Red Lion LEGEND - Manual (Page 43)

AC POWER WIRING
The AC power is connected to the bottom left terminals 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 will be in the 230 VAC position when shipped from the factory.
Note: Before applying power to the unit make sure the AC 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 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 has nonvolatile memory and information is stored on power down (Refer
to block diagram).
SERIAL COMMUNICATIONS
Refer to the RS485 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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