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Section 3
3.2
INPUT/OUTPUT WIRING
The following tables and illustrations describe both the 1020N and 1020DN input/output signals. Con-
sult the Installation Drawings in Appendix A for details regarding I/O and transducer connections for
your specific model.
3.2.1 1020N INPUT/OUTPUT WIRING (TB1 and TB2)
J1 (DB9)
PIN#
SIGNAL
1
NU
2
Rs232 Rx
3
Rs232 Tx
4
Rs232 DTR
5
Ground
6
NU
7
Rs232 RTS
8
Rs232 CTS
9
NU
PIN#
SIGNAL
1
N/C
2
N/C
3
Isolo1 Ret
4
lsoIo1
5
+5 VDC
6
Ground
7
DigOut1 Ret
8
DigOut1
9
IsoPgen Ret
10
IsoPgen
PIN#
SIGNAL
1
GROUND
2
Digln1
3
Digln1 Ret
4
Digln2
5
Digln2 Ret
6
RS232 Rx
7
RS232 Tx
8
Ground
9
RS232 RTS
10
RS232 CTS
1020N INPUT/OUTPUT WIRING (TB1)
FUNCTION
NOT DEFINED
NOT DEFINED
ISOLATED LOOP RETURN
ISOLATED LOOP SUPPLY
For CC Supplied Access. Only
Ground
STATUS BIT RETURN
STATUS OUTPUT
STATUS BIT RETURN
STATUS OUTPUT
1020N INPUT/OUTPUT WIRING (TB2)
FUNCTION
GROUND
Digital Input CH 1
Digital Input Return Ch 1
Digital Input Ch 2
Digital Input Return Ch 2
RS-232 Receive
RS-232 Transmit
Ground
RS-232 Request to Send
RS-232 Clear to Send
J1
I/O Terminals TB1 and TB2
TB2
DESCRIPTION
Reserved for future implementation.
Spannable 4-20 mA output proportional to any available data
variable assigned under menu control. See drawing 1020-7
Schematic A (Loop Powered).
Up to 250 mA +5 Volts Source
Ground
Status output responds to any available alarm function
assigned under menu control (see 1020N-7 Schematic C).
Pgen Source. Synthesized digital pulse proportional to flow
(see 1020-7 Schematic C).
DESCRIPTION
GROUND
NoTotCh1 Input (see 1020-7 Schematic D).
NoTotCh1 Return (see 1020-7 Schematic D).
ClrTot Input (see 1020-7 Schematic D).
ClrTot Return (see 1020-7 Schematic D).
Std RS-232 Signals & Port Receive Data from outside source
Std RS-232 Signals & Port Transmit Data to outside destination
Standard RS-232 Signals and Port
Standard RS-232 Signals and Port
Standard RS-232 Signals and Port
3-2
1020NFM-1D
MENU LOCKOUT SWITCH S1
TB1
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