BusWorks
Model 903MB/902MB/901MB Network I/O Module User’s Manual Digital I/O
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General I/O Specifications
I/O Pullups & Socket:
I/O channels include sockets for
installation of optional SIP resistor networks to act as
pullups for the channel. A SIP socket is included for
each group of four channels (port) and a 5.6K
Ω
resistor
SIP is installed from the factory. The even-numbered
pins of these sockets (common leads) connect to the port
EXC+ terminal. An external excitation supply is typically
connected between the EXC+ and RTN terminals of the
port. Refer to Drawing 4501-811 for jumper and socket
locations. The recommended SIP resistor is a four
isolated resistor type (8 pins) and may be obtained from
Acromag or another vendor. These SIP resistors
typically come rated for 0.2W, 0.3W, or 0.4W per
element. For example, refer to Bourns 4308R-102,
4308M-102, or 4308H-102 parts. You may also refer to
Dale CSC08C03, MSP08C03, or MSM08C-03 parts. The
5.6K
Ω
SIP provided is a high-power type from Bourns
(part number 4308H-102-562) and is rated at 0.4W per
resistor up to 70
°
C.
IMPORTANT:
When selecting a SIP resistor, be sure to
limit the individual resistor power dissipation to less than
the rated power per element. This is 0.4W for the 5.6K
Ω
SIP resistor installed from the factory. Further, do not
exceed 500mA of drain current per output, or 2A total per
RTN terminal.
Excitation:
External excitation voltage is applied between
the port EXC+ and RTN terminals and must be limited to
35V or less. The EXC+ terminal is tied to the even-
numbered pins of the resistor SIP socket provided for
each port or group of 4 channels. See Drawing
4501-811.
ENCLOSURE/PHYSICAL SPECIFICATIONS
See Enclosure Dimensions Drawing 4501-815. Units are
packaged in a general purpose plastic enclosure that is DIN rail
mountable for flexible, high density (approximately 1” wide per
unit) mounting.
Dimensions
: Width = 1.05 inches, Height = 4.68 inches, Depth
= 4.35 inches (see Drawing 4501-815).
DIN Rail Mounting (-xx0x):
DIN rail mount, Type EN50022; “T”
rail (35mm).
Connectors:
Removable plug-in type terminal blocks; Current/
Voltage Ratings: 15A/300V; Wire Range: AWG #12-24,
stranded or solid copper; separate terminal blocks provided
for inputs, power/network, and outputs. Supply connections
should use No. 14 AWG copper wires rated for at least 75
°
C.
Case Material:
Self-extinguishing NYLON type 6.6 polyamide
thermoplastic UL94 V-2, color beige; general purpose NEMA
Type 1 enclosure.
Printed Circuit Boards:
Military grade FR-4 epoxy glass.
Shipping Weight:
1 pound (0.45 Kg) packed.
APPROVALS (-xxx0)
0
: Agency Approvals – CE marked, per EMC Directive
2004/108/EC. UL Listed (USA & Canada). Hazardous Locations
– Class I, Division 2, Groups A, B, C, D. Consult Factory.
ENVIRONMENTAL SPECIFICATIONS
Operating Temperature:
-25
°
C to +70
°
C (-13
°
F to +158
°
F).
Storage Temperature:
-40
°
C to +85
°
C (-40
°
F to +185
°
F).
Relative Humidity:
5 to 95% non-condensing.
Power Requirements:
Non-polarized 10-36V DC SELV (Safety
Extra Low Voltage), or 22-26 VAC. See table for current.
CAUTION:
Do not exceed 36VDC peak, to avoid damage
to the module.
Table 8: 901/902/903MB-0900 Supply Current
Supply
Current Draw
10V
85mA Typical, 130mA Maximum
12V
72mA Typical, 105mA Maximum
15V
55mA Typical, 80mA Maximum
24V
39mA Typical, 54mA Maximum
36V
29mA Typical, 39mA Maximum
24VAC
72mA Typical, 95mA Maximum
IMPORTANT - External Fuse
: If unit is powered from a
supply capable of delivering more than 1A to the unit, it is
recommended that this current be limited via a high surge
tolerant fuse rated for a maximum current of 1A or less
(for example, see Bel Fuse MJS1).
Isolation:
The I/O, network, and power circuits are isolated from
each other for common-mode voltages up to 250VAC, or
354V DC off DC power ground, on a continuous basis (will
withstand 1500VAC dielectric strength test for one minute
without breakdown). This complies with test requirements of
ANSI/ISA-82.01-1988 for the voltage rating specified. I/O
points are not isolated channel-to-channel and share a
common (RTN) connection.
Installation Category:
Designed to operate in an installation in a
Pollution Degree 2 environment with an installation category
(Overvoltage Category) II rating.
Radiated Field Immunity (RFI):
Complies with IEC1000-4-3
Level 3 (10V/M, 80 to 1000MHz AM & 900MHz keyed) and
European Norm EN50082-1.
Electromagnetic Interference Immunity (EMI):
Inputs and
outputs do not change states under the influence of EMI from
switching solenoids, commutator motors, and drill motors.
Immunity per BS EN 61000-6-1:
1)
Electrostatic Discharge Immunity (ESD), per IEC 61000-4-
2.
2) Radiated Field Immunity (RFI), per IEC 61000-4-3.
3) Electrical Fast Transient Immunity (EFT), per IEC 61000-
4-4.
4) Surge Immunity, per IEC 61000-4-5.
5) Conducted RF Immunity (CRFI), per IEC 61000-4-6.
Emissions per BS EN 61000-6-3:
1) Enclosure Port, per CISPR 16.
2) Low Voltage AC Mains Port, per CISPR 14, 16.
3) DC Power Port, per CISPR 16.
4) Telecom / Network Port, per CISPR 22.
Note: This is a Class B product.
IMPORTANT:
Power, input, and output (I/O) wiring must be in
accordance with Class I, Division 2 wiring methods of Article 501-
4(b) of the National Electrical Code, NFPA 70 for installations in
the US, or as specified in section 18-1J2 of the Canadian
Electrical Code for installations within Canada and in accordance
with the authority having jurisdiction.
This equipment is suitable for use in Class I, Division 2,
Groups A, B, C, and D, or non-hazardous locations only.
WARNING – EXPLOSION HAZARD –
Substitution of
components may impair suitability for Class I, Division 2.
WARNING – EXPLOSION HAZARD –
Do not disconnect
equipment unless power has been switched off or the area is
known to be non-hazardous.
