Pinouts - 380/390 Series Chassis

X-Rite's 380/390 series densitometers are all equipped with RS232-C interfaces. Below are listed the pin assignments as seen from the side of the units. Pin #1 is the leftmost when the unit is upright. As seen from the side... pinouts of RS232 port are as follows:
Circuit #   Function   Description
1Spare OutputNot Used
2TXDTransmitted Data
3RXDReceived Data
4Spare InputNot Used
5CTSHandshake In (Clear to Send)
6V+UV+ 12V unregulated (from AC adaptor)
7V+UV+ 12V unregulated (from AC adaptor)
8PGDPower Ground
9DGDDigital (signal) Ground
10 NCNot Used

Pin #1 is leftmost when unit is sitting upright.


Those interested in making their own interface cables - read on!

The schematics below are useful when attaching the instrument directly to the computer. Each of the following varients uses only the 'A' lines of the instrument. A minimum wiring for 'send only' communication (IBM) is as follows:

X-Rite (10c/RJ45)   IBM 9Pin (DB9p)   IBM 25Pin (DB25p)
2 X'mit data2 Rec'd data3 Rec'd data
9 Digi Ground5 Digi ground7 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 data2 Rec'd data3 Rec'd data
4 DTR handshake6 DSR5 CTS
5 CTS/Busy handshake    7 RTS20 DTR
9 Digi Ground5 Digi ground7 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 data2 Rec'd data3 Rec'd data
3 Rec'd data3 X'mit data2 X'mit data
4 DTR handshake6 DSR5 CTS
5 CTS/Busy handshake    7 RTS20 DTR
9 Digi Ground5 Digi ground7 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 Macintosh world the following interface represents a full, bi-directional solution complete with two-way handshaking:
X-Rite (10c/RJ45)Macintosh (8pin/DIN)
2 X'mit data5 RxD-  Receive data (minus)
3 Rec'd data3 TxD-  Transmit data (minus)
4 DTR  Handshake Out    2 HSKi/Clock  Handshake In
5 CTS  Handshake In1 HSKo  Handshake Out
8 Charger Ground8 RxD+  Receive data (plus)
9 Digi Ground4 Digi ground

The above description is electrically equivalent to X-Rite's PN SE108-79 interface cable.

Questions? Need a Quote? Contact Us.  1.800.248.9748