2
INM 7700 Rev 12
2 .3
MTL7700 range – accessories
MTL7700 range of barriers mount directly onto DIN-rail. A
comprehensive selection of mounting, tagging, power and earthing
accessories is available. Installation details are given in section 4.3.
Essential accessories
The following are usually considered essential for mounting and
earthing MTL7700 range of barriers:
DIN-rail (eg, THR2 or THR7000)
Insulating spacers (eg, ISP7000)
Earth terminal (eg, ETL7000)
The tagging systems for individual modules and columns of
barriers are described here. They are shown below under Tagging
accessories for columns of barriers.
Mounting accessories (figure 2)
THR2
Standard DIN-rail, 35 x 7.5mm, (in 1m lengths)
THR7000
Nickel-plated DIN-rail, 35 x 7.5mm, for use in
potentially corrosive atmospheres (in 1m
lengths)
ISP7000
Insulating spacer: attaches to the base of a DIN-
rail to isolate the IS earth from a structural earth
Tagging accessories for individual barriers (figure 2)
TH7700
Tag holder for mounting on the top of an
individual barrier
Tagging accessories for columns of barriers (figure 2)
TAG57
Tagging strips for mounting over a column of
barriers, for marking barrier locations. Supplied
(with labels) in 1m lengths for cutting to size.
TGL7700
Spare labels for use with TAG57 tagging strips:
0.5m strips, supplied in sets of 10.
IMB57
Tagging strip supports. Two needed for each
tagging strip. It can also be used as centre
support by breaking off the top end tab.
Power accessories (figure 3)
BPL7700
Power link for feeding 24V dc to a maximum of
40 barriers in a single column from an MTL7798
power feed module or MTL7799 Dummy
module.
Earthing accessories (figure 3)
ETL7000
Earth terminal providing connections for
routeing the IS earth from the DIN-rail to an
appropriate
plant earth. Two recommended for
each length of DIN-rail.
ERB57S
Nickel-plated straight earth-rail bracket, supplied
with two push fasteners, one 14mm earth-rail
clamp and one 9mm earth clamp < 16mm
2
.
Figure 2:
MTL7700 range of mounting and tagging accessories
Table 1:
MTL7700 range of key barriers
Type
Application
Key barriers
Analogue
input
(low-level)
Resistance temperature detectors
Thermocouples, ac sensors
7755ac
7756ac
7760ac
Analogue
output
Controller outputs, one line earthed
Controller outputs, neither line earthed
7728+
7787+
dc power supply
26V
20-35V
Analogue
input
(high-level)
Transmitters, 2-wire, 4–20mA
7787+
7706
Digital (on/
off) input
Switches
7787+
7707+
7741-44
Digital (on/
off) output
Solenoids, alarms, LEDs
7728+
7707+
