X-Rite equips the 962 /964 and 939 chassis with a 10-circuit RJ-type female connector.
Pin #1 is leftmost with the unit upright.
Circuit #
Function
1
Generally Not Used (+5v @ 50 ma for barcode reader)
2
TXD (Transmit Data)
3
RXD (Receive Data)
4
DTR (Data Terminal Ready)
5
CTS (Clear to Send)
6
+12vun (Used if charged through I/O cable)
7
+12vun (Used if charged through I/O cable)
8
Charger Ground (Used if charged through I/O cable)
9
GND (Digital Ground)
10
NC (Not Used)
A minimum wiring for 'send only' communication (IBM) is as follows:
X-Rite (10c/RJ45)
IBM 9Pin (DB9p)
IBM 25Pin (DB25p)
2 X'mit data
2 Rec'd data
3 Rec'd data
9 Digi Ground
5 Digi ground
7 Digi ground
Many devices will require some kind of hardwire handshaking. All instruments provide a +8 volt signal on line 4 ( our DTR ) which can be connected to the receiver's hardwire handshake line ( usually CTS ). Our DTR is dropped during power-up and while taking measurements to inform the receiver that we are not ready to accept data. Similarly each unit can monitor its line 5 ( our CTS ) to see if the receiver is ready to accept data. Should you need the additional wiring a more complete schematic follows:
X-Rite (10c/RJ45)
IBM 9Pin (DB9p)
IBM 25Pin (DB25p)
2 X'mit data
2 Rec'd data
3 Rec'd data
4 DTR handshake
6 DSR
5 CTS
5 CTS/Busy handshake
7 RTS
20 DTR
9 Digi Ground
5 Digi ground
7 Digi ground
If two way communication is desired then one more wire may be added; i.e.:
X-Rite (10c/RJ45)
IBM 9Pin (DB9p)
IBM 25Pin (DB25p)
2 X'mit data
2 Rec'd data
3 Rec'd data
3 Rec'd data
3 X'mit data
2 X'mit data
4 DTR handshake
6 DSR
5 CTS
5 CTS/Busy handshake
7 RTS
20 DTR
9 Digi Ground
5 Digi ground
7 Digi ground
If Pin5 is turned off (instrument I/O configuration), the instrument will not monitor the handshake line from the computer / printer / etc. With most printers this will result in data overflow. With most computers this handshake is not required. For the Macintoshworld the following interface represents a full, bi-directional solution complete with two-way handshaking:
X-Rite (10c/RJ45)
Macintosh (8pin/DIN)
2 X'mit data
5 RxD- Receive data (minus)
3 Rec'd data
3 TxD- Transmit data (minus)
4 DTR Handshake Out
2 HSKi/Clock Handshake In
5 CTS Handshake In
1 HSKo Handshake Out
8 Charger Ground
8 RxD+ Receive data (plus)
9 Digi Ground
4 Digi ground
The above description is electrically equivalent to X-Rite's PN SE108-79 interface cable.
