Banner EZ-SCREEN LPM Series - External Device Monitoring (EDM)

6.4.4 External Device Monitoring
EZ-SCREEN LPM provides two possible EDM
configurations: 1-channel monitoring and no monitoring. Their functions are
described below. The most common form of EDM is 1-channel monitoring. The installation must prevent short circuits
across the N.C. monitoring contacts and to secondary sources of power.
Safety Output
Closed
Open
OFF
ON
EDM
Don’t CareDon’t CareDon’t CareDon’t Care
250 ms
Max.
250 ms
Max.
250 ms
Max.
6.4.5 External Device Monitoring Wiring
If not connected previously, it is again strongly recommended that one normally closed, forced-guided monitoring contact
of each FSD and MPCE be wired as shown in the monitoring circuit (see
Generic Wiring to FSDs (manual reset) (p. 47) ).
Pin 9 of the receiver connector provide connection for the external device monitoring input.
One-Channel Monitoring: This is a series connection of closed monitor contacts that are forced-guided (mechanically
linked) from each device controlled by the EZ-SCREEN LPM. The monitor contacts must be closed before the EZ-SCREEN
LPM can be reset and the OSSDs can turn On. After a reset is executed and the safety outputs (OSSDs) turn On, the status
of the monitor contacts are no longer monitored and may change state. However, the monitor contacts must be closed
within 250 milliseconds of the OSSD outputs going from On to Off.
Refer to Generic Wiring to FSDs (manual reset) (p. 47) for wiring. Connect the monitor contacts between +24 V DC and
EDM (orange wire, pin 9).
No Monitoring: Use this configuration to perform the initial checkout; see Initial Checkout Procedure (p. 34). If the
application does not require the EDM function, it is the user's responsibility to ensure that this configuration does not create
a hazardous situation.
To configure the System for No Monitoring, connect or jumper EDM (orange wire, pin 9) directly to
+24 V DC.
6.4.6 Emitter Remote Test Input
An emitter connection is provided (Test) for the connection of an external remote test switch (typically a normally open
contact held closed). Opening this switch “turns OFF” the emitter, simulating an interruption of the light beams; all OSSD
outputs will turn OFF. This input is used in conjunction with the emitter Test/Reset DIP switch. See Specifications (p. 14),
System Configuration Settings (p. 64), and Generic Emitter Wiring Diagram (p. 46).
6.4.7 Auxiliary (OSSD Follow/Fault) Output
EZ-SCREEN LPM receivers have an auxiliary status output that provides a PNP current-sourcing output (250 mA max.) that
mirrors the state of the OSSDs or indicates a lockout (ON = Fault). The output is on pin 8 (red wire).
The emitter also has a Fault output that can be enabled to indicate the emitter lockout status (see System Configuration
Settings (p. 64)).
6.5 Reference Wiring Diagrams
Other interfacing modules and solutions are available, see
Accessories (p. 82) and www.bannerengineering.com .
Note: For interfacing modules or remotely located safety I/O blocks where pin 5 of a 5-pin M12 QD is not
earth ground, a 4-pin cordset where pin 5 is not physically present or is not electrically connected can be
used (such as MQDEC-406SS double-ended cordset). In such situations, earth ground must be provided
via the mounting brackets.
EZ-SCREEN Low-Profile System with Integral Muting
www.bannerengineering.com - Tel: + 1 888 373 6767 45