Elgas DATCOM, Operating Instructions Manual

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5
Installation and Commissioning
73
Fig. 30 Connecting gas meter with SCR encoder to ELCORplus
5.6.3 Connecting Binary Inputs
ELCOR - Terminal DI2 is the standard for binary input connection. If the DI3 terminal or DI1 has
not been used to connect the gas meter, these terminals also can be used.
ELCOR plus – One of the fee terminals DI1 to DI4 can be used to connect binary inputs, if they
have not been used to connect the gas meter.
ATTENTION!
Signals on all digital inputs (DIN terminals) are intrinsically safe. The sensors
connected to these terminals must be:
 Either intrinsically safe with the corresponding IS parameters,
 Or they must fall under the “Simple Device” category according to [4],
 Or they must be connected via a safety barrier.
Connection Cable Entry Recommended type of cable Cable Ø
Binary input (single) 2-wire
shielded
PG7
Unitronic LiYCY 2 x 0.25
Lappkabel
4.5 mm
Binary input (double) 3-wire
shielded
PG7
Unitronic LiYCY 3 x 0.25
Lappkabel
4.7 mm
Binary input (triple) 4-wire
shielded
PG7
Unitronic LiYCY 4 x 0.25
Lappkabel
5.0 mm
Binary input (four times) 5-wire
shielded
PG 7
Unitronic LiYCY 5 x 0.25
Lappkabel
5.6 mm
Table 5 Cables recommended to connect binary inputs