Specifications

112 Rockwell Automation Publication 1769-TD006E-EN-P - January 2015
1769 Compact I/O Modules Specifications
1769-ASCII
Compact ASCII module
Table 103 - Technical Specifications - 1769-ASCII
Attribute 1769-ASCII
Inputs 2 full duplex (RS-232, RS-422)
2 half duplex (RS-485)
Serial input voltage signal 3…25V DC with respect to signal ground (SG) 0, Asserted, ON, Space, Active
-3…-25V DC with respect to signal ground (SG) 1, Disasserted, OFF, Mark, Inactive
Current draw @ 5.1V 425 mA
Current draw @ 24V 0 mA
Power dissipation, max 2.13 W
Thermal dissipation, max 7.3 BTU/hr
Isolation voltage 30V
Tested to withstand 710V DC for 60 s
Transmit transaction ID 0…255
Handshaking RTS/CTS hardware handshaking always enabled
Weight, approx 0.18 kg (0.40 lb)
NC1
RXD2
TXD3
NC4
COM5
NC6
RTS7
CTS8
NC9
DCD
TXD
RSD
DSR
COM
DTR
CTS
RTS
GND
8
2
3
6
7
20
5
4
1
1
3
2
6
5
4
8
7
ASCII DTE DTE 9-pin 25-pin
TXD-
NC
NC
1
2
3
4
COM5
RXD+
RTS
CTS
6
7
8
TXD+9
RXD-
TXD-
COM
TXD+
RXD+
RXD-
ASCII
NC
NC
NC
1
RXD2
TXD3
4
COM5
6
RTS7
CTS8
N.C.9
CD
TXD
RXD
DSR
COM
DTR
CTS
RTS
RI
8
2
3
6
7
20
5
4
22
1
3
2
6
5
4
8
7
9
GND 1
ASCII DTE DTE 9-pin 25-pin
TRXD-
NC
NC
NC
NC
1
2
3
4
COM
RTS
CTS
5
6
7
8
TRXD+9
TRXD-
COM
TRXD+
ASCII
RS-232 Wiring Module to DTE Device (hardware handshaking disabled)
RS-232 Wiring - Module to Printer (hardware handshaking enabled, standard printer
adapter cable)
RS-422 Wiring
RS-485 Wiring