Carlson Merlin LT, User Manual

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Table 5 Standard RS232 protocols
6.1.3 Supplied ZDA cable pin-outs
Figure 24 and Table 6 below show the female 9-pin, D-type connector and pin-out schematic of the Merlin LT ZDA
cable.
Pin Data Description Direction
2 Transmit Output
3 Receive ZDA data received from external timing source into Merlin LT Input
5 Ground Common ground
Table 6 Pin assignment of the Merlin ZDA cable
Both the Merlin LT and the external timing source should be configured at 115,200 baud, 8 data bits, no parity, 1
stop bit with no flow control.
The voltage levels of the PPS signal input to the Merlin LT should ideally be 0 Vdc to 3.3 Vdc.
Important notes:
•
Understand the pin configuration of the external timing source being connected.
Pin Data Description
2 Receive
3 Transmit Outputting a ZDA from the external timing source to Merlin LT
5 Ground Common ground
Figure 23 Male 9-pin, D-type connector (standard RS232 protocol) and pin-out schematic
Figure 24 Female 9-pin, D-type connector of the Merlin ZDA cable and pin-out schematic