ComStream CM601, Инструкция по установке и эксплуатации

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3-10 External Connections
RS-485 Applications
For RS-485 applications, the remote terminal is connected directly to the remote
control connector. Since the CM601 is defined as a DCE device, the control unit
must be configured as a DTE device. The RS-485 specification defines a
differential pair of signals that transitions from 0 to 5 V each. The 9-pin, RS-485
remote control connector pinout is shown in Table 3-11.
Status Relay Connector
The Status Relay connector on the M&C card provides:
Three connections to a Form-C relay for indicating CM601 current fault status
Three pairs of relay sense pins that can be connected to the status relays of
any other equipment. Sense signals can be monitored from the front panel or
remote terminal.
The status relay connector pinout is provided in Table 3-12.
Table 3-11 RS-485 Remote Connector Pinout for DCE
Pin Signal Name Direction*
1 Signal Ground Ground
3 Tr Input
5 R Output
7 Transmit – Input
9 Receive – Output
2, 4, 6, 8 Not connected Open
* For master-slave RS-485 bus connections, this pinout represents a slave when a
straight cable is used to connect the devices on the bus. Note the signal directions, with
transmit being an input and receive an output.
Table 3-12 Status Relay 9-Pin Connector Pinout
Pin Signal Name Description
1 Status Relay B Form-C normally open contact
2 Status Relay C Form-C Common contact
3 Relay Sense Pin 3 Relay sense signal
4 Relay Sense Pin 4 Relay sense signal
5 Relay Sense Pin 5 Relay sense signal
6 Status Relay A Form-C normally closed contact
7 Ground Relay sense signal return
8 Ground Relay sense signal return
9 Ground Relay sense signal return