KTD-405/405A/405-2D Keypad
Quick Guide
14
Input/output box connections
Terminal strips
Earth ground. To ground.
RS-485 A/B. To and from a DVR or
additional keypad. Observe polarity.
(Optional, use if you do not use the RJ45
connection.) You can use both the wire
terminals and the RJ45 connection for
RS-485.
RS-422 IN A/B. In from an upstream
Digiplex device such as an RS-422
keypad, alarm chassis. ASCII converter,
or time/date generator. Observe
polarity.
RS-422 OUT A/B. Out to downstream
matrix switchers and PTZ cameras; can
also connect to Digiplex controllers or
ASCII converters. Observe polarity.
Speaker shield, speaker. To speaker, if
used (KTD-405A only).
Power cable
For safety, use a tie-wrap to secure the
power cable to the tie-in.
Bias switch
Use to load the RS-485 line appropriately.
Slide the switch up for the ON position.
CAUTION: Unless the system
includes a bridge connection
using fiber or Ethernet, turn on
the bias switch for only one
keypad per system.
CAUTION: Earth ground. For surge
protection you can connect to
ground at every I/O box.
RS-485 shield. Ground at only
one end of each continuous
segment of shield.
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