Connections - GE D400 Hardware User Manual

RS-485 CONNECTIONS
To connect RS-232
type devices to the
RS-232 adapter
RS-485 connections
54
The required RS-232 cable is a serial null modem, DB-9F to DB-9M cable. The cables must
be shielded and DB-9S connector covers must provide EMC shielding (e.g. metallized
plastic or die-cast metal covers).
See "RS-232 adapter" on page 33 for configuration options.
Use the cable connection shown in Figure 30
Figure 30: RS-232 cable connection
6
7
8
9
Table 10: RS-232 Port DB-9 Connector Signal Definitions
Pin DTE (default)
Numbers
Signal Acronym
1 DCD
2 RXD
3 TXD
4 DTR
5 Signal GND
6 DSR
7 RTS
8 CTS
9 Not connected
a
DCD output not supported in DCE mode.
The D400 accepts connections to RS-485 2-wire and 4-wire type devices through the RS-
485 Adapter. The RS-485 Adapter (GE Item No. 520-0208LF) plugs into any serial
communication slot (slots 1 through 8) on the D400. It contains two independently isolated
RS-485 channels on a single terminal block: Channel 1 on terminals TB1-1 through TB1-5
and Channel 2 on terminals TB1-6 through TB1-10. Terminal blocks accept a range of 24-
14 AWG [0.2-2.1 mm²] Recommended wire strip length is 0.2" [5.0 mm]. Screws shall be
torqued with tool setting of 4.2 in-lb [0.46 Nm]. A 3.0 to 3.5 mm flat screwdriver tip is
recommended.
The transceiver in 2-wire mode and the receiver in 4-wire mode present 1 unit load (UL),
nominally 12 KOhm, to the external network with switches SW3/SW4 all off.
See "RS-485 adapter" on page 37 for configuration options.
CHAPTER 4: CONNECTING TO DEVICES AND NETWORKS
1 1
2 2
3 3
5 5
5 5
DCE
Signal Flow Signal Acronym
IN from DCE a
IN from DCE RXD
OUT to DCE TXD
OUT to DCE DTR
- Signal GND
IN from DCE DSR
OUT to DCE RTS
IN from DCE CTS
- Not connected
GENERAL D400 SUBSTATION GATEWAY USER'S MANUAL
6
7
8
Relay
9
Signal Flow
a
OUT to DTE
IN from DTE
IN from DTE
-
OUT to DTE
IN from DTE
OUT to DTE
-