The iCS 920 panel interconnects up to 24, 2-wire digital input or output channels from barrier strip screw terminals to the 16- or 24-bit digital .1/0 ports, standard on many Intel single board computers and digital I/O expansion boards. Screw terminals allow for one each 16 AWG size wire for differential (2-wire) connections. or two each AWG 18-gauge wire for daisy chaining grounds or power for external 'contact sensing.
Flexibility in Isolation and Serviceability
Dual-in-line sockets are in series with each channel (see Figure 5) to allow customer jumpering for straight through connections (TTL 110), or for insertion of popu-lar DIP packaged opto-isolators or digital output high current driver transistors. Circuit pads are available for
4-8
mounting voltage divider/threshold resistors and protec-tion diodes.
Groups of four inputs can have. mixed voltage levels, opto·isolation, or straight through connections in groups of two. Output groups of four can be mixed opto-isolated or high current drive in groups of two. DIP com-ponents from a wide variety of vendors are selected and inserted by users based on their application. The iCS 920 manual recommends several alternative compo-nents and offers design assistance for your 110 configu-ration. Digital signal conditioning examples for several common industrial voltages are shown in Table 1 and in the diagrams below (see Figure 5).
Active Channel Indicators
Light emitting diodes (LEDs) are mounted adjacent to each channel's screw terminals and may be jumpered in to.indicate the Hi-Lo status of each of the 24 input or output channels.
AFN·01277A
CURRENT LIMITING AND THRESHOLD RESISTORS
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SCREW TERMINALS
OPTO·ISOLATOR SOCKETS
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OPTICALLY ISOLATED DC INPUT EXAMPLE (iCS-920 panel)
OPTO·ISOLATOR + SOCKETS (e.g. TIL 113)
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LINE DRIVER
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CURRENT DRIVER OUTPUT (55V, 300 mAl EXAMPLE (iCS-920 panel)
Figure 5. Digital Signal Conditioning Examples 4-9
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AFN·01277A
iCS
910/920/930
Table 1. ICS 920 Digital 110 Signal Conditioning Plug·ln Component Examples
Digital Voltage Input or Maximum Input Current Threshold Voltage Opto·lsolators· Diode Protection·
Output Load Voltage (rnA) (V)
Opto-Isolated Input
5 VDC 50 3 TIL 117 1 N4002
12 VDC 50 6 TIL117 1N4002
24 to 26 VDC 40 6 TIL117 1N4002
48 VDC 20 12 4N36 1N4002
Maximum Output Current Line Driver· Opto-Isolators·
(rnA) Opto-Isolated Output
12 VDC 100
-
TIL11324 VDC 100
-
TIL11948 VDC 100 - MCS 2
Current Drivers
55 VDC 300 TI75472
-Half Wave Rectifier Outputs
24 VAC SCR 300
-
GE4N40115 VAC SCR 150 - MCS 2
• Example component - alternate source components are listed in the iCS 920 Hardware Reference'Manual.
iCS 930 AC Signal Conditioning/Termination
Panel '
The iCS 930 panel interconnects 16 2-wire digital input or output channels from barrier strip screw terminals to 16 bits of the digital I/O ports available on many Intel single board computers and digital I/O expansion boards. The iCS 930 panel differs from the iCS 920 digital signal' conditioning/termination panel in that the iCS 930 panel handles higher AC or DC voltages and currents (up to 280V, 3A), such as those found on many 115 VAC machines, motor starters, and industrial control panels.
The iCS 930 panel is also recommended for optically isolated DC outputs greater than 100 mAo
The iCS 930 screw terminals accept up to 14 AWG size wire each for differential (2 wires per channel) connec-tions, or two 14 AWG size wires for daisy chaining grounds or power from external sources.
Modular Isolation/Switching with Easy Serviceability
Each iCS 930 panel accepts up to 16 user supplied, op-tically isolated input modules or opop-tically isolated solid state switches, for either AC or DC voltages (see Figure 6). Each module is screw mountable/replaceable and can be mixed for AC or DC input, or AC or DC output, in groups of four. Among groups of four inputs (or outputs)
4-10
each channel can be individually mixed for AC or DC in-put (or AC or DC outin-put). The user pays only for those channels implemented. User supplied compatible mod-ules are shown in Table 2.
DC and AC input modules are current actuated and thus provide a 5-ms filter against spurious noise spikes or contact bounce. AC solid state output modules provide zero crossing turn on to minimize arcing.
Protection Circuitry
Each of the 16 channels contain a socketed fuse to pro-tect against overload. In addition, mounting pads are available on each channel output for user su'pplied volt-age transient RC "snubber" components or inductive pulse suppression, e.g., metallic-oxide-varistor (MOV) for large motor starting.
Active Channel Indicators
Light emitting diodes (LEDs) are mounted adjacent to each channel's screw terminals and opto-module to indicate Hi-Lo status of that channel and to assist in troubleshooting servicing.
Examples of iCS 930 input and output schematics are shown in Figure 6.,
AFN,01277A
910/920/930
Table 2. Optically Isolated Modules Compatible with ICS 930 Signal ConditioninglTermlnation Panel Signal Conditioning Desired Voltage Rating Maximum Input Current Opto·22 Number" Motorola Number"
AC Input - 115 VAC 95 to 130 VAC 10 mA
220 VAC 180 to 280 VAC 10 mA
DC Input - 5 )lsec Filter 10 to 32 VDC 32 mA Fast, 50 )lsec On 4 to 16 VDC 14 mA
Output Current Rating
AC Output 12 to 140 VAC 3A
24 to 280 VAC 3A
DC Output 10 to 60 VDC 3A
200 VDC 1A
* Motorola and Opto-22 sales offices are tocated in North America, Europe, and Japan.
SCREW TERMINALS
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IAC5 IAC5A IDC5 IDC5B
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AC SOLID STATE RELAY OUTPUT EXAMPLE (iCS-930 panel) Figure 6. Typical ICS 930 Signal Conditioning Examples
4-11
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FLAT RIBBON CABLE (3 'Included with CLEAR PLASTIC COVER
BLANK LABELS TO
Figure 7. Mounting Arrangements for Signal CondilioninglTerminal Panels
SPECIFICATIONS
(For iCS 910/920/930 panels unless otherwise specified)