EMS EMS520 User manual

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EMS520 MANUAL VOLUME 2
Rev 1.5 Electrical Wiring Guide
Prepared by Michael L. Kominske
Environmental Monitor Service Inc.
MAY 5, 2017
ENVIONMENTAL MONITOR SERVICE, INC.
POB 4340, Yalesville, CT 06492
[email protected]

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Table of content
GUIDELINES FOR USER SAFETY AND EQUIPMENT PROTECTION................................................................................................................3
SECTION 1-INSTALLATION ELECTRICAL CONNECTIONS.........................................................................................................3
PORT 1RS485 MODBUS NETWORK WIRING....................................................................................................................................5
PORT 1&2 INFORMATION..............................................................................................................................................................5
SECTION 2-OPTIONAL RELAYS &INPUTS ..........................................................................................................................................7
OPTIONAL 4-20MA OUTPUTS.........................................................................................................................................................8
OPTIONAL SNAP IN CONNECTIONS...................................................................................................................................................9
SMART SERVICE MODULE (SSM) COMPONENTS..............................................................................................................................10

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GUIDELINES FOR USER SAFETY AND EQUIPMENT PROTECTION
This manual is intended to aid trained and competent personnel in the installation of this equipment. Only a technician or
engineer trained in the local and national electrical standards should perform tasks associated with the electrical wiring of
this device.
Warnings
▪Under no circumstances will Environmental Monitor Service, Inc. be liable or responsible for any consequential
damage that may arise because of installation or use of this equipment.
▪All examples and diagrams shown in the manual are intended to aid understanding. They do not guarantee
operation.
▪Environmental Monitor Service, Inc. accepts no responsibility for actual use of this product based on these examples.
▪Due to the great variety of possible applications for this equipment, the user must assess the suitability of this
product for specific applications.
▪Make sure to have safety procedures in place to stop any connected equipment in a safe manner if the controller
should malfunction or become damaged for any reason.
▪Do not replace electrical parts or try to repair this product in any way.
▪Only qualified factory trained service personnel trained in its operation should open the device’s housing or carry
out repairs.
▪The manufacturer is not responsible for problems resulting from improper or irresponsible use of this device.
▪You may cause an electric shock, fire or damage the equipment if you ignore any of these safety precautions. Section
1-Installation Electrical connections
NOTE: If using negative draft or plant air disregard blower and SW1&2 information.

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PORT 1 RS485 MODBUS NETWORK WIRING
Use cables to network devices that meet specs of Belden Cable P/N 3106A Multi -Conductor –EIA Industrial RS-485
PLTC/CM or equivalent:
•22AWG stranded (7x30) tinned copper conductors, Datalene insulation, twisted pairs, overall Beldfoil shield(100%
coverage) plus a tinned copper braid(65% coverage), drain wire, UV resistant PVC jacket.
•Impedance of 120 ohms
•Network cables cannot exceed 1219 meters, 4,000 ft.
•If Longer distance is required, wireless option should be considered. Please contact the factory .
•If Longer distance is required, wireless option should be considered. Please contact the factory .
PORT 1&2 INFORMATION
Port 1: RS-485 to customers DAS, Recorder, etc.
Port 2: RS-485 to SSM for factory use only.

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RS485: PIN OUT
Use RS485 to create a multi-drop network containing up to 32 devices.
Note: port #1 is set to RS485
▪Note that the ports are not isolated. If
controller is used with a non-isolated
external device, avoid potential voltage
that exceeds +/- 10V. To avoid damaging
the system, all non-isolating device ports
should relate to the same ground signal.
▪Use shielded, twisted pair cables.
▪Minimize the stub (drop) length leading
from each device to the bus.
▪Ideally, the main cable should be run in and out of the network device.
Do not cross positive (A) and negative (B) signals. Positive terminals must be wired to positive and negative terminals to
negative.

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SECTION 2-OPTIONAL RELAYS & INPUTS
EMS520 Analog output wiring list
Ch 1-4, Analog 4-20mA outputs Com -COM
Positive 4-20mA output CH1 - Aout0
Positive 4-20mA output CH2 - Aout1
Positive 4-20mA output CH3 - Aout2
Positive 4-20mA output CH4 - Aout3
EMS520 Relay Group 2 output wiring list
Group 2 Relays
In CAL to DAS (6 Minutes) - 08
Zero solenoid command contact (3 Minutes) -
09
Span solenoid command contact (3 Minutes) -
10
High mg Alarm - 11
High Opacity Alarm - 12
High Opacity/mg Alarm Silence - 13
Fault relay, Normal=0; Fault on When = 1 - 14
Early warning Hi mg - 15
Early warning Opacity - 16
COM for Relays 08-16
4-20mA
Outputs
Relays: Max 30Vdc
or 120Vac, 8A

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OPTIONAL 4-20MA OUTPUTS
channels. The ranges are set during final test to the information supplied by the customers. Field changes can be made in
the setup page. Maximum output Loop compliance is 500 Ohms.
Description
Connections
Common for mA outputs
COM
Positive 4-20mA output CH1
Aout0
Positive 4-20mA output CH2
Aout1
Positive 4-20mA output CH3
Aout2
Positive 4-20mA output CH4
Aout3

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OPTIONAL SNAP IN CONNECTIONS
COM for 4-20mA
outputs
AOUT 0 is Ch-1
AOUT 1 IS Ch-2
AOUT 2 is Ch-3
AOUT 3 is CH-4

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SMART SERVICE MODULE (SSM) COMPONENTS