Datalogic SG4 FIELDBUS Series, Instruction Manual, Page: 83 / 136

CASCADE (SG4-P MODELS)
INSTRUCTION MANUAL 73
CASCADE (SG4-P MODELS)
A dedicated Bus provides the connection between Master and Slave units. The same
bus is used to connect SG4-DONGLE which links the light curtain to Ethernet.
A proprietary transmission protocol for bus is used to communicate to slaves safety
related information and status.
OSSDs are physically connected to master unit only; only the master unit can control
their status.
If transmission fails, due to a stuck-at fault or a signal degradation, master and slave
units go in failure lock-out condition.
A maximum of three units (master and two slaves) can be connected in a cascade con-
figuration (a maximum of 160 beams for 30mm resolution models and a maximum of
320 beams for 14mm resolution models).
The maximum length of the master unit is 1800mm and the maximum length of each
slave is 1200mm. For the correct connection of the units in a cascade configuration, the
right cables have to be used (CS-F1-80-B-01, CS-F1-80-B-005, CS-F1-80-B-0005 on
"
Accessories" on page 92
).
30 mm resolution models max. 160 beams
14 mm resolution models max. 320 beams
A safe auto-recognition procedure at startup is implemented; it automatically detects
cascade topology and correctly address units.
To allow auto-recognition, it is mandatory to connect the termination cap (supplied on
kit) on the tail connector of last cascade unit, in both transmitter and receiver unit.
If this connection misses, Master and Slave units go in critical Communication failure.
Cascade connection
The Cascade connection can be done by using two or three Light Curtains (Standard
Model), which can have different length and resolution.
The cascade configuration can reach a maximum of 160 beams for 30mm resolution
models and a maximum of 320 beams for 14mm resolution models. The maximum
length of the master unit is 1800mm and the maximum length of each slave is 1200mm.
MAX. 3 UNITS (MASTER AND 2 SLAVES)