The 3500/33-01-01 from Bently Nevada delivers reliable relay switching for monitoring systems. This 3500/33 module includes sixteen independent channels. Each channel uses a single-pole double-throw (SPDT) relay. Additionally, this module supports both normally energized and normally de-energized modes. You can select these settings per group of four channels. Therefore, it fits many industrial protection applications.
Power and Operation
Power consumption: 5.8 watts typical
Relay type: Single-pole double-throw (SPDT)
Relay sealing: Epoxy-sealed for environmental protection
Arc suppressor: 250 Vrms (standard)
Contact life: 10,000 cycles
Contact Ratings for Standard Systems
Min switched current: 100 mA @ 5 Vdc
Max switched current: 5 A
DC max power: 70 W @ 24 Vdc, 10 W @ 48 Vdc, 9 W @ 60 Vdc
DC max voltage: 125 Vdc
AC max power: 1200 VA
AC max voltage: 250 Vac
Contact Ratings for Failsafe / Hazardous Area Systems
Min switched current: 100 mA @ 5 Vdc
Max switched current: 5 A
Max switched voltage: 30 Vdc
Low Current Relay Applications (Special)
Min switched current: 1 mA @ 1 Vdc
Max switched current: 100 mA @ 48 Vdc
Gold-plated minimum: 1 mA
Gold-plated maximum: 5 mA (above this, damage may occur)
The front panel provides clear status indication. First, the OK LED lights when the 3500/33 operates properly. Next, the TX/RX LED flashes during communication with other 3500 rack modules. Finally, each CH Alarm LED illuminates when its relay channel enters an alarm state. This design simplifies troubleshooting.
Main Module
Height x width x depth: 241 mm x 24.4 mm x 242 mm (9.50 in x 0.96 in x 9.52 in)
Weight: 0.7 kg (1.6 lb)
Rack space: 1 full-height front slot
I/O Module
Height x width x depth: 241 mm x 24.4 mm x 99.1 mm (9.50 in x 0.96 in x 3.90 in)
Weight: 0.4 kg (1.0 lb)
Rack space: 1 full-height rear slot
The 3500/33-01-01 organizes its sixteen channels into four groups. Each group has four channels. For every group, you can select normally de-energized (ND) or normally energized (NE) operation. This switch-selectable feature increases flexibility. Specifically, you can match relay behavior to failsafe or non-failsafe requirements.
Installation requires a Bently Nevada 3500 rack. First, insert the main module into a full-height front slot. Then, mount the I/O module into the corresponding rear slot. Furthermore, ensure the rack provides adequate cooling. The module consumes only 5.8 watts, so thermal load remains low. Additionally, use proper grounding practices. Always power down the rack before inserting or removing modules.
Packaging List
3500/33-01-01 Main Module (1 unit)
I/O Module (1 unit)
Installation documentation (printed quick guide)
Note: No certificates or warranty documents are included in the package.
Shipping Methods
FedEx, UPS, DHL
1. Can I mix ND and NE settings across different groups on the same 3500/33 module?
Yes. The 3500/33-01-01 allows switch selection per group of four channels. Therefore, group 1 can be ND while group 2 is NE.
2. What happens if a relay exceeds the gold-plated current limit?
Exceeding 5 mA on gold-plated contacts may damage the relay surface. For standard applications above 5 mA, use the standard relay ratings instead.
3. Does the 3500/33-01-01 work with existing 3500 racks?
Yes. This module fits any standard 3500 rack. It communicates directly with other 3500 series modules via the backplane.
4. How do I know if the module is communicating properly?
Watch the TX/RX LED on the front panel. When communication is active, this LED flashes. If it stays off, check rack power and module seating.
5. What is the minimum load for reliable switching?
For standard systems, use at least 100 mA at 5 Vdc. For low current applications, the 3500/33-01-01 supports 1 mA at 1 Vdc with gold-plated contacts.
| Brand Name | Bently Nevada |
| Model No. | 3500/33-01-01 |
| Product Type | Relay Output Module |
| hasMerchantReturnPolicy | Adjust according to reality |
| Shippingdetails | Adjust according to reality |
