A&D Weighing AD-4407 - Manual (Page 61)

AD-4407 Weighing Indicator Page 59
17. 17. 17. 17. Current Loop Output (OP Current Loop Output (OP Current Loop Output (OP Current Loop Output (OP- - - -08) 08) 08) 08)
Replacing the RS-232C interface with this option, current loop output, 3-relay outputs
and 1-control input can be used with the RS-232C interface of this option.
RS-232C functions are the same as the RS-232C interface described in “13. RS-232C
Interface”.
The solid state relays output the result of comparison.
The control input can control the indicator from an external terminal just like the front
panel key operations.
Set the external control function at F15 of the F-Functions.
When connecting the function pin and the common pin, the indicator makes the action.
Keep a signal width of more than 100ms for the On-time and Off-time.
ON(Make)
OFF(Break)
Pin connections and Circuits Pin connections and Circuits Pin connections and Circuits Pin connections and Circuits
Function Pin No. Signal name Direction Description
1 TXD Output Transmit data
2 RXD Input Received data
3 DSR Output Data set ready
RS-232C
4 SG - Signal ground
5 HI Output Relay output HI
6 OK Output Relay output OK
7 LO Output Relay output LO
Relay
output
8 COM(out) - Relay output common
9 CL1 Output Current loop output 1 Current
loop 10 CL2 Output Current loop output 2
11 EXT3 Input Control input 3 (F15) Control
input 12 COM(in) - Control input common
FG 13 FG - Frame ground (case)
17. Current Loop Output (OP-08)
Current loop
output
'
'
6:& 4:& &54 5) *+ 1- .1 %1/Q %.
Relay output RS-232C
Ʈ
%. ':6 %1/K ()
Control
input
Case
K
Current
loop
Relay specifications
Maximum voltage
DC50V
Maximum current
DC100mA
Maximum resistance
8 9
More than 100ms More than 100ms