Allen-Bradley 1734-OX2 POINT I/O 2-Channel Relay Module
The Allen-Bradley 1734-OX2 is a 2-channel Form C relay output module belonging to the compact POINT I/O product family. It provides two individually isolated changeover relay contacts (N. O./N.C.) that support direct switching of distinct AC and DC load voltages without requiring external interposing relays.Designed for distributed I/O architectures within CompactLogix and ControlLogix systems,the module mounts on a 1734-TB or 1734-TBS wiring base assembly and draws 100 mA from the internal POINTBus backplane at 5 VDC.
Signal Switching and Electrical Characteristics
Each isolated output channel features a single common connection:Channel 0 uses Terminal 4 as common (N.O.across 4 and 0,N.C.(across 4 and 2)while Channel 1 uses Terminal 5 as common (N.O.across 5 and 3,N.C.(across 5 and 1).The Form C contacts support a broad load range from 5 to 28.8 VDC up to 240 VAC at a 2 A resistive load,with a minimum contact load of 5 mA per point to ensure reliable contact wiping.Isolation between contact sets is tested at 2500 VDC for 1 second (250 V continuous isolation voltage).
The module has a maximum signal turn-on and turn-off delay of 10 ms with a mean contact bounce time of 1. 2 ms. Switching frequency is rated at a maximum of 1 operation every 3 seconds (0. 3 Hz at rated load), yielding an electrical contact life of 1, 000, 000 cycles under resistive loads and 100, 000 cycles under inductive loads. Status monitoring is provided by LED indicators for Module Status, Network Status, and channel activity, while a 7-position keyswitch prevents incorrect module insertion into the wiring base.
| Parameter | Specification |
|---|---|
| Model | 1734-OX2 |
| Brand | Allen-Bradley |
| Product Line | POINT I/O (1734) |
| Product Type | Digital Contact / Relay Output Module |
| UPC | 612598285884 |
| Outputs | 2 Form C (SPDT) Relays, Individually Isolated |
| Contact Voltage Range | 5 to 28.8 VDC / 5 to 240 VAC |
| Current Rating | 2 A Continuous per Point (Resistive) |
| Minimum Contact Load | 5 mA per Point |
| Initial Contact Resistance | 30 mΩ |
| Operate / Release Delay | 10 ms Max (OFF to ON / ON to OFF) |
| Bounce Time | 1.2 ms (Mean) |
| Max Switching Frequency | 1 operation per 3 s (0.3 Hz at rated load) |
| Electrical Contact Life | 1,000,000 cycles (Resistive) / 100,000 cycles (Inductive) |
| POINTBus Current | 100 mA at 5 VDC |
| Power Dissipation | 0.5 W Max |
| Thermal Dissipation | 1.7 BTU/hr Max |
| Isolation Voltage | 250 V Continuous (Tested at 2500 VDC for 1 s between contact sets) |
| Compatible Wiring Bases | 1734-TB, 1734-TBS |
| Keyswitch Position | Position 7 |
| Operating Temperature | -20 to 55 degrees C (-4 to 131 degrees F) |
| Operating Humidity | 5 to 95% (non-condensing) |
| Weight | 0.06 kg (0.13 lbs) / 1.15 oz |
| Dimensions | 56.1 x 11.9 x 75.4 mm (2.21 x 0.47 x 2.97 in) |
Installation Guidelines
The 1734-OX2 does not contain internal output fusing. To protect the module's relay contacts and connected load wiring against overcurrent conditions, external fuses must be installed on each output channel, typically using fused terminal block assemblies.
Frequently Asked Questions
Q: What contact configuration does the 1734-OX2 module provide? A: The module provides two isolated Form C (Single Pole Double Throw) relay contacts, giving both Normally Open (N. O. ) and Normally Closed (N. C. ) connections for each channel.
Q: Does the 1734-OX2 require an external interposing relay when driving mixed-voltage loads? A: No, because each channel is electrically isolated and supports voltages from 5 VDC up to 240 VAC, it can switch loads with different voltage ratings directly without interposing relays.
Q: Does the 1734-OX2 module feature integrated short-circuit protection? A: No, the module lacks internal fuses. External fusing must be provided in series with each output load to protect the contacts from overcurrent.
