Download Acromag Model 4683-TTM-x AC-Powered RS

INSTRUCTIONS: Model 4683-TTM-x
AC-Powered RS-485 Network Repeaters

These instructions are presented in abbreviated form. Please
visit our web site at www.acromag.com to register and obtain
the complete User Manual 8500-237 for this product.
MODEL DESCRIPTION
Model
4683-TTM-1
4683-TTM-2
Power
115V AC
230V AC
These devices are “rugged” RS-485 network repeaters used for
isolating network signals and extending communication
distances. Model 4683-TTM-x units are similar to the Acromag
Model 4SCR-TTM-x models, but add field-selectable, End-OfLine (EOL) network terminations on board for both the A and B
sides, and are UL approved.
Operation is transparent to all other network devices and no
handshaking is required. Up to 32 RS-485 devices can be
driven. These repeaters are enclosed in a rugged aluminum
enclosure and come ready to mount on any base plate, or can
be installed into a NEMA enclosure for harsh environments.
COMMUNICATION SPECIFICATIONS
Baud Rates: DIP switch settings on unit for 300, 600, 1200,
2400, 4800, 9600, 19.2K, & 38.4K baud rates. Only one
switch must be closed according to baud rate required for
proper operation.
RS-485 Bus Loading: One unit load equivalent.
RS-485 Bus Drive: Complete RS-485 compliance for up to 32
unit loads (31 unit loads if a repeater is used).
End-of-Line Termination Network: Refer to Figure 1. The
EOL termination network is individually selected for both
the A and B sides by a pair of shorting clips. The A side
(input) is controlled by jumpers J1 & J2. The B side
(output) is controlled by jumpers J3 & J4.
The EOL network termination is enabled for the A side or
the B side when the associated pair of jumpers are
positioned over pins 1 and 2. The EOL termination is
disabled (removed from circuit) when the pair of jumpers
are positioned over pins 2 and 3.
Duplex: Half duplex only.
Installation is as simple as mounting, setting the baud rate,
connecting and terminating the network, and connecting power.
Data Format: Ten bits typical (1 start bit, 8 data bits, and 1
stop bit). Other formats are supported.
FEATURES
Status Indicators: Red power LED; red RS-485 bus fault
LED’s, side A and side B; green transmit LED’s, A-to-B
and B-to-A.
●
No handshaking & No extra control lines required.
●
Full I/O signal isolation.
●
Supports baud rates of 300, 600, 1200, 2400, 4800, 9600,
19.2K, and 38.4K, switch-selectable.
●
Field-selectable, End-of-Line (EOL) network terminators on
both the A (input) and B (output) sides.
Relative Humidity (RH): 10 to 95% RH (noncondensing), up
to 40° C (104° F).
●
Transient protection installed to help protect connected
devices from destructive noise spikes and line transients.
Power: 115VAC ±10%, 50/60 Hz, 0.05A (Model 4683-TTM-1);
230VAC ±10%, 50/60 Hz, 0.03A (Model 4683-TTM-2).
●
Status LED’s indicate transmission direction, RS-485 bus
fault conditions, and power.
Power Line Fuse: 0.5A, 250V, 3AG type. Refer to Figure 1
for fuse location.
●
115VAC and 230VAC models supported.
Isolation: Unit includes galvanic and optical isolation between
RS-485 side A, RS-485 side B, AC power, and chassis
ground. Common mode voltages of up to 250Vrms, or
354V DC (withstands a 1500V AC dielectric strength test
for 1 minute without breakdown), are permitted on a
continuous basis. This complies with test requirements
outlined in ANSI C39.5-1974 for voltage ratings specified.
OPERATION
The Model 4683-TTM-1 & 4683-TTM-2 network repeaters are
used to isolate and boost RS485 signals and extend network
distance. Each repeater will permit the addition of up to
another 32 devices to a network, and extend the
communication distance another 4000 feet.
The repeater has two “sides” referred to as side A and side B.
Side A typically connects to the network towards the host (input
side). Side B connects to the extended network (output side).
Functionally, sides A and B are equivalent. Transient signal
protection is provided on both RS-485 sides. When both RS485 lines are idle, each side is in the receive mode. When a
one to zero transition is detected (signifying a start bit) on either
side, the opposite side’s transmitter is enabled (half-duplex).
The transmitter stays enabled for one character’s time (based
on the baud rate switch setting). The character received is then
passed through.
The repeater receives AC power through a three-screw terminal
strip. Input power is fused and isolated. Model 4683-TTM-1
units require 115VAC, 4683-TTM-2 units require 230VAC.
PHYSICAL SPECIFICATIONS
Operating Temperature: 0 to 70° C (32 to 158° F).
