Acromag, Inc. Phone: (248) 295-0880
•
Fax: (248) 624-9234
- 3 -
•
E-mail: [email protected]
•
On-Line: http://www.acromag.com
3
2
1
J4
2
J1
2
2
J2
RT
N
2
3
CO
M
D
D
R
T
T
R
NC
S1
D
D
D
D
T
3
2
1
3
1
3
1
3
1
24V
D
C
J4
1
8
6
7
J2
J1
5
3
4
2 1
J3
J2
J4 J3
2
J1
COM
D
D
COM
CO
M
3
2
R
T
R
COM
G
F1
Vcc
D
D
EOL
DISABLED
EOL
DISABLED
3
1
RS-485
SIDE B
24V
D
C
J3
TX
A - B
FAULT
B
R
S
-485
SI
D
E
B
1
TX
B - A
R
S
-485
SI
D
E
A
BAUD
RATE
G W
L2
G
FAULT
A
FUSE 3AG
0.5A, 250V
Status
LED's
Status
LED's
AC (HI)
1200 OHMS
HOT
POWER
220 OHMS
1200 OHMS
JUMPER PAIR
(ONE SIDE)
EOL
ENABLED
EOL Jumpers
Side B (OUT)
EOL
ENABLED
EOL Jumpers
Side A (IN)
GROUND
AC (LO)
RS-485
SIDE A
L1
L1
1 - 600 5 - 9600
2 - 1200 6 - 19.2K
3 - 2400 7 - 38.4K
4 - 4800 8 - 76.8K
FIGURE 2
EOL JUMPERS
EQUIVALENT CIRCUIT
(4683 UNITS ONLY)
NETWORK CONNECTIONS
4683-TTM-3F (24VAC)
4683-TTM-1F (115VAC)
4683-TTM-2F (230VAC)
REMOVE THIS SCREW ON EACH
SIDE TO REMOVE COVER
MODEL 4683-TTM-XF REPEATERS
End-of-Line (EOL) Termination Jumper Locations.
Input Power Fuse Location.
NOTE: 4683-TTM-3F UNITS ARE 24VAC POWERED
DIRECTLY AND DO NOT REQUIRE A SEPARATE
TRANSFORMER. THESE UNITS CAN SHARE THE
24VAC POWER BUS OR TRANSFORMER THAT IS
POWERING YOUR OTHER RS485 DEVICES.
Baud Rate
Switches
Rx
S1
Tx
R
T
D
CO
M
1
R
0
R
1
1
R
0
R
1
T
R
R
T
D
CO
M
R
T
D
CO
M
0
R
ST
1
R
0
R
ST
1
R
0
R
ST
2
1
5
4
3
7
6
8
24V
D
C
24V
D
C
1 2
4
3
5
7
6
8
24V
D
C
24V
D
C
DFT
DFT
DFT
POWER
R
T
D
RT
N
0
ST
RUN
RUN
ST
0
ST
RUN
RUN
ST
acromag
D
S1
NC
R
T
D
RT
N
1
RUN
0
RUN
ST
1
RUN
0
RUN
ST
1
RUN
BAUD
RATE
CO
M
DFT
Acromag
A-N3
DFT
Acromag
A-N5
BAUD
RATE
B-N1
Acromag
B-N3
DFT
Acromag
B-N5
DFT
Acromag
1 - 300 5 - 4800
2 - 600 6 - 9600
3 - 600 7 - 19.2K
4 - 2400 8 - 38.4K
AC
IN
PU
T
T
B
1
R
S
-232C
232 >
485
RS485
FAULT
TB
2
R
S
-485
FAULT
A
TX
B - A
R
S
-485
SI
D
E
B
FAULT
B
acromag
POWER
HOST PC
A-N1
RS-485
DFT
Acromag
A-N4
DFT
Acromag
UP TO 4000 FEET
SIGNAL REPEATER
RS-485
OUTPUT
(SIDE B)
Acromag
ANY RS-485 DEVICE
Acromag
B-N4
B-N32
485 >
232
120
A-N2
1 - 600 5 - 9600
2 - 1200 6 - 19.2K
3 - 2400 7 - 38.4K
4 - 4800 8 - 76.8K
R
S
-485
SI
D
E
A
TX
A - B
B-N2
ANY RS-485 DEVICE
MODEL 4SCC-TTM-1
MODEL 4SCC-TTM-2
MODEL 4683-TTM-XF
A-N32
INPUT
(SIDE A)
RS-485
RS-485
UP TO 4000 FEET
NETWORK SEGMENT 2
NO TERMINATION RESISTOR
UP TO 32
NODES PER
NETWORK
SEGMENT
NETWORK SEGMENT 1
RS-232
FIGURE 3
SIDE-B EOL TERMINATION
JUMPERS ENABLED
UP TO 32
NODES PER
NETWORK
SEGMENT
(EXTENDED NETWORK)
MODEL 4683-TTM-X REPEATER
STATION CONFIGURATION
RS232-TO-RS485 SIGNAL CONVERTER
SIDE-A EOL TERMINATION
JUMPERS ENABLED
120 OHM TERMINATION
RESISTOR REQUIRED
AT END OF NETWORK
OR LAST DEVICE ONLY
OPTIONALLY, YOU MAY CONNECT TERMINATION RESISTORS EXTERNALLY
BETWEEN THE RT TERMINALS ADJACENT TO THE NETWORK CONNECTIONS
FOR SIDE A AND SIDE B, BUT THE INTERNAL JUMPERS MUST BE SET TO
DISABLED WHEN USING EXTERNAL TERMINATION.
120 OHM TERMINATION
RESISTOR REQUIRED
THIS END
The station configuration drawing of Figure 3 is for general illustration purposes only. Johnson
Controls systems customers should instead refer to the Metasys® Network Technical Manual for N2
Bus Communication, or the MS/TP Communication Bus Technical Bulletin for wiring connections
using the 4683-TTM-xF repeater.
