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Up to 100 Area Stations
Up to 1024 Data Entry Units
Up to 32 Data Entry Units per 2791 Model 1 or 2793 Area Station
Up to three 1035 Badge Readers per 2791 Model 1 Area Station
One 1053 Printer per 2791 Model 1 or 2793 Area Station
| Up to 35 Area Stations per segment
Up to 1000 wire feet of two-wire communications line between Data Entry Units and Area Stations (N o. 22 A W G Twisted Pair) or 4500 feet using RG1 30/21 Coaxial Cable
Up to 1000 wire feet between Area Stations or between 2715 and Area Stations (N o. 22AW G Twisted Pair) or 4500 feet using R G 130/21 Coaxial Cable
| See the Installation Physical Planning Manual G A 27-3017-1 or later version for distances with other wire sizes.
•
Figure 2.
IBM 2790 Configuration
lished by a two-wire communications line which may also
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be up to 4500 feet. No locally supplied power is required
at the 2795 and 2796 Data Entry Units.
The IBM 2790 Data Communication System supplies
the latest information to the data processing center, thus
diminishing the time gap between the organization of data
and its availability for use.
Some of the applications of the 2790 system are:
Product Control
Material Control
Labor Control
Tool Control
Quality Control
Attendance Recording
The advantages of the 2790 system over previous data
collection systems are:
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1. The 2790 system is capable of high-speed data
transmission (approximately 900 characters per
second partitioned among the active terminals
on the loop).
2. Guidance lights on the 2791 Area Station inform
the operator of the next operation the system
controller expects.
3. The 2790 system has the ability to control a large
number of devices (up to 100 area stations, 1024 data
entry units, 100 IBM 1053 Printers, and 300 IBM 1035
Badge Readers).
4. The DEU's are inexpensive, can be attached to the
AS by a two-wire communications line, and require
no locally supplied power.
T Y P IC A L A P P L IC A T IO N S
The following discussion illustrates a 2790 system perform
ing typical applications in a manufacturing plant.
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