RFI Resistance: Withstands an RFI field strength of 10V per
meter at 27MHz, 151MHz, and 467MHz with no digital
effect, per SAMA PMC 33.1 test procedures.
Line Noise Effects: Field and power line terminals withstand
ANSI/IEEE C37.90-1978 Surge Withstanding Capability
(SWC) Test with no component failures. Unit is tested to
a standardized test waveform that is representative of
surges (high-freq. transient electrical interference),
observed in actual installations.
Communication Connections: Network repeater – both RS485 connections use modular terminal blocks with screw
clamps. Wire range is 14 to 26 AWG CSA approved.
Power Wire Connections: Network repeater terminal block.
See label on unit for power to be applied to unit.
Approvals: UL Listed, CSA Certified file LR25710.
Shipping Weight: 3.0 pounds (1.4 kg) packed per unit.

Acromag Incorporated, 30765 South Wixom Road • P.O. Box 437 • Wixom, MI • 48393-7037, USA
Phone: (248) 624-1541 • Fax: (248) 624-9234 • E-mail: [email protected] • On-Line: http://www.acromag.com
Copyright 1990, Acromag, Inc. Printed in the USA.
8500-267-B04C016
REPEATER INSTALLATION
Setting The Baud Rate
Mounting
The unit includes an 8-position DIP switch (S1) along the
bottom edge. This switch is used to set the baud rate of the
repeater. Only the switch that corresponds to the required
baud rate should be closed (refer to label information next to
S1)—all other switches must be left in the OPEN position.
Refer to Figure 1 below for mounting and clearance
dimensions.
This device is packaged in a rugged aluminum enclosure and
no auxiliary enclosure is required for most applications.
Mounting holes are provided for surface mounting the unit. You
may use an auxiliary enclosure to protect the unit in
unfavorable environments or vulnerable locations.
Electrical Connections (Refer To Drawing 4501-783)
Terminals can accommodate wire from 14-26 AWG, solid or
stranded.
Termination Jumpers
4.30
3.70
(109.22) (93.98)
RTN
24VDC
24VDC
D
D
RT
RT
RS-485
SIDE B
D
NC
D
COM
RT
acromag
POWER
0.30
(7.62)
TYP
RT
RS-485
SIDE A
Model 4683-TTM-X units include selectable End-Of-Line (EOL)
termination resistors that can be enabled or disabled by
positioning jumper blocks on headers installed on the circuit
board (see Figure 2). You will have to remove the top cover to
gain access to these jumpers. Be sure to turn power OFF
before removing the cover or setting these jumpers. Simply
remove the single screw on each side of the enclosure and
slide the top cover off. Refer to Figure 2 of the following page
to locate and set these jumpers as required for your installation.
Optionally, you may leave these jumpers in their disabled
position and attach 120Ω termination resistors externally,
between the RT terminals adjacent to the network connections.
COM
1. Network - Input (Side A) & Output (Side B): Connect unit
as shown in Figures 3 and 4. Be sure to enable EOL
termination as required at the ends of the network. Make
sure the baud rate DIP switches are set to match the data
rate of the network.
2. Power: Connect AC power as shown in Figure 4 according
to model number. Input power is fused (3AG type, 0.5A,
250V). Refer to Figure 2 to locate this fuse if the red power
LED fails to light with power applied.
3. Ground: Ground unit at AC input ground (G) terminal. The
chassis is common to this earth ground connection.
Any RS-485 network will require that the network be properly
terminated at the ends of a network, or network segment.
Termination is usually found at the first and last node of a
network segment. Since a repeater is used to segment a
network, two sets of termination resistors will be required. One
at the input side, one at the output side.
FAULT
A
1 - 300
2 - 600
3 - 600
4 - 2400
5 - 4800
6 - 9600 BAUD
7 - 19.2K RATE
8 - 38.4K
1 2 3 4 5 6 7 8
S1
TX
B - A
6.40
(162.56)
TX
A - B
FAULT
B
0.30
(7.62)
TYP
7.0
(177.80)
FIGURE 1
MODEL 4683-TTM-X REPEATER
MODEL 4SCR-TTM-X REPEATER
MECHANICAL DIMENSIONS
2.10
(53.34)
Acromag, Inc. Phone: (248) 624-1541 • Fax: (248) 624-9234
-2-
• E-mail: [email protected] • On-Line: http://www.acromag.com
EOL Jumpers
Side A (IN)
EOL JUMPERS
EQUIVALENT CIRCUIT
(4683 UNITS ONLY)
1
2
3
1
2
3
J1 J2
Status
LED's
J1 J2
EOL
EOL
DISABLED ENABLED
Vcc
FAULT
B
JUMPER PAIR
(ONE SIDE)
Status
LED's
Baud Rate
Switches
TX
A - B
TX
B - A
S1
1200 OHMS
1 - 300
BAUD 2 - 600
RATE 3 - 600
4 - 2400
8 7 6 5 4 3 2 1
D
FUSE 3AG
0.5A, 250V
EOL Jumpers
Side B (OUT)
1
2
3
1
2
3
FIGURE 2
RS-485
SIDE B
MODEL 4683-TTM-1 REPEATER
MODEL 4683-TTM-2 REPEATER
End-of-Line (EOL) Termination Jumper Locations.
