WIRING CONNECTIONS
After the unit has been mechanically mounted, it is ready to be wired. 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 be protected
by a fuse or circuit breaker. All wiring connections are made on removable
plug-in terminal blocks. There is a separate terminal block for the bottom board
(TBA)
and optional top board
(TBB)
. When wiring the unit, remove the terminal
block and use the numbers on the label to identify the position number with the
proper function. Strip the wire, leaving approx. 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 tightly. Each terminal can accept up to
one 14-gage, two 18-gage or four 20-gage wire
(s)
. After the terminal block is
wired, install it into proper location on the PC board. Wire each terminal block in
this manner.
POWER WIRING
Primary AC power is connected to terminal 1 and 2
(marked VAC 50/60 Hz,
located on the left hand side of the bottom terminal block)
. To reduce the chance of
noise spikes entering the AC line and affecting the indicator, the AC power should
be relatively
“clean”
and within the specified 10% variation limit. Drawing power
from heavily loaded circuits or circuits which also power loads that cycle on and
off,
(contactors, relays, motors, machinery, etc.)
should be avoided.
USER INPUT WIRING
User inputs (PGM.DIS., E1-CON, and optional E2-CON) are digital inputs
that are active when connected to TBA #5 Common. Any form of mechanical
switch, sinking collector logic with less than 0.7 V saturation may be used. The
use of shielded cable is recommended. Follow the EMC Installation Guidelines
for shield connection.
-38-
Basic Connection
Connection w/3-Wire Sensor