EM-T-7A BANNER ENGINEERING, EM-T-7A Datasheet - Page 5

• Manufacturer Part Number: EM-T-7A
• Description: Extension Module; Relay; Red LED; 24; DIN Rail; UL listed
• Manufacturer: BANNER ENGINEERING

Specifications of EM-T-7A

• Light Source: Red LED
• Mounting: DIN Rail
• Output Type: Relay
• Standards: UL listed
• Voltage, Supply: 24 VAC⁄VDC
• Coil Voltage Vdc Nom: 24V
• Contact Current Max: 6A
• Contact Voltage Ac Nom: 250V
• Contact Voltage Dc Nom: 250V
• Contact Configuration: DPDT-NO
• No. Of Poles: 2
• Relay Mounting: DIN Rail
• External Height: 84mm
• Lead Free Status / Rohs Status: RoHS Exempt Product

device (e.g., a programmable logic
controller/ PLC), other than a safety
relay, between any safety output of the
Extension Module and the master stop
control element it switches. To do so
sacrifices the control reliability of the
control-to-machine interface, and creates
an unsafe condition which could result in
serious injury or death. Whenever a
safety relay is added as an intermediate
switching device, a normally-closed
forced-guided monitor contact of that
relay must be added to the series
feedback loop.
(Reference ANSI B11.1 – 1988,
Appendix B4)
they MUST be installed as shown across
the actuator coil of the master stop
control elements (MSC1 to MSC4).
NEVER install suppressors directly
across the output contacts of the
Extension Module. It is possible for
suppressors to fail as a short circuit. If
installed directly across the output
contacts of the Extension Module, a
short-circuited suppressor will create an
unsafe condition which could result in
serious injury or death.
Banner Engineering Corp. • Minneapolis, U.S.A.
Website: http://www.baneng.com • Tel: [phone]
!
!
WARNING . . .
Maintain Control Reliability
NEVER wire an intermediate
WARNING . . .
Use of Arc Suppressors
If arc suppressors are used,
Figure 3. Generalized EM-T-7A Hookup for One-Channel Control
One-Channel Control (Figure 3)
One-channel control affords simplicity of wiring. However, one-channel wiring requires
eliminating the possibility of an unsafe failure of the control wires (which connect the
output of the Primary Safety Device to the input of the Extension Module). One of the
ways to reduce the probability of such failure is to locate the Primary Safety Device
adjacent to the Extension Module in the same enclosure.
The output of the Primary Safety Device must consist of two or more series-connected,
normally open contacts, coming from forced-guided safety relays. These contacts
must be monitored for failure by the Primary Safety Device. In addition, a single contact
failure cannot prevent normal stopping action, and a successive cycle cannot be
initiated until the failure has been corrected. An example of this type of output is any
single output channel of a Banner E-stop safety module.
*Arc Suppressors
EM-T-7A
Control Elements
(See Warning)
Master Stop
Machine
*
Machine Control Circuit
MSC1
13
14
*
V dc
+24
A1
U
MSC2
23
24
*
Y1
Y2
Extension Module –
MSC3
33
34
V dc
*
A2
0
K
MSC4
43
44
MSC1
MSC Monitor Contacts
MSC2 MSC3 MSC4
L1
L2
NOTE:
This hookup is general in
nature. Your specific hookup
may vary significantly,
depending on the Primary
Safety Device used and the
machine control configuration.
Primary
Safety
Device
Monitoring Contact
Feedback Input
Monitoring Contact
Feedback Input
Model EM-T-7A
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