1. General Introduction
The TU840 is a module termination unit (MTU) for redundant configuration of Optical Module Bus Modem TB840/TB840A.
The MTU is a passive unit having connections for power supply, double electrical Module Bus, two TB840/TB840A and a rotary switch for cluster address (1 to 7) setting.
Four mechanical keys, two for each position, are used to configure the MTU for the right types of modules. Each key has six positions, which gives a total number of 36 different configurations. The configurations can be changed with a screwdriver.
Termination Unit TU840 connects TB840/TB840A to redundant I/O. Termination Unit TU841 connects TB840/TB840A to non-redundant I/O.
2. Specification of TU840
General info | |
Type | ABB's Module bus |
Article number | 3BSE020846R1 |
Master or slave | Not Applicable |
Line redundancy | Yes |
Module redundancy | Yes |
Hot Swap | No |
Type | Redundant TB840/TB840A, Redundant I/O, Single Power |
Power input | 24 V d.c. (19.2 - 30 V) |
Mounting | Vertical or Horizontal |
Detailed data | |
Connector | N/A |
24 V consumption typ. | N/A |
Module Bus current distribution | Maximum 5V 1.5 A 24V 1.5 A |
Mechanical Keys | 36 different combinations |
Acceptable wire sizes | Solid: 0.2 - 2.5 mm2 Stranded: 0.2 -2.5 mm2, 24 -12 AWG Recommended torque: 0.5 Nm |
Rated insulation voltage | 50 V |
Dialectic test voltage | 500 V a.c. |
Power dissipation | 2.0W |
Environmental and certification | |
Temperature, Operating | 55° C (131° F) horizontal mounted. 40° C (104° F) vertical mounted |
Temperature, Storage | -25° C (-13° F) to +70° C (158° F) |
Equipment class | Class I according to IEC 60536; (earth protected) |
Ingress protection | IP20 according to IEC 60529 |
CE- marking | Yes |
Electrical Safety | cULus |
Hazardous Location | cULus Hazardous Location Class 1 Zone 2, ATEX Zone 2 |
Marine certificates | ABS, BV, DNV-GL, LR, RS |
RoHS compliance | DIRECTIVE/2011/65/EU (EN 50581:2012) |
WEEE compliance | DIRECTIVE/2012/19/EU |
Dimensions | |
Width | 124 mm (4.88 in.) |
Depth | 47 mm (1.85 in.) |
Height | 186 mm (7.32 in.) including latch |
Weight (including base) | 0.45 kg (0.99 lbs.) |
3. Selection table of S800I/O Communication Modules
Name | Line redundancy | Master or slave | Module redundancy | Protocol |
CI801 | No | Slave | No | PROFIBUS DP-V1 |
CI840A | Yes | Slave | Yes | PROFIBUS DP-V1 |
CI845 | Yes | Slave | Yes | N/A |
TB820V2 | No | Slave | No | ABB's Module bus |
TB825(Multi Mode) | No | Slave | No | ABB's Module bus |
TB826(Single Mode) | No | Slave | No | ABB's Module bus |
TB840 | Yes | Slave | Yes | ABB's Module bus |
TB842 | Yes | Slave | Yes | ABB's Module bus |
TC810 | Yes | - | Yes | N/A |
TU807 | - | Not Applicable | - | ABB's Module bus |
TU840 | Yes | Not Applicable | Yes | ABB's Module bus |
TU841 | Yes | Not Applicable | ABB's Module bus | |
TU846 | Yes | Not Applicable | Yes | PROFIBUS DP-V1 |
TU847 | Not Applicable | Yes | PROFIBUS DP-V1 | |
TU848 | Yes | Not Applicable | Yes | ABB's Module bus |
TU849 | Yes | Not Applicable | - | ABB's Module bus |
TU860 | - | - | - | N/A |
