LTC 8561 |
Instruction Manual
|
Installation
EN
| 12
Bosch Security Systems | January 19, 2006
4.19 Connecting Biphase Signal Cable
The biphase signal cable is used to provide the
instructions to the receiver/driver. It is a common
signal to all devices, so no care must be taken to
identify its origin. Be sure to connect the plus and
minus phases correctly or the device will not work.
CAUTION: Do not install the signal cable
through the same conduit or glands used for
Class 1 input or output power. Use 18 AWG
shielded twisted pair which meets UL Style 2092
requirements (Belden 8760, or equivalent).
Locate connector J121, BIPHASE, and proceed with
the following steps.
1. Prepare the end of the signal cable, properly
identifying the plus and minus phases.
2. Connect the plus phase to the connector
terminal 1 labeled on the signal-in
terminal block.
3. Connect the minus phase to the connector
terminal 2 labeled SIGNAL - on the signal-in
terminal block.
4. Connect the shielding ground of the cable to
terminal 3 on the signal-in terminal block.
NOTE: There is no electrical connection made to the
receiver/driver of the signal shield. This should be
grounded at the signal source only. This connection is
provided as a matter of convenience only and can be
ignored if desired.
If the signal is to end here, confirm that the supplied
termination resistor is installed as prescribed below.
1. One end of the supplied 100 ohm resistor (or
equivalent resistance) to terminal 4 of the signal-
in terminal block.
2. The other end of the resistor to terminal 5 of
the same connector.
The signal may pass through this on-site
receiver/driver to another one in a hookup known as a
daisy chain. If this is the case, the termination resistor
is used only on the last on-site receiver and a signal
cable is hooked up as follows between the devices:
1. Connect one wire of the approved type signal
cable to terminal 4 of the signal-in terminal
block. Note that this color wire is the SIGNAL
+ for the next device.
2. Connect the other wire to terminal 5 of the
signal-in terminal block. Note that this color
wire is the SIGNAL – for the next device.
3. Connect the shields of each of the cables by
inserting them both into terminal 3 of the
terminal block.
Continue to install the next on-site receiver.
Remember to terminate the last device in the daisy
chain.
When the signals are properly connected and the unit
is powered, a green LED labeled RECEIVE will light
as code is received. This LED indicates receiving
activity and lights if code is received by this device
regardless of the destination address of the code.
4.20 Connecting the RS-232 Signal Cable
CAUTION:
Do not install the signal cable
through the same conduit or glands used for
Class 1 input or output power. Use cable
suitable for RS-232 type signals.
Locate connector J116, RS-232 Port, and proceed with
the following steps.
1.
Prepare the end of the signal cable properly
identifying the transmit and signal ground lines.
2.
Connect the transmit line to the connector
terminal 1, labeled RXD, on the terminal block.
3.
Connect the signal ground line to terminal 4 on
the signal-in terminal block. The shield of the
cable should be left unconnected at the
receiver/driver.
4.
If the signal is to run to another receiver/driver
#2, connect the RXD input of receiver/driver
#2 to the LOOP output, terminal 3 in the
terminal block of receiver/driver #1. Connect
terminal 4, GND, the signal ground of the two
receiver/drivers together. Connect the cable
shield at receiver/driver #1 to terminal 4, GND.
Do not connect the shield at receiver/driver #2.
The TXD terminal (terminal 2) is typically not used
and should remain unconnected unless otherwise
instructed to do so.