Input Power Fuse Location.
COM D
RS-485
SIDE A
TR
D
D
EOL
ENABLED
TR
EOL
DISABLED
J1 J2
NC
J4 J3
24VDC
J4 J3
RS-485
SIDE B
J4 J3
COM
1
2
3
D
1
2
3
TR
1
1200 OHMS
D
2
F1
TR
3
POWER
REMOVE THIS SCREW ON EACH
SIDE TO REMOVE COVER
RTN
1
COM
2
24VDC
D
3
220 OHMS
FAULT
A
5 - 4800
6 - 9600
7 - 19.2K
8 - 38.4K
G W L1 4683-TTM-1 (115VAC)
G L2 L1 4683-TTM-2 (230VAC)
RS-485
SIDE A
D
COM D
AC (HI)
AC (LO)
GROUND
D
NETWORK CONNECTIONS
FIGURE 3
MODEL 4683-TTM-X REPEATER
STATION CONFIGURATION
HOST PC
RS-232
RS-485
1 - 300 5 - 4800
2 - 600 6 - 9600
3 - 600 7 - 19.2K
4 - 2400 8 - 38.4K
A-N32
Acromag
R
1
R
1
R
1
R
UP TO 32
NODES PER
NETWORK
SEGMENT
1 2 3 4 5 6 7 8
232 >
485
RS485
FAULT
485 >
232
POWER
FAULT
A
1 - 300 5 - 4800
2 - 600 6 - 9600
3 - 600 7 - 19.2K
4 - 2400 8 - 38.4K
D
D
RT
RTN
24VDC
RT
24VDC
1
R
ANY RS-485 DEVICE
NO TERMINATION RESISTOR
DFT
0
R
Acromag
RUN
ST
1
R
ST
DFT
0
DFT
1
0
R
UP TO 32
NODES PER
NETWORK
SEGMENT
1
R
1 2 3 4 5 6 7 8
BAUD
RATE
S1
TX
B - A
TX
A - B
FAULT
B
SIGNAL REPEATER
RS232-TO-RS485 SIGNAL CONVERTER
1
Acromag
RUN
ST
DFT
0
B-N32
Acromag
RUN
ST
DFT
0
MODEL 4683-TTM-1
MODEL 4683-TTM-2
acromag
BAUD
RATE
S1
COM
DFT
0
NC
DFT
0
Acromag
RUN
ST
COM
DFT
0
B-N5
B-N4
Acromag
RUN
ST
RS-485
SIDE B
1
B-N3
B-N1
RUN
ST
RT
D
D
RTN
24VDC
RT
RT
COM
24VDC
Tx
Rx
COM
TB 2
RS-485
TB 1
RS-232C
AC INPUT
MODEL 4SCC-TTM-1
MODEL 4SCC-TTM-2
POWER
DFT
0
RS-485
RS-485
B-N2
Acromag
RUN
ST
D
Acromag
RUN
ST
OUTPUT
(SIDE B)
A-N5
A-N4
Acromag
RUN
D
A-N1
RT
A-N3
A-N2
120
INPUT
(SIDE A)
RS-485
RS-485
SIDE A
120 OHM TERMINATION
RESISTOR REQUIRED
THIS END
acromag
NETWORK SEGMENT 2
(EXTENDED NETWORK)
UP TO 4000 FEET
NETWORK SEGMENT 1
UP TO 4000 FEET
SIDE-A EOL TERMINATION
JUMPERS ENABLED
SIDE-B EOL TERMINATION
JUMPERS ENABLED
ANY RS-485 DEVICE
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.
The station configuration drawing of Figure 3 is for general illustration purposes only. Johnson
Controls customers should instead refer to the Metasys® Network Technical Manual for N2 Bus
Communication connections using the 4683-TTM-x repeater.
Acromag, Inc. Phone: (248) 624-1541 • Fax: (248) 624-9234
-3-
• E-mail: [email protected] • On-Line: http://www.acromag.com
HOST PC
TRANSMIT DIRECTION
RS232-TO-RS485 AND RS485-TO-RS232
RED RS485 FAULT LED
SET BAUD RATE AT S1
RED POWER LED
232 >
485
S1
1 - 300 5 - 4800
2 - 600 6 - 9600
3 - 600 7 - 19.2K
4 - 2400 8 - 38.4K
BAUD
RATE
8 7 6 5 4 3 2 1
S1 - SET BAUD RATE
TO MATCH BAUD
RATE OF NETWORK.
