KMD-5205 and KMD-5270 Installation and Operation
Revision J
13
SECTION 2
Installing the controllers
This section provides important guidelines for installing KMC direct
digital controllers. Review this information carefully for proper
installation.
Mounting
Mount the controller inside of a metal enclosure. KMC Controls recommends
using a UL-approved Enclosed Energy Management Equipment Panel such as a
KMC model HCO-1034, HCO-1035 or HCO-1036. Insert #6 hardware through the
two mounting holes on each side of the controller to securely fasten it to a flat
surface. See
for mounting hole locations and dimensions. To
maintain RF emission specifications, use either shielded connecting cables or
enclose all cables in conduit.
Connecting inputs
The controllers include eight universal inputs. Each input can be configured with
software to receive either analog or digital signals. By using the optional pull-up
resistors, either passive or active devices may be connected to the inputs. For
additional information, see the application note AN0504L,
Connecting inputs and
outputs to KMC controllers
.
Pull-up resistors
For passive input signals, such as thermistors or switch contacts, use a pull-up
resistor. For KMC thermistors and most other applications place the moveable
jumper in the
10K
position.
4–20 mA inputs
To use a 4–20 current loop input, connect a 250 ohm resistor from an input to
ground. The resistor will convert the current input to a voltage which can be read
by the controller analog-to-digital converter. Place the moveable pull-up jumper
in the
NONE
position.
Pulse inputs
Connect pulse inputs under the following conditions:
◆
If the pulse input is a passive input such as switch contacts, then place the
input pull-up jumper to the
10K
position.
◆
If the pulse is an active voltage (up to a maximum of +5 volts DC), then place
the input pull-up jumper in the
NONE
position.
