GE SymNet1, User Manual

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SymNet1
User Manual
12
Audio and alarm connections
To add alarm, audio, and RS-485 connections, wire the 20-way terminal block as shown in Figure 7 .
Figure 7. I/O Port pin numbering
The side of the SymNet1 is equipped with an accessories I/O Port (20-pin connector). Wire all I/O devices to
the 20-way terminal connector that was supplied with the unit. Connect the terminal connector to the I/O port.
Do not attempt to wire accessories directly to the I/O port. If the terminal connector is lost or missing, contact
GE Customer Service for a replacement.
Table 2 describes the 20-way terminal connector.
RS-485 solution wiring
To set up a two-wire bidirectional RS-485 connection to control a DVMRe or a KTD-405, do the following:
1. Connect a wire from pin 11 (TX+) to pin 13 (RX+) on the 20-pin terminal block.
2. Connect a wire from pin 12 (TX-) to pin 14 (RX-) on the 20-pin terminal block.
3. Connect a wire from the RS-485+ pin on the DVMRe or KTD-405 to pin 11 or 13 on the SymNet1
terminal block.
4. Connect a wire from the RS-485- pin on the DVMRe or KTD-405 to pin 12 or 14 on the SymNet1
terminal block.
Table 2. 20-way terminal connector
Pin number Description Pin number Description
Pin 1 Ground Pin 11 RS-422/485 TX+
Pin 2 Alarm in Pin 12 RS-422/485 TX-
Pin 3 Ground Pin 13 RS-422/485 RX+
Pin 4 Alarm out Pin 14 RS-422/485 RX-
Pin 5 Ground Pin 15 RS-232 TXD
Pin 6 Audio in Pin 16 RS-232 RXD
Pin 7 Ground Pin 17 RTS
Pin 8 Audio out Pin 18 CTS
Pin 9 Ground Pin 19 DCD
Pin 10 Ground PIn 20 RS-232 ground
1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20