External Device Monitoring Hookup
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 Diagram—8-pin Receiver and IM-
on page 48). Pin 3 of the receiver connector provides connection for the external device monitoring
input.
External device monitoring (EDM) must be wired in one of two configurations described below.
One-Channel Monitoring: This is a series connection of normally closed monitor contacts that are force-guided
(mechanically linked) from each device controlled by the EZ-SCREEN LS Basic. The monitor contacts must be closed
before the EZ-SCREEN LS Basic OSSDs can turn On. After 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 Diagram—8-pin Receiver and IM-T-9A Interface Module
on page 48 for wiring. Connect the
monitor contacts b24 V dc and EDM (pin 3).
No Monitoring: Use this configuration to perform the initial checkout; see
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 EZ-SCREEN LS Basic for no monitoring, connect EDM (Pin 3) to +24 V dc.
WARNING: Retrofit of 2-channel EDM Installations.
In existing installations using 2-channel external device monitoring (default setting of EZ-SCREEN and
EZ-SCREEN LP systems), the parallel wiring of the N.C. monitoring contacts must be rewired for the
series connection used for 1-channel EDM. If the required wiring changes are not made, the device
connected to pin 2 (Orn/Blk) will not be monitored and could result in undetected faults and create an
unsafe condition, which could result in serious bodily injury or death.
If there are any questions concerning retrofit installations, contact Banner Engineering.
6.4.5 Fault Output
The current sourcing (PNP) solid-state output (70 mA maximum) is used for control functions that are not safety related; a
typical use is to signal a lockout (fault) to a programmable logic controller (PLC). Available on both the receiver and emitter,
the output provides a fault signal (lockout = On). Interrupting (blocking) the sensing field is not considered a lockout, so the
Fault Output does not change state.
This feature is available only with 8-conductor models.
6.4.6 Scan Code Select
The 8-pin emitter and receiver may be configured to one of two Scan Codes (1 or 2). A receiver recognizes light only from
an emitter with the same scan code. The scan code is configured at power-up and remains set until the input is changed
and power is cycled.
• Select Scan Code 1 by connecting pin 8 (violet wire) to 0 V dc or leaving it open (not connected). Prevent unused
wires from shorting to ground or to other sources of energy (for example, terminate with wire-nut).
• Select Scan Code 2 by connecting pin 8 (violet wire) to +24 V dc.
Both the emitter and its corresponding receiver must have the same setting. Standard 5-pin emitter or receiver models are
always configured for Scan Code 1.
6.4.7 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 LS Basic is ready for testing in combination with the guarded machine.
The operation of the EZ-SCREEN LS Basic 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.
6.4.8 Sensor Interchangeability
The figures and table below illustrate a wiring option that provides sensor interchangeability (or swapability)—the ability to
install either sensor at either QD connection.
The resulting installation provides the ability to swap the emitter and receiver position. This wiring option provides
advantages during installation, wiring, and troubleshooting.
EZ-SCREEN
®
LS Basic Safety Light Screen
42
www.bannerengineering.com - Tel: 763.544.3164
