11 - 14 are bounce-free binary outputs (small signals) and have a
minimal reaction time.
In addition, two high frequency counter inputs for up to 100 kHz are
available for the testing of energy meters. They are described in section
6.4.2, "Counter Inputs 100 kHz (Low Level)" on page 61.
Figure 6-11:
Pin assignment of "ext.
Interf." (upper 16-pole
Lemo socket); view onto
the connector from the
cable wiring side
Table 6-11:
Data of the low-level
binary outputs 11 - 14
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 Reserved
Housing Screen connection
4 Low-Level Transistor Binary Outputs (Bin. out 11 - 14)
Type Open-collector transistor outputs;
external pull-up resistor
Switching voltage Max. 15 V
Max. input voltage ±16 V
Switch current Max. 5 mA (current limited); min. 100 µA
Actualization time 100 µs
Rise time
< 3 µs (V
extern
= 5 V, R
pullup
= 4.7 k
Ω
)
Connection Connector "ext. Interf." ( CMC 356 rear side)
Insulation Reinforced insulation to all other potential
groups of the test equipment. GND is
connected to protective earth (PE).