BusWorks® Model 989EN U
ser’s Manual Modbus TCP/IP Digital I/O & Counters
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Acromag, Inc. Tel:248-295-0880 Fax:248-624-9234 Email:
33
TECHNICAL REFERENCE
•
Safety Agency Approvals
– CE, UL, & cUL listed, plus Class I; Division
2; Groups A, B, C, D approval. (989EN-4016
ONLY
)
•
Fully Isolated
– I/O channels, network, and power are all isolated from
each other for safety and increased noise immunity.
•
Modbus TCP/IP Protocol Support
–
Supports up to 5 sockets/ masters
using port number 502 (Modbus TCP/IP Default).
•
Flexible IP Addressing
– Supports static or DHCP.
•
Built-In Web Pages -
Allow unit to optionally be configured, controlled,
and monitored via access with a standard web browser over Ethernet.
•
Convenient “Wink” ID Mode Support
– Blinks green RUN LED in wink
mode as a tool to help identify specific remote units.
•
Network Port is Transient Protected
– Shielded RJ45 port includes
transient protection from ESD, EFT, and other transients.
•
10Base-T and 100Base-TX Support
– Auto-negotiated 10/100Mbps,
Half or Full Duplex.
•
Input Event Counters
– Input channels can be used as a 32-bit event
counter for signals up to 150 Hz. Counters have selectable up/down
counting, selectable count edge, and programmable debounce.
This
feature is only available on the 989EN-4016 model.
•
Programmable Debounce
– Event counters are equipped with
programmable debounce from 0
– 65535 ms. This function is useful for
eliminating false counts from electro-mechanical relay contact bounce
and other mechanical effects.
•
Counter Alarm Output
– Counters can be set to output upon rollover
condition. The output will toggle state, and reset either upon next event
count (momentary alarm), or from a manual reset (latched alarm).
•
Nonvolatile Counter Memory
– Allows the count value to be restored
after power loss to model.
•
Last Count Timer
– Event counters are equipped with a timer that will
display the last count value up to 65535ms. The timer has the option of
setting a time limit to identify a stoppage in incoming pulses.
•
Plug-In Terminal Blocks & DIN-Rail Mount -
Make mounting, removal,
and replacement easy.
•
Flexible Discrete Inputs & Outputs
- High voltage/current open-drain
outputs provide direct (low-side) control of external devices. Buffered
inputs allow outputs to be read back, or input levels to be monitored.
•
Outputs Have Built-in Protection
– Over-temperature/current shut-
down protection is built-in and includes active clamping circuitry for
switching inductive loads.
•
Nonvolatile Reprogrammable Memory
– Allows the functionality of this
device to be reliably reprogrammed thousands of times.
•
Tandem Input/Output Circuitry for Loopback Monitoring
- Input
buffers are connected in tandem with open-drain outputs for convenient
loop-back monitoring of the output states.
•
Inputs Have Programmable “Wetting” Current Sources Built-In –
Inputs have built-in current sources that eliminate the need to add pull-
ups. This also facilitates I/O self-test without adding wiring other than
the required external excitation. Wetting current is used to sense switch
closure at an input and can be set to 16mA or 2mA. By default, it will
fold back from 16mA to 2mA, 20ms after the input crosses the 4V
threshold. This is to provide higher levels of current during switch
closure, which helps to reduce oxide buildup on switch contacts.
KEY FEATURES
