Red Lion LEGEND - Manual (Page 54)

Line Filters for input power cables:
Schaffner # FN610-1/07 (RLC #LFIL0000)
Schaffner # FN670-1.8/07
Corcom #1VB3
Corcom #1VR3
Note: Reference manufacturer’s instructions when installing a line filter.
5. Long cable runs are more susceptible to EMI pickup than short cable runs.
Therefore, keep cable runs as short as possible.
6. Switching of inductive loads produces high EMI. Use of snubbers across
inductive loads suppresses EMI.
Snubbers: RLC #SNUB0000
WIRING CONNECTIONS
The bottom board has a removable terminal block (TBA) on the left where the
power connections are made. The plug-in relay board also has a removable
terminal block and is located at the bottom right of the unit. The top board has a
removable terminal block (TBC) where the signal inputs, User Inputs, solid state
outputs, and serial communications connections are made. When wiring the unit,
remove the terminal block and use the numbers on the top label to identify the
position number with the proper function. All conductors should meet voltage
and current ratings for each terminal. Also cabling should conform to appropriate
standards of good installation, local codes and regulations. It is recommended
that power supplied to the unit (AC or DC) be protected by a fuse or circuit
breaker. Strip the wire, leaving approximately ¼" bare wire exposed (stranded
wires should be tinned with solder). Insert the wire into the terminal and tighten
down the screw until the wire is clamped in tightly. Each terminal can accept up
to two 18-gage wires. After the terminal block is wired, install it in the proper
location at the rear of the unit. Wire each terminal block in this manner.
A.C. POWER WIRING
The AC power is connected to the bottom left terminals TBA 1 & 2 marked AC
PWR. The voltage selector switch, located at the side of the unit, is used to select
the proper voltage. The switch is a slide movement type and can be set by using a
small screwdriver. If the switch is toward the front of the unit, it is set for 115
VAC input. If the switch is towards the rear of the unit, it is set for 230 VAC
input. The switch is in the 230 VAC position when shipped from the factory.
Note: Before applying power to the unit make sure the A.C. power switch is set
for the proper voltage setting.
To reduce the chance of noise spikes entering the AC line and affecting the unit,
the AC power should be relatively “clean” and within the specified ±10% variation
limit. Connecting power from heavily loaded circuits or circuits that also power
loads that cycle on and off, (contactors, relays, motors, etc.) should be avoided.
DC POWER WIRING
The DC power is connected to the bottom left terminals TBA 3 & 4 marked +12
VDC and common. The DC power source must be capable of supplying the unit’s
rated current (250 mA) and be within the specified
±20% variation limit. It is not
necessary to provide battery backup to retain programmable information.
The Legend Plus has non-volatile memory and information is stored on power
down (Refer to block diagram).
SERIAL COMMUNICATIONS
Refer to the Serial Communications section of the manual, for wiring and
operational procedures.
USER INPUT WIRING
Programmable external user inputs are digital inputs that are active when
connected to TBC #3 Common. The use of shielded cable is recommended. Follow
the Additional EMC Installation Guidelines for shield connection.
OUTPUT WIRING
RELAY CONNECTIONS
To prolong contact life and suppress electrical noise interference due to the
switching of inductive loads, it is good installation practice to install a snubber
across the contactor. Follow the manufacturer’s instructions for installation.
Note: Snubber leakage current can cause some electro-mechanical devices to be
held ON.
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