Veris A8911–23 Datasheet
A8911–23
Pulse Input Module
Up to 23 Separate Pulse Inputs
VERIS INDUSTRIES
A8 911 -2 3
DESCRIPTION
The A8911-23 Input Module provides an easy way to integrate multiple pulse output
devices to Modbus systems such as the Veris AcquiSuite data acquisition network.
The A8911-23 accepts up to 23 standard pulse sensors and can function as a slave
device with any Modbus master. This data can be networked to other critical energy
sensors such as Veris Modbus power meters to provide a comprehensive energy
monitoring solution.
APPLICATIONS
● Demand response program control and reporting
● Cost allocation to tenants and third parties
● Measurement and verication of energy savings
● Gas, water, steam, and BTU meters
network integration
● Monitoring performance of building systems (e.g., chillers, boilers, fans)
FEATURES
● External communications via shielded twisted pair 18-22 gauge wire...allows
communication up to 4000 feet
● Pulse input communication up to 200 feet using 18-24 gauge control wire
● DIN rail mounting...quick and easy installation
● Onboard DIP switches for Modbus addressing
● Industry standard pulse inputs connect to most pulse output meters
● LED verication of RS-485 Modbus TX/RX communications
● LED indicators for each pulse input...fast indication and verication of pulses
● Non-volatile memory retains conguration and pulse count totals during
power failures
SPECIFICATIONS
Processor ARM 7, eld upgradable rmware
LED 23 input status LEDs (red), 2 Modbus T X/RX (yellow), 1 power/alive status (green)
Protocols Modbus/ RTU
Power Supply 9VDC to 30VDC, 200mA (not included)
Serial Port RS-485 2-wire, 19200 or 9600 baud. N81
Pulse Inputs 23 independent pulse count inputs; 32-bit pulse counter; rolls over at 4.295 billion per channel;
Intended for use with dry contact outputs; puls e count values stored in nonvolatile memor y; Pulse rate/width user s electable to 10 Hz, 50 Hz, or 100 Hz
Minimum Pulse Width:
10 Hz Mode 50 msec
50 Hz Mode 10 msec
100 Hz Mode 5 msec
Contact Closure Threshold 100 Ω to 5 kΩ (user selec table)
Isolation Pulse inputs, power input s and RS-485 are non-isolated
Operating Environment:
North America Indoor, 0° to 50°C (32° to 122°F), 0-95% RH noncondensing
Agency Approvals FCC CFR 47 Part 15, Class A
A8911-23 is sold as an open device.
Observe handling precautions for static sensitive
devices to avoid damage to the circuitry which
would not be covered under the factory warranty.
800.354.8556
Year
2
Warranty
+1 503.598.4564
www.veris.com
HQ0001806.B 01131
800.354.8556
3.4”
(86 mm)
4.2”
(106 mm)
1.2”
(31 mm)
+1 503.598.4564
APPLICATION/WIRING EXAMPLE
Up to 23 standard
pulse output devices
www.veris.com
A8911-23
Modbus or Pulse Output
Energy Meters
(Veris H803x or H805x Enercept)
Branch Current
Power Meter
(Veris E30 or E31)
H8163
with Comms Board
Option
DIMENSIONAL DRAWING
Local PC
RS-485
Modbus
Data Acquisition Devices
(Veris H8822 or A8810)
network integration
ORDERING INFORMATION
MODEL MANUF. PART # DESCRIPTION
U013-0010 A8911-23 Pulse input module (up to 23 standard pulse devices)
HQ0001806.B 01131
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