Simoco EMEA Ltd SDB670AC01 Manual De Usuario
SDB670 – SERVICE MANUAL
TNM-M-E-0032
May 13
Page 28
DESCRIPTION
4.3.8
Facilities Connector
The 25-way D Type facilities connector can be programmed for any combination of digital inputs
and outputs.
and outputs.
The connector pin-outs for the 25-way D Type Facilities Connector are shown below in Table 14.
Table 14. Facilities Connector Pin-outs
Pin
Function
Pin
Function
1
Digital Input
14 Digital Output
2
Digital Input
15 Digital Output
3
Digital Input
16 Digital Output
4
Digital Input
17 Digital Output
5
Digital Input
18 Digital Output
6
Digital Input
19 Digital Output
7
Digital Input
20 Digital Output
8
Digital Input
21 Digital Output
9
GPS Rx +
22 GPS Rx -
10
GPS Tx +
23 GPS Tx -
11
1PPS Rx +
24 1PPS Rx -
12
Digital to Analogue Convertor (DAC)
Output
Output
25
0 V
13
Supply Voltage
The maximum current provided by the supply voltage pin is 1 A, which is protected by a self
resetting fuse.
resetting fuse.
Digital Outputs are open collector able to sink 300 mA each; the total for all outputs must not
exceed 600 mA. See Figure 8 overleaf.
exceed 600 mA. See Figure 8 overleaf.
Digital inputs are active low. Digital high voltages should not exceed 20 V. See Figure 8.
GPS Rx and 1PPS Rx are Differential RS422.
The “Analogue Out” signal is between 0 V and 5 V and software controlled to indicate various
functions e.g. RSSI.
functions e.g. RSSI.