Instruction manual

accQcomm Interface Module
Section 1 Introduction
1-5
1.5 Technical
Specifications
Table 1-1 lists the technical specifications for the accQcomm.
Table 1-1 accQcomm Technical Specifications
Physical
Dimensions (H x W x D) 2.75 in (70 mm) x 10.5 in (267 mm) x 5.62 in (143 mm)
Weight 2.06 pounds (.95 kg)
Material
Polycarbonate
Enclosure NEMA 1, IP20
Power Requirements
Negative System Power must be
connected to Chassis Ground, and
should be Earth-Grounded.
9 to 30 VDC
@ 12VDC: Typically < 475 mA, max 600mA
@ 24VDC: Typically < 250 mA, max 300mA
Temperature -4 to 158° F (-20 to 70° C), operating and storage
Display Type Backlit 1” x 3” LCD, 4 lines, 80 characters
Communication
Analog Output Channels Number of channels 0 to 4
Output range 4-20 mA
Maximum load 600 
Isolation: Output galvanically isolated from DC power, from the network,
and from other outputs
Accuracy:
Integral nonlinearity: ±0.012% max
Offset (0 mA or 4 mA) (Ta = 25°C): ±0.05%max
Offset Drift: 50 ppm/°C max
Total Output Error (20 mA or 24 mA)(Ta = 25°C): ±0.15% max
Total Output Error Drift: 50 ppm/°C max
PSRR: 10 µA/V max
Resolution: 16 bits, 244 µA, 0.0015% of 16 mA span
Relay Alarm Outputs Number of alarms 8
Type Normally open, solid state
Maximum contact resistance 35 
Sampler Pacing Contact closure pulses are 100ms long,
separated by 100ms pause
Serial Data Communication Total ports 8
Input type RS232 3 DB9 Connector
Input type RS422 3 Terminal Strip
Output type MODBUS 232 1 DB9 Connector
Output type MODBUS 485 1 Terminal Strip
MODBUS protocols ASCII, RTU
Setup and Data Retrieval PC compatible computer running accQcomm Configuration Software, or
utility software such as HyperTerminal
Ethernet Communication Ethernet port (Input inductor recommended: Steward #28B2024-0A0 or
equivalent)
Modem External connection RS232 serial connector
Communication Speeds Supported 1200, 2400, 4800, 9600, 12000, 19200, 38400, 57600 (default) bps