M-system 27U Instruction Manual page 2

TERMINAL CONNECTIONS
Connect the module as in the diagram below.
■ EXTERNAL DIMENSIONS unit : mm (inch)
2–4.5 (.18) dia.
MTG HOLE
7.6 (.30) dia.
■ CONNECTION DIAGRAM
4
3
INPUT *
1
2
1
*1. Input Connection Examples
DC MILLIVOLT
4
– 3
INPUT
+ 2
1
THERMOCOUPLE
• Single input
4
comp. leadwire
–
– 3
+
2
+
1
• Dual input
–
4
+
– + 3
SENSOR 2
+
– + 2
SENSOR 1
comp. leadwire
1
*2. Limited to 250 – 500Ω when using the communication
to configure the module.
44 (1.73) dia.
33 (1.30)
16.5 (.65)
+ –
1 4
2 3
6–M3 SCREW
24V DC
+
*
2
OUTPUT LOAD
–
4 – 20mA DC
RTD & RESISTANCE
• Two-wire
4
B
3
2
1
A
• Three-wire
4
B
3
B
2
1
A
• Four-wire
4
B
3
B
2
A
1
A
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: +81(6)6659-8201 Fax: +81(6)6659-8510 E-mail: info@m-system.co.jp
20.7 (.81)
6 (.24) dia. 19.5 (.77)
12.7 (.5)
WIRING INSTRUCTIONS
■ SCREW TERMINAL
Torque: 0.5 N·m
CHECKING
1) Terminal wiring: Check that all cables are correctly con-
nected according to the connection diagram.
2) Input: Check that the input signal is within 0 – 100% of
full-scale.
If the thermocouple / RTD or its extension wires are bro-
ken, the output goes over 100% (below 0% with down-
scale) due to the burnout function. Check leadwires in
such a case.
3) Output: Check that the load is within the permissible
limit including wiring resistance.
Load Resistance (Ω) =
ADJUSTMENT PROCEDURE
To calibrate the signal to match with a receiving instru-
ment or to change the factory-set configurations, use the PC
Configurator software installed on a Windows PC via the
Bell202 Modem (model COP-HU).
The PC Configurator software is downloadable at M-Sys-
tem's web site: http://www.m-system.co.jp
LIGHTNING SURGE PROTECTION
M-System offers a series of lightning surge protector for
protection against induced lightning surges. Please contact
M-System to choose appropriate models.
27U
Supply Voltage (V) – 9 (V)
0.023 (A)
(including leadwire resistance)
EM-7656-A Rev.3 P. 2 / 2