IMS IMSAI 8080 User Manual page 312

CURRENT LOOP CONNECTIONS
WITH CURRENT SOURCE
WITHOUT CURRENT SOURCE
SIO BOARD
— I
23
Transmit
1
2S
^ »
► __1
* • T 21
1 i
Receive
f ! 24
■ > 5 —
- . 4
■M N
Loop -OUT
H N
-OUT
Loop
SIO 2
USER'S GUIDE
REVISION 1