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5.1.2 Connector Pin Allocation
The user connector is a 2 row 26-way latching header. Individual pin assignments are shown in Table 7.
Multiple supply grounds are provided and all supply and supply grounds (pins 1-6) are required to be
connected to the power supply in order to limit the current on any one pin. The three Supply Returns (pins
4, 5 & 6) are tied together at the connector as well as the three Supply pins (pins 1, 2 & 3.) Multiple signal
grounds are provided to reduce cross-talk. The signal grounds on pins 10,13, 20 & 23 are all tied together
at the connector and can be joined with any of the signal wires e.g. RS232, Network Available etc.
However each signal requires its own signal ground in order to limit current on any one pin.
Pin
Signal Name
direction
No.
(WRT 9601)
1
EXT_PWR
2
EXT_PWR
3
EXT_PWR
4
EXT_GND
5
EXT_GND
6
EXT_GND
7
ON/OFF
8
Reserved
9
Reserved
10
SIG_GND
11
DF_S_TX
12
DF_S_RX
13
SIG_GND
14
DF_ DCD
15
DF_ DSR
16
DF_ CTS
17
DF_RI
18
DF_ RTS
19
DF_ DTR
20
SIG_GND
21
Reserved
22
Reserved
23
SIG_GND
NETWORK_
24
AVAILABLE
25
Reserved
26
Reserved
Figure 9 provides a reference for the pin designation. Note that this designation is when looking into the
multi-interface connector from above. It is not to scale and not representative of the actual connector
mechanical layout.
Table 7: Multi Interface Connector Pin Allocation
Signal
Input
Input
Input
Input
On/Off control input
Data port, serial data into 9601 SBD
Input
Data port, serial data from 9601 SBD
Output
Output
Data port, Data Carrier Detect
Output
Data port, Data Set Ready
Output
Data port, Clear-to-Send
Output
Data port, Ring Indicator
Input
Data port, Request-to-Send
Input
Data port, Data Terminal Ready
Output
Set to logic 1 when network is visible
Signal function
Supply
Supply
Supply
Supply return
Supply return
Supply return
Signal ground
Transceiver
Transceiver
Signal ground
Signal ground
Signal ground
Signal level
+5 V +/- 0.5 V
+5 V +/- 0.5 V
+5 V +/- 0.5 V
0 V
0 V
0 V
On: 2.0V to Vsupply
Off: 0V to 0.5V
I = 120 A max
0V
RS-232
RS-232
0V
RS-232
RS-232
RS-232
RS-232
RS-232
RS-232
0V
0V
2.9 V CMOS
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