DLS-qR1
P. 5 / 5EM-6515-R1 Rev.8
MG CO., LTD. www.mgco.jp
5-2-55 Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
• Connecting to the Modem
Use a straight-type RS-232-C cable.
• Connection between the Modems
Two-wire connection is to be used between the modems.
• Connecting to the Power Source
For models DLS-xR1xx-K or -L, connect an AC supply
source across the terminal U and V.
For models DLS-xR1xx-S or -R, connect a DC supply
source across the terminal U(+) and V(–).
• Twisted-Pair Cable
1) Use a cable at the minimum of 0.9 mm diameter.
2) Connect between the LINE terminal (+) and (+), (–) and
(–) of the corresponding units.
3) Install transmission cables in a general instrumentation
cable pit or rack, separate from those for power supply
cables, in order to prevent noise interference.
• Fiber Optics
1) Connect a fiber link connector to Fiber Link terminal.
2) Observe an enough radius when bending fiber optics ca-
bles.
3) Follow installation instructions by the cable manufac-
turer.
• Euro Type Connector Terminal
Power supply, twisted-pair cable transmission line, RUN
contact output are connected at the terminal block.
The terminal block is composed of the base connector and
the removable plug. Clamp the cable with the screw in the
clamping unit. Solid cables must be with a pin terminal.
Stranded cables must be of 1.4 mm dia. at the maximum.
DO NOT solder wires in stranded cables.
Refer to ‘Terminal Assignment, Euro Type Connector Ter-
minals’ for connection of euro type connector terminal.
TERMINALTING RESISTOR
A transmission line via twisted-pair cables needs to have
terminating resistors in order to prevent the transmission
waveform from reflecting at the ends of the line.
Each DLS unit incorporates a terminating resistor which
is connected with a jumper across the terminating resistor
terminals. When the system is composed of three or more
units, remove the jumper from those which are not at the
both ends of transmission line in order to disconnect the
terminating resistors.
STATION ADDRESS
Station number (Station Address = SA) is selectable with
the front accessed DIP rotary switches (SA1 and SA2), from
00H to FFH.
Assign an even number to one unit and assign the consecu-
tive one to the paired unit.
For example, assign “02” and “03,” or “1A” and “1B.”
More than two units cannot be paired.
FIELD CALIBRATION
The unit is factory calibrated to the referenced accuracy.
Field calibration is available by using the Programming
Unit (model: PU-2A) which can be purchased separately.
CHECKING
1) Check that all cables are correctly wired according to the
connection diagram. Check polarity of the transmission
cables and power supply cables.
2) Check Station Address.
3) Terminating resistor (required only for units at the both
ends of transmission line)
4) Check the I/O signals. Measure the voltage across each
of the input terminals (No.1 through 16) and the output
terminals (No.21 through 36) and the common negative
(No.19, 20, 39, 40).
LIGHTNING SURGE PROTECTION
In order to prevent lightning surges entering through pow-
er supply line and signal line, proper surge protection will
be required. Specify our M-RESTER Series Lightning Surge
Protectors.
