3
FI002K0018v1530hUK – THS/21 Instruction manual for installation, use and maintenance
INSTALLAZIONE
138 ORIGINAL
INSTRUCTION
3.10.5 EM = S
Photocell at the entrance (PH=IN)
Generic example
S: Metal Detector Probe
N: Conveyor belt
E: Ejector
F: Synchronization photocell
PL: Pack length
DW: Detector width
ED: Ejection distance
PD: Photocell distance
Example with THS-RB
S: Metal Detector Probe
E: Ejector
F: Synchronization photocell
PL: Pack length
DW: Detector width
ED: Ejection distance
PD: Photocell distance
Photocell at the exit (PH=OUT)
Generic example
S: Metal Detector Probe
N: Conveyor belt
E: Ejector
F1: Synchronization photocell
PL: Pack length
DW: Detector width
ED: Ejection distance
PD: Photocell distance
Waveform
Description
Signal over the alarm threshold
with transport activated
Metal alarm
PHOTOCELL
Pack in front of the photocell
(at the entrance, in the example)
ALARM RELAY
External alarm signalling
EJECT RELAY
Ejection signal
YELLOW LAMP
Alarm beacon operation
ED = Ejection distance; BS = Transit speed set on BS parameter or, in presence of an encoder (KE>0), measured;
ET = Ejection relay activation time; AT = Minimum activation time of the alarm relay;
t1 = Alarm time, generally corresponding to the transit of the metal mass through the Probe.
For more accurate adjustment of the delay in activating the ejector, early activation can be adjusted based on the actual
response time of the ejector. See the parameter ERT.
In Conveyor Control Systems, or with encoder installed, the ejection cycle occurs only when the belt is moving.
ALARM RELAY and YELLOW LAMP can be programmed to stay activated, after an Alarm, until a manual reset
(parameter AT)
S
E
DW
PL
PD
ED
ECPD
F1
F2
