User Manual

1.6 Comparison Table
7521 series 4521
Module Name Intelligent
Communication Controller
Addressable
RS-232 Converter
CPU AMD 80188, 20M Hz MC68HC705, 3.68M Hz (8-bit uP)
Number of RS-232 devices
able to handle
7521: 1 channel
7522: 2 channels
7523: 3 channels
7522A: 2 channel
7524: 4 channels
7527: 7 channels
1
D/I 7521: 3 channels
7522: 3 channels
7523: 2 channels
7522A: 5 channels
7524: 1 channels
7527: 1 channels
0
D/O 7521: 3 channels
7522: 1 channel
7522A: 5 channels
7524: 1 channels
7527: 1 channels
0
Built-in program Yes Yes
Program Download Yes No
Modify program Yes No
7-Seg LED 7521D, 7522D, 7523D
7522AD,7524D,7527D
No
I/O expansion bus 7521 & 7521D No
Support AsicKey 7521 & 7521D No
Isolation Site On RS-485 site On RS-232 site
Functions Flexible Limited
7521/2/2A/3/4/7 Series Hardware User’s Manual, Ver. 1.5 Sep/2002, 7Mh-001-15 -----39