Photos show HE123-TX. The HE123TXI has an IDC20 shrouded header.
HE123-TXI external mount 16 channel RS422 differential pixel transmitter daughterboard
-connects to the top of HE123 via a 20 way IDC ribbon and uses up 16 of the expansion channels
-transmits to 4 HE123-RX 4 channel receivers via a standard cat5 or cat6 RJ45 (Ethernet) patch cable
-transmits via RS422 and allows a transmission distance of up to 250m
The HE123 series manual is available here
Supplied with 500mm of IDC20 ribbon cable and 2 IDC20 crimp connectors.
The HE123-TXI can be used with virtually any pixel controller to give 16 differential outputs.
Connection is made to the HE123 via plugging the HE123-PX2 via the supplied IDC20 cable onto the left or right hand side expansion connectors on the HE123 motherboard. The right expansion connector adds outputs 17-32. The left expansion header adds outputs 33-48.