Johnson Systems EDI-120 Control Retrofit User Manual
Page 6
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• Disconnect the P1 power connector/cable. Carefully squeeze the
latches on each side of the connector together to release the connector
and then pull the connector out. Inspect the connector and the
termination of the wires in the connector. Be sure everything looks okay.
• Disconnect the P2 connector/cable. This cable will not be re-used on the
EDI-120 retrofit, so once the old control module is removed, it should
be coiled up, wire-tied and carefully set aside inside the dimmer rack,
making sure it is isolated from any AC line voltage.
• Disconnect the P3, P4, P5 and P6 connectors/cables. Again, be sure
not to pull directly on the ribbon cable to remove the connector as this
may cause damage. Carefully pull the connectors straight out.
• The old control module should now be free and clear of all connections,
and can now be completely pulled out of the dimmer rack and set aside.
• With the old control module removed, it is a great opportunity to do
some preventative maintenance. The dimmer rack should be thoroughly
cleaned, vacuumed and sprayed out using compressed air. All of the
AC line and load connections should be inspected and tightened if
necessary.
• Inspect the fan blower and be sure it spins freely. If required,
replacement fans are available.
Installation of the new EDI-120 Retrofit Control System
• Remove your new EDI-120 retrofit control system from the box.
• Take a look at the field wiring connections on the back of the EDI-120
retrofit. There is a connector for DMX-A input, a connector for DMX-A
thru, a connector for DMX-B input, a connector for DMX-B thru, a
connector for four (4) 0-10VDC analog inputs, a connector for dry
contact inputs and a connector for +12VDC to power peripheral devices.
All of the field wiring terminates on these connectors.
• Refer to the “Control Input/Output Connections” section on page 11 and
12 for details.
• On the old EDI control module (Multi-Link), the DMX input came through
the P2 connector. Since this connection/cable is now obsolete, locate
the DMX input and thru (if applicable) cable(s) coming into the dimmer
rack from the field. Once the cable(s) has been located, disconnect
it. Inspect the cable(s) and ensure it will be long enough to reach the
connectors on the EDI-120 retrofit, once it is installed. Two (2) 3-position
breakaway connectors and a 10’ (3m) Belden 9829 (or equivalent)
length of cable is supplied for extending the cable(s) if it isn’t long
enough. The cable(s) can now be dressed out and terminated on the
DMX-A input and DMX-A thru (if applicable) breakaway connectors
provided. Be sure to isolate and protect all shield wires and comply with
standard RS-485 termination practices.
• On the old EDI control module, the 0-10VDC analog inputs came
through the P2 connector. Since this connection/cable is now obsolete,
locate the analog input cable(s) coming into the dimmer rack from
the field. Note the EDI-120 retrofit only has four (4) 0-10VDC analog
inputs, versus ten (10) on the old control module. Once the analog input
cable(s) have been located, disconnect them. If required, extend the
cables. The cable(s) can now be dressed out and terminated on the
analog input breakaway connector provided.