M-system 27PM User manual

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

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: +81(6)6659-8201 Fax: +81(6)6659-8510 E-mail: info@m-system.co.jp

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)

–+

7.6 (.30) dia.

■CONNECTION DIAGRAM

LOAD

OUTPUT

24V DC

4 – 20mA DC

POTENTIOMETER

*1. Limited to 250 – 500Ω when using the communication to configure

the module.

–

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: +81(6)6659-8201 Fax: +81(6)6659-8510 E-mail: info@m-system.co.jp

EM-7657-A Rev.2 P. 3 / 3

FUNCTION MONITOR LED (option /M)

■FUNCTION MONITOR LED

–+

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

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

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