Red Lion LEGEND - Manual (Page 40)

A.C. 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 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 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 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.
SIGNAL WIRING
INPUTS A & B
Input A and Input B have the same input circuitry. Input A and Input B each
have separate DIP switches for setting the type of signal input. A Magnetic
Pickup or Logic Input signal can be sent to either input. When a MAGNETIC
PICKUP is used the Sink/Source DIP switch for the appropriate input, must
be in the “SRC” position or the unit will not count. The HI/LO FRQ DIP
switch will effect the maximum input frequency at that input.
The Input schematic shows the details of Input A and Input B circuitry and
share the same common. Each input has three DIP switches associated with its
input. The functions of these switches are as follows:
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