RS232 TO RS485 CONVERTER
MODEL 4SCC-TTM-X
acromag
S1 - BAUD RATE
1 - 300 5 - 4800
2 - 600 6 - 9600
3 - 1200 7 - 19.2K
4 - 2400 8 - 38.4K
RS232 CONNECTIONS
TO HOST COMPUTER
-1 OPTION -2 OPTION
115VAC
230VAC
L1 AC (HI) L1 AC (HI)
W AC (LO) L2 AC (LO)
G Ground G Ground
POWER
B
5 6 7 8 9 10 11 12 13
TB 1
RS-232C
1 2 3 4
AC INPUT
Rx
COM
TB 2
RS-485
Tx
D
D
TR
TR
RTN
COM
24VDC
24VDC
NC
A-N1
ABC
L1 W 115VAC
L1 L2 230VAC
2 TX
TX
3 RX
RTS
CTS
DB25
1 2
DE9
C
7
COM
RS232
B
R
C
A-N3
DSR
COM
CD
HOST
DE9
A
A-N2
RX
2 TX
TX
3 RX
COM
5 COM
R
NOTE: JUMPERED PINS ARE
NULL-MODEM CONNECTIONS
WHICH ALLOW COMMUNICATION
BETWEEN THE HOST AND
ACROMAG SERIES 4100/4200
I/O STATIONS.
UP TO 32
NODES PER
NETWORK
SEGMENT
ANY
RS485
DEVICES
RX
OR
3 4 5
120 OHM
TERMINATION
REQUIRED
A
TO HOST
GROUND
POWER
CONNECTION
HOST
DB25
SIGNALS AT
CONVERTER
14 15 16 17 18 19 20 21 22 23 24 25
RS485
FAULT
6 7 8 9
485 >
232
FIGURE 4
A-N30
R
MODEL 4SCC-TTM-X CONVERTER
MODEL 4683-TTM-X REPEATER
SYSTEM CONNECTIONS
R
A-N31
-1 OPTION -2 OPTION
115VAC
230VAC
L1 AC (HI) L1 AC (HI)
W AC (LO) L2 AC (LO)
G Ground G Ground
RS485
B-N3
B-N2
SEE UNIT LABEL
TO VERIFY POWER
REQUIREMENTS
B-N5
B-N4
B-N32
B-N1
A-N32
24VDC
D
RTN
COM
24VDC
D
RT
RT
NC
COM
RS-485
SIDE B
D
D
RT
RT
NC
RS-485
SIDE A
IMPORTANT:
MODEL 4683-TTM-X UNITS
INCLUDE INTERNAL, FIELD
SELECTABLE END-OF-LINE
(EOL) TERMINATION
RESISTORS FOR THE A AND
B SIDES. THESE ARE
ENABLED VIA INTERNAL
JUMPERS. DO NOT USE
EXTERNAL TERMINATION
WITH INTERNAL EOL
JUMPERS ENABLED.
EXTENDED NETWORK
RS485
RS485 REPEATER
MODEL 4683-TTM-X
acromag
R
R
R
R
UP TO 32
NODES PER
NETWORK
SEGMENT
NOTE: SIDE-A AND SIDE-B EOL
TERMINATION JUMPERS ENABLED
POWER
FAULT
A
1 - 300 5 - 4800
2 - 600 6 - 9600 BAUD
3 - 600 7 - 19.2K RATE
4 - 2400 8 - 38.4K
1 2 3 4 5 6 7 8
S1
TX
B - A
TX
A - B
FAULT
B
ANY RS-485 DEVICE
RED POWER LED
RED RS485 FAULT LED (SIDE B)
R
S1 - SET BAUD RATE
TO MATCH BAUD
RATE OF NETWORK.
RED RS485 FAULT LED (SIDE B)
TRANSMIT DIRECTION
RS232-TO-RS485 AND RS485-TO-RS232
120 OHM TERMINATION
RESISTOR REQUIRED
AT END OF NETWORK
OR LAST DEVICE ONLY
S1 - BAUD RATE
1 - 300 5 - 4800
2 - 600 6 - 9600
3 - 1200 7 - 19.2K
4 - 2400 8 - 38.4K
The system connection drawing of Figure 4 is for general illustration purposes only. Johnson Controls
customers should instead refer to the Metasys® Network Technical Manual for N2 Bus Communication
connections using the 4683-TTM-x repeater.
Acromag, Inc. Phone: (248) 624-1541 • Fax: (248) 624-9234
-4-
• E-mail: [email protected] • On-Line: http://www.acromag.com