4.0 Loop Circuits
The following recommendations apply specifically to EASICHECK™ loop circuits:
"The EASICHECK™ Panel is a one loop Addressable emergency lighting test system.
"The loop circuit has provision for a maximum of 250 SCAEL Interfaces.
"Each SCAEL Interface has it’s own individual address which can be programmed by
using the EASICHECK™ programmer.
"The recommended cable should be used for the loop circuit.
(see Cable Types section)
"The total length of cable in the loop circuit should not exceed 2km (including all spurs)
"Since SCAEL Interfaces receive/send signals in either direction, a complete loop or
ring circuit is preferred (see diagram) so they continue to function if an open circuit
occurs.
"Isolator units can be installed at intervals throughout the circuit to prevent a short circuit
fault disabling the complete loop.
"It is important to check the voltage drop to ensure the supply to any SCAEL Interface
does not fall below 15V DC.
4.1 Isolators
For spur circuits, it is preferable for circuit integrity to fit an isolator at each spur. For loop
circuits it is preferable to fit an isolator every 15 to 20 fittings
9
EASICHECK™
-
-+-+
+
-
+

ISOLATOR

Fault Indicator
TELE/LOOP
LOOP WIRING

PART No: 7466-0005

4063.100.000
Note: Unlike the SCAEL Interfaces,
the loop polarity must be observed.