R:\Timing\PRODUITS\HL2-33\EN\HL2-33_EN_02-09.doc
12.02.2009
Page 3 / 12
PRINCIPE
The above photocell works perfectly with a distance between transmitter and receiver
of up to 40 m. (130 ft.) in "LOW" position and up to 80 m (260 ft) in "HIGH" position.
PHYSICAL SET-UP
Transmitters are on one side, receivers are on the other. Do not set up in an opposite
manner.
We recommend the use of 4 separate support posts (one for each unit) so that a
disturbance or problem with on post will not case a failure of the entire A/B concept.
Units are placed in as close vertical proximity as possible. Do not separate vertically
by more than 10cm as this may cause alignment, accuracy and triggering problems.
The goal in set up is to make certain the physical set up allows BOTH transmitters to
“cover” BOTH receivers. Only close vertical separation will allow this. DO NOT
attempt to isolate the two sets. The whole idea is to allow either/or of the transmitters
to “cover” the two receivers on the opposite side. In such a set up the physical
redundancy of the two receivers remains completely functional and accurate even if
one of the transmitters should fail.
RECOMMENDED USE
•
The photocells must be placed within close vertical proximity to each other
when used at the same timing line in order to avoid large differences in
triggering times.
•
For added timing system dependability, use these photocells with our HL
553 impulse distributor and optocoupling
•
When the photocells are mounted, connect both transmitters with the
dedicated cable on the SYNCHRO (3 pins plug).
