• Power Monitoring is a series-parallel
connection
of monitor contacts that are forced-guided (mechanically linked) from each
device controlled by the EZ-SCREEN. The monitoring contacts should
transition
within 200 milliseconds of the OSSD outputs
switching ON or OFF. If the
transition
results in an open
condition
on pin 8 (Reset/Test input) longer than 200 ms, a Test cycle
will turn OFF the OSSD outputs. Refer to
Generic Wiring to FSDs (manual reset)
on page 33 and
Module (2-Channel EDM, Manual Reset)
on page 34 for Power Monitoring hookup.
• No Monitoring. Use this
configuration
initially,
in order to perform the
initial
25. If No Monitoring is selected, the user must ensure that any single failure of the external devices does not result in a
hazardous
condition
and, in such a case, a successive machine cycle will be prevented. To
configure
the System for No
Monitoring, simply do not interface the Power Monitoring circuit (i.e., the four forced-guided normally open contacts from each
device) and connect directly to +24V dc.
CAUTION: EDM Monitoring
If the system is
configured
for "No Monitoring," it is the user’s responsibility to ensure that this does not create a
hazardous
situation.
4.4.5 Preparing for System
Operation
After
the
initial
trip test has been accomplished, and the OSSD safety outputs and EDM
connections
have been made to the machine to
be controlled, the EZ-SCREEN Type 2 is ready for
testing
in
combination
with the guarded machine.
The
operation
of the EZ-SCREEN Type 2 with the guarded machine must be
verified
before the combined System and machine may be
put into service. To do this, a
Qualified
Person must perform the Commissioning Checkout Procedure described in
4.5 Reference Wiring Diagrams
4.5.1 Generic
Emitter
Wiring Diagram
+24V dc
0V dc
Bn (#1)
Gn/Ye (#7)
Bu (#6)
Bk (#5)
Wh (#4)
Vi (#8)
Or (#3)
Or/Bk (#2)
n.c.*
n.c.*
n.c.*
n.c.*
n.c.*
Figure 18.
Emitter—Generic
Wiring Diagram
Note: *Pins 2, 3, 4, 5, and 8 are not connected or are connected in parallel to the same color wire from the receiver cable.
EZ-SCREEN
®
Type 2 Light Screen
32
www.bannerengineering.com - Tel: 763.544.3164