7 Maintenance
7.2.1 Hot Swapping
7-6
7.2
Hot Swapping
7.2.1 Hot Swapping - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7-6
7.2.1
Hot Swapping
1) Meaning of Hot Swapping
a) Mounting or removing an I/O and other Modules while the external power supply is
being supplied ON to the Power Supply Module will allow the CPU Module to con-
tinue working normally. This function is called hot swapping (removal/insertion under
power).
b) Hot swapping allows replacement of I/O Modules without stopping the operation of
CPU Module.
c) If a Module is hot swapped, it will take several scan cycles for the new Module to run
normal I/O and communications processing as follows.
(1) I/O and Special Purpose Modules
Module will start normal I/O processing several scan cycles after being
mounted to the slot.
To use hot swapping effectively, remember that some Modules cannot be mounted or
removed while power is being supplied. Also be sure to consider the impact on the
overall control system before removing a Module.
2) Modules that Support Hot Swapping
The following table shows the Modules which support hot swapping.
This section describes precautions on mounting or removing 120-series I/O Modules
while the power is being supplied.
IMPORTANT
Table 7.2 Modules that Support Hot Swapping
Product
Name
Model No.
Permitted/
Not permitted
Safety Switch
Required
Digital
Input
Modules
100-VAC 16-point Input
Module
JAMSC-120DAI54300
Permitted
Yes
200-VAC 16-point Input
Module
JAMSC-120DAI74300
Permitted
Yes
12/24-VDC 16-point Input
Module
JAMSC-120DDI34300
Permitted
−
12/24-VDC 32-point Input
Module
JAMSC-120DDI35400
Permitted
−
12/24-VDC 64-point Input
Module
JAMSC-120DDI36400
Permitted
−
Analog
Input
Modules
Analog Input Modules
(
±
10V, 4 channels)
JAMSC-120AVI02000
Permitted
−
Analog Input Modules
(0-10 V, 4 channels)
JAMSC-120AVI02100
Permitted
−
Analog Input Modules
(4 to 20 mA, 4 channels)
JAMSC-120ACI02000
Permitted
−