Allen-Bradley 1734-OX2 POINT I/O 2-Channel Relay Module
Allen-Bradley 1734-OX2 POINT I/O 2-Channel Relay Module
The Allen-Bradley 1734-OX2 is a 2-channel Form C relay output module belonging to the compact POINT I/O product family. It provides two individually isolated changeover relay contacts (N. O./N.C.) that support direct switching of distinct AC and DC load voltages without requiring external interposing relays.Designed for distributed I/O architectures within CompactLogix and ControlLogix systems,the module mounts on a 1734-TB or 1734-TBS wiring base assembly and draws 100 mA from the internal POINTBus backplane at 5 VDC.
Signal Switching and Electrical Characteristics
Each isolated output channel features a single common connection:Channel 0 uses Terminal 4 as common (N.O.across 4 and 0,N.C.(across 4 and 2)while Channel 1 uses Terminal 5 as common (N.O.across 5 and 3,N.C.(across 5 and 1).The Form C contacts support a broad load range from 5 to 28.8 VDC up to 240 VAC at a 2 A resistive load,with a minimum contact load of 5 mA per point to ensure reliable contact wiping.Isolation between contact sets is tested at 2500 VDC for 1 second (250 V continuous isolation voltage).
The module has a maximum signal turn-on and turn-off delay of 10 ms with a mean contact bounce time of 1. 2 ms. Switching frequency is rated at a maximum of 1 operation every 3 seconds (0. 3 Hz at rated load), yielding an electrical contact life of 1, 000, 000 cycles under resistive loads and 100, 000 cycles under inductive loads. Status monitoring is provided by LED indicators for Module Status, Network Status, and channel activity, while a 7-position keyswitch prevents incorrect module insertion into the wiring base.
| Parameter | Specification |
|---|---|
| Model | 1734-OX2 |
| Brand | Allen-Bradley |
| Product Line | POINT I/O (1734) |
| Product Type | Digital Contact / Relay Output Module |
| UPC | 612598285884 |
| Outputs | 2 Form C (SPDT) Relays, Individually Isolated |
| Contact Voltage Range | 5 to 28.8 VDC / 5 to 240 VAC |
| Current Rating | 2 A Continuous per Point (Resistive) |
| Minimum Contact Load | 5 mA per Point |
| Initial Contact Resistance | 30 mΩ |
| Operate / Release Delay | 10 ms Max (OFF to ON / ON to OFF) |
| Bounce Time | 1.2 ms (Mean) |
| Max Switching Frequency | 1 operation per 3 s (0.3 Hz at rated load) |
| Electrical Contact Life | 1,000,000 cycles (Resistive) / 100,000 cycles (Inductive) |
| POINTBus Current | 100 mA at 5 VDC |
| Power Dissipation | 0.5 W Max |
| Thermal Dissipation | 1.7 BTU/hr Max |
| Isolation Voltage | 250 V Continuous (Tested at 2500 VDC for 1 s between contact sets) |
| Compatible Wiring Bases | 1734-TB, 1734-TBS |
| Keyswitch Position | Position 7 |
| Operating Temperature | -20 to 55 degrees C (-4 to 131 degrees F) |
| Operating Humidity | 5 to 95% (non-condensing) |
| Weight | 0.06 kg (0.13 lbs) / 1.15 oz |
| Dimensions | 56.1 x 11.9 x 75.4 mm (2.21 x 0.47 x 2.97 in) |
Installation Guidelines
The 1734-OX2 does not contain internal output fusing. To protect the module's relay contacts and connected load wiring against overcurrent conditions, external fuses must be installed on each output channel, typically using fused terminal block assemblies.
Frequently Asked Questions
Q: What contact configuration does the 1734-OX2 module provide? A: The module provides two isolated Form C (Single Pole Double Throw) relay contacts, giving both Normally Open (N. O. ) and Normally Closed (N. C. ) connections for each channel.
Q: Does the 1734-OX2 require an external interposing relay when driving mixed-voltage loads? A: No, because each channel is electrically isolated and supports voltages from 5 VDC up to 240 VAC, it can switch loads with different voltage ratings directly without interposing relays.
Q: Does the 1734-OX2 module feature integrated short-circuit protection? A: No, the module lacks internal fuses. External fusing must be provided in series with each output load to protect the contacts from overcurrent.
