Installation
2.6 Signal Connections
The majority of signal connectors are located on the rear panel of the SBM75e Modulator,
except for one monitor and control connector located on the front panel.
Note
Always use the specified cables supplied for signal integrity and compliance with EMC requirements
(see appendix A, Technical Specification).
2.6.1 M&C Connector - RS232
A 9-pin D RS-232 connector is located at the top, right of centre, rear panel of the modulator
and is provided to support the connection of ANSII 3.64 VT-100 terminals.
Table 2.4: M&C Connector RS232
Item Specification
Connector type: 9-way, D-type, Female
Connector designation: M&C RS232
Standard: RS232
Configuration: DCE
Pin-outs: 1 Not Used 6 Not Used
2 Tx Data 7 Not Used
3 Rx Data 8 Not Used
4 Not Used 9 +5 VDC @ 100 mA
5 Ground
5
1
6
9
2.6.2 M&C Connector – RS485
A 9-pin D Dual function RS-485 connector is provided immediately under the RS-232 Monitor and
Control connector on the rear panel. This port is configured for 4-wire operation and may be
controlled by different protocols, packet protocol mode or BUC control.
Using the RS-485 port with the command or packet protocol allows a number of modulators to
be controlled from a client PC. Each modulator being controlled on the same bus must have a
unique address.
Table 2.5: M&C Connector – RS485
SBD75e Series Modulator Installation and Operation Manual
2-9
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