User manual
2638A 
Users Manual 
3-8 
Table 3-2. Channel Types and Numbers 
Channel Type 
Channel Numbers 
and Range 
Reference 
Input Channel (front panel)  Ch001 
See “Analog Channel Configuration (Ch001, 
Ch102 to Ch322)” on page 3-16. Channels 
201 to Ch222 and Ch301 to Ch322 are not 
available on 2638A/05. 
Input Channel (rear panel, slot 1)  Ch101 to Ch122 
Input Channel (rear panel, slot 2)  Ch201 to Ch222 
Input Channel (rear panel, slot 3)  Ch301 to Ch322 
Digital I/O Channel  Ch401 
See “Digital I/O Channel Configuration 
(Ch401)” on page 3-23. 
Totalizer Channel  Ch402 
See “Totalizer Channel Configuration 
(Ch402)” on page 3-24. 
Math Channel  Ch501 to Ch520 
See “Math Channel Configuration (Ch501 to 
Ch520)” on page 3-25. 










