Casella CEL CEL-296 - Manual (Page 55)

Table 1 Connector lines used in top connector for interface
Line Direction Function Description
2 -- Serial ground 0 V
9 Output Request to send Line is set low by sound level
meter when data is available
for output, data is valid ONLY
while this line is low
10 Output Serial data Serial data output from sound
level meter
12 Input Clear to send Line must be set low by filter
set to enable output from
sound level meter.
Table 2 Connector lines used in bottom connector for interface
Line Direction Function Description
2 -- Serial ground 0 V
3 Input Filter step Taken to +5 V for minimum of
25 ms then opened
6 Input All stop reset Closed to line 2 for minimum of
25 ms then reopened
9 Output Request to send Line is set low by filter set
when data is available for out
put, data is valid ONLY while
this line is low
10 Output Serial data Serial data output from filter
set
11 Input Clear to send Line must be set low by
receiving device to enable
output from filter set
CEL Instruments Ltd CEL-296/3 Operator Handbook Page 55