TransCore 0596465PT15 Manuel D’Utilisation
Installing the Encompass 4H Reader
4-25
Note: When extending the Wiegand interface, use a three-pair cable such as Belden
2919. Use a twisted pair for the Red (Data1) with ground (Yellow of the Black and Yel-
low pair), and a twisted pair for Blue (Data0) with ground (Yellow of the Black and
Yellow pair). The third pair of the three-pair cable can be used for a spare in the event
either of the other two pair are damaged or fail. The cable shield should be tied to a
single-point Earth Ground on the controller end of the cable. Refer to
2919. Use a twisted pair for the Red (Data1) with ground (Yellow of the Black and Yel-
low pair), and a twisted pair for Blue (Data0) with ground (Yellow of the Black and
Yellow pair). The third pair of the three-pair cable can be used for a spare in the event
either of the other two pair are damaged or fail. The cable shield should be tied to a
single-point Earth Ground on the controller end of the cable. Refer to
.
Figure 4-15 Wiegand Cable Extension Diagram
Warning
Do not cut the RS–232 red/black wires. If you cut the wires, you may not be able to
use them in the future for testing or adding additional functions.
Do not cut the RS–232 red/black wires. If you cut the wires, you may not be able to
use them in the future for testing or adding additional functions.
Connecting Sense Input and Sense Output Circuits
The Encompass 4H Reader has two sense input circuits and three sense output circuits
available. The sense input circuits can be used to notify the Encompass 4H Reader of
external events and are designed to be connected to a free-of-voltage dry contact.
Sense output circuits are single-pole, double-throw relays that provide normally
closed (NC) and normally open (NO) dry contacts. The relay contacts are rated at
42.2V AC peak (30 Vrms) or 60V DC at 1 A maximum. If controlling an external gate
or device requiring high current, an isolation transformer is required.
available. The sense input circuits can be used to notify the Encompass 4H Reader of
external events and are designed to be connected to a free-of-voltage dry contact.
Sense output circuits are single-pole, double-throw relays that provide normally
closed (NC) and normally open (NO) dry contacts. The relay contacts are rated at
42.2V AC peak (30 Vrms) or 60V DC at 1 A maximum. If controlling an external gate
or device requiring high current, an isolation transformer is required.
The following sections provide information to connect the sense input and sense out-
put circuits.
put circuits.
Sense Input Circuits
The Encompass 4H Reader supports two sense inputs
–
sense input0 and sense
input1
–
which requires two sense input lines for each loop sense or a total of four
sense input connections. Sense input0 is the presence detection device line and is used
to control RF power. As shown in
to control RF power. As shown in
, sense input0 is through the red/green
wire pair on the I/O pigtail. The Encompass 4H Reader expects the sense input0 cir-
cuit to close when a vehicle is present (i.e., a NO condition). The minimum presence
true period is fixed at 0 ms, which indicates that no delay occurs in closing the circuit
when a vehicle is present.
cuit to close when a vehicle is present (i.e., a NO condition). The minimum presence
true period is fixed at 0 ms, which indicates that no delay occurs in closing the circuit
when a vehicle is present.