SmarTek Systems SAS-1 Installation at the Traffic Monitoring Site - Manual (Page 8)

SmarTek Systems (www.smarteksys.com) 8
circuit card for strain relief.
If a Type 170 compatible
SAS-CT is being used, tie
the home run to the top right
hole of the SAS-CT Carrier
Card for strain relief.
Connect power (8 to 24
VDC) to the SAS-1 by
means of a 2 position header
on the SAS-CT. Use 18 or
20 gauge stranded cable (red
and black color coded)
terminated on one end using
a pluggable terminal block
connector and connected on
the other end to the DC
power source in the cabinet.
Plug the connector onto the
header on the SAS-CT as
shown in Figure 6 for SAS-
CT Rev 1 or Figure 7 for
SAS-CT Rev 2. This step is
not necessary for the Type
170 compatible SAS-CT
since it takes power from the
edge connector in the card file.
Double check all connector positions and be sure the polarity of the power cable and
connector are correct. Insert the blade fuse in place on the SAS-CT.
If a Type 170 compatible SAS-CT is being used, slide it into the appropriate slot in the Type 170
Card File. Be sure it is seated properly.
Signals and information to and from the SAS-1
and the cabinet controller (or SAS-Relay
Interface) are passed over a serial RS-232 cable.
One end of the cable is plugged into the SAS-CT
via an RJ-45 connector (Figure 8). The other end
is plugged into a PC during SAS-1 setup or into
the cabinet controller (or SAS-Relay Interface)
for operation. The RS-232 signal pin out for the
SAS-CT RJ-45 plug is shown in Figure 8.
RxD (In) 1
NC 2
TxD (Out) 3
NC 4
Gnd 5
NC 6
NC 7
NC 8
1
8
Figure 8 SAS-CT RJ-45 Pinout
Figure 7
Connecting the
SAS Cabinet
Termination Rev 2.
1 - TxD+ (Blue)
2 - TxD- (Blk of Blue)
3 -
RxD+ (Green)
4 - RxD- (Blk of Grn)
5 - Gnd (Blk of Red)
6 -
PWR (Red)
7-- Gnd (Shield)
8 -
PWR (Red) Spare
9 - Gnd (Blk of Red) Spare
1
9
1
SAS Cabinet
Termination Rev 2
(SAS-CT Rev 2)
(8 - 24 VDC)
+
- -
9
RJ-45
To PC,
Modem,
Or
Relay
Card
RJ-45
To PC,
Modem,
Or
Relay
Card
Fuse
Green
Terminal
Block
Connector
1
Twisted Pair