M-system 27PM User manual

5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: [phone] Fax: [phone] E-mail: [e-mail]
EM-7657-A Rev.2 P. 1 / 3
INSTRUCTION MANUAL
POTENTIOMETER TRANSMITTER
(PC programmable) MODEL 27PM
BEFORE USE ....
Thank you for choosing M-System. Before use, please check
contents of the package you received as outlined below.
If you have any problems or questions with the product,
please contact M-System’s Sales Office or representatives.
■PACKAGE INCLUDES:
Signal conditioner ...............................................................(1)
■MODEL NO.
Confirm Model No. marking on the product to be exactly
what you ordered.
■INSTRUCTION MANUAL
This manual describes necessary points of caution when
you use this product, including installation, connection and
basic maintenance procedures.
POINTS OF CAUTION
■CONFORMITY WITH EU DIRECTIVES
• The actual installation environments such as connected
devices and connected wires may affect the protection
level of this unit when it is integrated in a panel system.
The user may have to review the CE requirements in re-
gard to the whole system and employ additional protec-
tive measures to ensure the CE conformity.
■GENERAL PRECAUTIONS
• Before you remove the module, turn off the power supply
and input signal for safety.
■ENVIRONMENT
• When heavy dust or metal particles are present in the air,
install the module inside proper housing with sufficient
ventilation.
• Do not install the module where it is subjected to con-
tinuous vibration. Do not subject the module to physical
impact.
• Environmental temperature must be within -40 to +85°C
(-40 to +185°F) with relative humidity within 0 to 95%
RH in order to ensure adequate life span and operation.
■WIRING
• Do not install cables close to noise sources (relay drive
cable, high frequency line, etc.).
• Do not bind these cables together with those in which
noises are present. Do not install them in the same duct.
■AND ....
• The module is designed to function as soon as power is
supplied, however, a warm up for 10 minutes is required
for satisfying complete performance described in the data
sheet.
COMPONENT IDENTIFICATION
Specifications
INSTALLATION unit : mm (inch)
This module is suitable for mounting inside a DIN type B
head.
33 (1.30)
2–M4 SCREW
The screws are to be provided by the customer.

27PM
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: [phone] Fax: [phone] E-mail: [e-mail]
EM-7657-A Rev.2 P. 2 / 3
TERMINAL CONNECTIONS
Connect the module as in the diagram below.
■EXTERNAL DIMENSIONS unit : mm (inch)
44 (1.73) dia.
6.3
(.25)
33 (1.30) 6 (.24) dia.
16.5 (.65)
6–M3 SCREW
2–4.5 (.18) dia.
MTG HOLE
20.7 (.81)
19.5 (.77)
12.7 (.5)
14
32
–+
7.6 (.30) dia.
■CONNECTION DIAGRAM
LOAD
OUTPUT
24V DC
4 – 20mA DC
*1
POTENTIOMETER
*1. Limited to 250 – 500Ω when using the communication to configure
the module.
+
–
4
1
3
3
2
1
max.
min.
+
–
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 voltage between terminal 3 – 4 is
within 0 – 100% of full-scale.
If the potentiometer wires are broken, the output goes
over 100% (below 0% with downscale) due to 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) = Supply Voltage (V) – 9 (V)
0.023 (A)
(including leadwire resistance)
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.

27PM
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: [phone] Fax: [phone] E-mail: [e-mail]
EM-7657-A Rev.2 P. 3 / 3
FUNCTION MONITOR LED (option /M)
■FUNCTION MONITOR LED
32
41
–+
Function
Monitor LED
■INPUT MONITOR: The input 0 – 100% is converted into a combination of 1-second (1 unit) and 0.25-second (0.2 unit) cycled
pulses. 1 unit corresponds to 25%, while 0.2 unit corresponds to 5%. 0% equals to 1 unit, while 100% cor-
responds to 5 units. The input % is represented in the total number of 1-unit pulses and 0.2-unit pulses,
repeated in the sequence of ‘1-unit pulses ––> 0.2-unit pulses ––> OFF for 1 second or more.’
[Examples]
25% = 2 units
30% = 2.2 units
45% = 2.8 units
50% = 3 units
100% = 5 units
0% = 1 unit
≥1 second
1 UNIT
25%
ON OFF
1 sec.
0.2 UNIT
5%
0.25 sec.
■ERROR MONITOR: Indicates the transmitter’s error status.
Lower overrange: The input signal is lower than the out-
put’s lower range limit.
2 sec. cycle
0.125 sec. OFF
Upper overrange: The input signal is higher than the out-
put’s upper range limit.
0.125 sec. OFF - ON - OFF
2 sec. cycle
Burnout: Sensor wire breakdown is detected.
0.125 sec. ON - OFF
Internal error: The CPU detects an internal error.
0.125 sec. ON - OFF - ON
1 sec. cycle