Basic System
Section 2-1
9
Remote Interface and I/O Blocks are used in pairs, each of which provides
16 points. The I/O Block is easily connected to the Remote Terminal by way
of a connector. G72C Remote Terminals, on the other hand, do not require a
separate I/O Block. Remote Interface and I/O Blocks are paired as follows:
I/O
I/O Block
Remote Terminal
AC Input
G7TC-IA16 100/110 VAC or
G7TC-IA16 200/220 VAC
G71-IC16 12 VDC or G71-IC16
24 VDC
DC Input
G7TC-ID16 12 VDC
G7TC-ID16 24 VDC
G71-IC16 12 VDC
G71-IC16 24 VDC
Output
G7TC-OC16 12 VDC
G7TC-OC16 24 VDC
G71-OD16 12 VDC
G71-OD16 24 VDC
The number of Units in any one System is limited by the capacity of the PC.
Detailed limitations are provided in the following table. These totals include
all Optical and Wired Master Subsystems controlled by the PC.
PC
C120
C500, CV500,
CVM1-CPU01-EV2
C1000H, C2000H,
CV1000, CV2000,
CVM1-CPU11-EV2
/CPU21-EV2
Masters per PC
4
4
8
Slaves per Master
2
2
8 (see note)
Slaves per PC
8
8
16 (see note)
Remote Terminals
per Master
16
32
32
Words per Master
16 (256 points)
32 (512 points)
Always set the address number of the Remote I/O Unit in order starting from
#0. The CPU Unit will determine the number of Slaves connected according
to the address number of the Remote I/O Unit, as shown in the following
table, even if only one Slave is actually connected. Therefore, if the address
number is designated from the larger number, the actual total number of Re-
mote I/O Units that can be connected to one PC will be limited.
Largest Unit
No. Set
Number of Slaves Connected
(as Determined by the CPU
Unit)
0 or 1
2
2 or 3
4
4 or 5
6
6 or 7
8
If three Slaves connected to separate Masters mounted to the same CPU
Rack were set as Unit number 4, the PC would assume, as shown above,
that each Master had six Slaves attached, for a total of 18, or two more than
allowed in the System. An error would thus be generated, even if the three
Slaves were actually the only Slaves in the System.
Remote Terminals
Maximum Number of
Connectable Remote I/O
Units
Note
Example
