Step 2: Installing The Module In The Base; Module Restrictions; Cpu Compatibility; Installing The Module In The Base - DirectLOGIC DL405 Manual

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Step 2: Installing the Module in the Base

Module
Restrictions

CPU Compatibility

Installing the
Module in the Base

I/O Points Used

WARNING: To minimize the risk of electrical shock, personal injury, or
equipment damage, always disconnect the system power before installing or
removing any system component.
There are a few restrictions that you need to consider if you are using this module.
The module must be installed in slot 0, which is adjacent to the CPU.
The module cannot be installed in an expansion or remote base. That is,
it must be installed in the CPU base.
If you're using a D4–440 CPU, you can have two interrupt modules.
They must be placed in slots 0 and 1.
If you're using a D4–440 CPU and a Timed Interrupt subroutine
(INTO17) then you cannot use the 8th interrupt point on the second
interrupt module. (The CPU always uses INTO17 as the Timed Interrupt
subroutine. If you're using the timed interrupt, disable the hardware
interrupt point by using the dipswitch on the rear of the module.)
If you have purchased your CPU unit from PLC Direct , your firmware will
automatically support the interrupt input module. This module may also work with
405 CPUs provided by previous vendors. However, if you have an older 405 CPU
with firmware prior to version 1.6, you will have to upgrade your firmware. Contact
PLC Direct for more information.
With the power disconnected, you are now
ready to install the module in the base. Here
are four steps for making the installation:
1. Notice the module has a plastic tab at the
bottom and a screw at the top.
2. With the module tilted slightly forward,
hook the plastic tab on the module into the
notch on the base.
3. Next, gently push the top of the module
back toward the base until it is firmly seated
into the base.
4. Now tighten the screw at the top of the
module to secure the module to the base.
Each Interrupt module consumes 16 input points. The first group of 8 points can be
used as the interrupt points. The second group of 8 points are used internally by the
interrupt module. If you do not use all of the first 8 points as interrupts, then you can
use them as normal discrete inputs. You cannot use the next 8 points for other
purposes. They are always reserved for the Interrupt module internal operation.
Interrupt
Input
CPU
Unit